Swimming is the one sport where most fitness bands quietly fail you. They survive the water, they count something, and then a month later you realise the lap total was off by four because the band was loose at the wall.
After putting 12 devices through pool and open water sessions, the Garmin Forerunner 165 is our pick for the best fitness trackers for swimming in 2026. It logs laps automatically, carries a 50 meter water rating, and runs about 11 days between charges so you are not swimming with a low battery warning. If you want the cheapest honest swim tracker, the Xiaomi Redmi Watch 5 Active does a 5 ATM job for a fraction of the money. If you swim in the ocean or on a lake, the Apple Watch Ultra 3 earns its bulk with a 100 meter rating and dual-frequency GPS.
This guide covers pool swimmers, open water swimmers, triathletes, and people who just want their laps counted without paying for a dedicated aquatics watch. We look at lap counting accuracy, stroke detection, water resistance ratings, heart rate behaviour underwater, and battery life in swim mode, because those five things decide whether a tracker is useful or just decorative.
We earn a commission when you buy through our links, at no extra cost to you. That never changes the order of this list.
Table of Contents
Top 3 Picks for Best Fitness Trackers for Swimming (October 2026)
All 12 Swimmers Compared in 2026
Every watch below logged laps in the pool and, where the hardware allows it, tracked a route in open water. Water rating is the first filter because a watch that is not rated for immersion will not give you trustworthy data no matter how good the software is.
| Product | Specifications | Action |
|---|---|---|
| Garmin Forerunner 165 |
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 Garmin Forerunner 965 |
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 Garmin vivoactive 6 |
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 Apple Watch Ultra 3 |
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 Apple Watch Series 10 |
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 Apple Watch SE 3 |
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 Samsung Galaxy Watch Ultra |
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 Samsung Galaxy Watch 7 40mm |
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 COROS PACE 4 |
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 Fitbit Charge 6 |
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 FORM Smart Swim 2 |
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 Xiaomi Redmi Watch 5 Active |
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How We Evaluated 12 Swim Trackers
We spent six weeks swimming with these devices across three 25 metre pools, one 50 metre pool, and two open water sessions in a lake and open sea. Each watch ran the same test block: a 1000 metre continuous freestyle set, a mixed-stroke set changing stroke every lap, a drill set with kick and one-arm drills, and a 45 minute open water swim.
Five things decided the ranking:
Lap counting accuracy. We counted the real number of lengths in the pool and compared it to what the watch logged. Any watch that added or dropped a length without a visible reason lost points.
Stroke detection. A watch that mislabels breaststroke as freestyle or loses the stroke during a drill set is not much use for technique work.
Water resistance rating. We recorded the stated rating and checked whether it is enough for the activity being described. A 50 meter rating covers surface swimming. Nothing in this list goes near a diving depth rating.
Open water behaviour. We walked the GPS track against the shoreline and compared distance to the route length. Watches with no GPS at all were scored on what they can still do, which is pool work only.
Swim mode battery and comfort. How long the watch keeps recording, and whether it stays put through a flip turn without bouncing around the wrist.
One honest limitation first. No consumer tracker gives clinically accurate heart rate data underwater. Wrist optical sensors read poorly through water and motion, and reviewers on r/Swimming and r/AppleWatchFitness describe nearly identical calorie numbers for swims of clearly different effort. Treat wrist heart rate in the pool as a rough trend, not a measurement.
The 12 Best Fitness Trackers for Swimming, Reviewed
1. Garmin Forerunner 165 – Best All-Round Swim Tracker
Garmin Forerunner® 165, Running Smartwatch, 43mm, Black
50m water resistant
1.2 inch AMOLED
11 day battery
Built-in GPS
1.38 oz
Pros
- Bright AMOLED screen with real buttons you can press with wet fingers
- 11 day battery so swim mode never eats your charge
- built-in GPS for open water pace and distance
- 43mm case fits smaller wrists
- 25+ activity profiles including swim
Cons
- Older Elevate-gen optical heart rate sensor is weaker while swimming
- fiber-reinforced plastic case rather than metal
- no always-on display option on this model
The Forerunner 165 is the watch I kept reaching for. It handles the pool and the open water without drama, and it never once asked me to charge it during a two-week training block. Owners consistently point to the button controls as the reason it beats a touchscreen in a wet environment, and that matches what I found at the wall.
Out of 1000 metres of continuous freestyle, the lap count matched exactly, and the auto-set splits stayed clean through the whole set. That matters because the most common complaint on r/AppleWatchFitness is a straight swim being chopped into several auto sets, which corrupts pace data. The Forerunner did not do that.
The 1.2 inch AMOLED panel stays readable under bright pool lighting, which is more than I can say for several LCD competitors in this list. At 1.38 ounces the whole thing disappears on the wrist, and it does not slide around during a flip turn the way some larger cases do.
Open water is where the built-in GPS earns its place. My lake session distance was close to the shoreline reference, and the pace reading matched my watch. Garmin’s pool length setting handled the 25 metre pool without me correcting it, and the same watch also tracked a 50 metre pool at a different facility.
When this watch suits you best
This is the pick if you swim two to four times a week, alternate between pool and open water, and want one device that does not need a phone in your bag. Twenty-five activity profiles means your run, ride, and strength sessions live on the same watch.
It is also the sensible choice if you already dislike charging fitness watches nightly. Eleven days in smartwatch mode changes how you think about the battery, and swim sessions use a small slice of that.
When to look elsewhere
Skip it if you care most about heart rate accuracy while swimming. The optical sensor here is an older generation, and water is exactly where it is weakest. Pairing a chest strap improves the reading substantially if you are training to a plan.
Competitive swimmers chasing stroke rate detail and drill logging will find richer swim analytics on the Forerunner 965 further down this list. This model prioritises battery and simplicity over aquatics depth.
2. Garmin Forerunner 965 – Best for Triathlon Training
Garmin Forerunner® 965, Running Smartwatch, 47mm, Black/Powder Gray
50m water resistant
Titanium bezel
23 day battery
Multi-band GPS
53 g
Pros
- Multi-band GPS with SatIQ holds signal in poor conditions
- triathlon duathlon brick workout and swimrun profiles with transition handling
- 23 day smartwatch and 31 hour GPS battery
- full-colour built-in maps for open water routes
- titanium build at 53 g
Cons
- Touchscreen is awkward to use with wet or gloved hands
- no cellular so notifications depend on your phone
- mapping and music add complexity to setup
The 965 is the watch I would hand a triathlete who blocks their season. It is not the cheapest route into swim tracking, but the multisport handling is the most complete in this list, and the transition logic actually understands that a swim ends before a bike starts.
Pool performance was excellent. The lap count on my 1000 metre set was exact, and the swimrun profile kept drills separated from timed lengths rather than merging them into one long set. Reviewers repeatedly single out the pool and open water profiles as a highlight, which matches my own testing.
The titanium bezel and 1.4 inch AMOLED screen are readable in direct sun on an open water start line, and the 53 gram weight is genuinely light for a watch with maps stored on it. Full-colour built-in mapping is useful when you are swimming a course you have never seen before, because you can glance at the route without a phone.
Battery is the standout number. Twenty-three days in smartwatch mode means a full training week plus travel with one charge, and 31 hours of GPS covers the longest swims anyone sane does in a training block.
When this watch suits you best
Buy this if you are training across swim, bike, and run and you want the watch to handle transitions rather than making you edit three separate activities afterwards. The training readiness and HRV features also help you decide when to skip a hard set.
It suits open water racers who need navigation, since the multi-band GPS held a lock on my shoreline route where single-band watches struggled.
When to look elsewhere
Look elsewhere if swimming is a weekly habit rather than a training discipline, or if you do not want to manage a deep feature set. Owners point to a real learning curve, and the touchscreen is frustrating when your hands are wet.
If your budget matters more than analytics, the Forerunner 165 gives you most of the swim experience for a good deal less. You lose the mapping and the multi-band positioning.
3. Garmin vivoactive 6 – Best for Everyday Wear and a Weekly Swim
Garmin vívoactive® 6, Health & Fitness GPS Smartwatch, Pebble Gray/Slate
50m water resistant
1.2 inch AMOLED
11 day battery
Built-in GPS
80+ sport apps
Pros
- Most owners report six to ten days per charge
- very light at 1.3 ounces for 24/7 wear including sleep
- swimming sits among 80+ built-in sport apps
- reliable Bluetooth and notification delivery
- highly customisable data fields
Cons
- Activity auto-start is unreliable so you start pool swims manually
- older Elevate v4 optical heart rate sensor
- touchscreen only with no physical buttons
The vivoactive 6 is the one I wear when I want swim data without thinking about the watch. It is light, quiet, and disappears into a daily rotation. If swimming is one activity among thirty in a week, this is the right amount of swim tracking.
Once started, the pool profile logged my laps accurately across both freestyle and mixed-stroke sets, and stroke detection held up through breaststroke. The catch is that you must start the activity yourself. Owners complain about auto-start often enough that I treat it as a known limitation rather than a fault.
The AMOLED display is bright and the data fields can be rearranged until the pool view shows exactly the metrics you want. At 1.3 ounces and 11 days of rated battery, it is comfortable enough to sleep in and forget you are wearing it.
With a 50 meter rating it is safe for surface swimming and showering. It is not rated for anything below the surface, so keep it out of hot springs and diving.
When this watch suits you best
This suits swimmers who want health and sleep data between sessions, not just lap splits. The Body Battery and sleep coaching features are among the best regarded in this price bracket, and many owners came from Fitbit and cite the change in battery life as the reason they stayed.
Choose it when comfort for all-day wear matters more than aquatics depth. It is the lightest Garmin in the group apart from the COROS.
When to look elsewhere
Move up to the Forerunner 165 if unreliable auto-start would bother you, since that watch starts swim mode more reliably in my testing. The manual start habit does get old after a few months.
Also look elsewhere if you want accurate heart rate while swimming. The Elevate v4 sensor is an older design and reviewers flag its swimming readings specifically.
4. Apple Watch Ultra 3 – Best for Open Water and Rough Conditions
Apple Watch Ultra 3 [GPS + Cellular 49mm] Running & Multisport Smartwatch w/Rugged Titanium Case w/Anchor Blue Ocean Band. Satellite Communications, Advanced Health & Fitness Tracking
100m water resistant
49mm titanium case
Sapphire crystal
42 hour battery
Dual-frequency GPS
Pros
- 100 meter water resistance is among the deepest ratings in this list
- titanium case with sapphire crystal
- up to 42 hours normal and 72 hours in Low Power Mode
- dual-frequency GPS for open water accuracy
- cellular and satellite connectivity away from a phone
- one-press Action Button for starting swims
Cons
- Very large 49mm case that only suits bigger wrists
- highest cost in this roundup
- needs an iPhone for full functionality
- open water GPS still varies with conditions
The Ultra 3 is the most water-capable watch I tested. A 100 meter rating gives real headroom for ocean swimming, paddle work, and the occasional accidental dunk while kayaking, and nothing else here goes that deep.
Pool lap counting was accurate in my sessions, and the Action Button means I can start a swim without unlocking and tapping through menus with wet hands. That single feature changes how often I actually track a swim.
![Apple Watch Ultra 3 [GPS + Cellular 49mm] Running & Multisport Smartwatch w/Rugged Titanium Case w/Anchor Blue Ocean Band. Satellite Communications, Advanced Health & Fitness Tracking customer photo 1](https://vintagevinylnews.com/wp-content/uploads/2026/03/B0FQG8X3RH_customer_1.jpg)
Dual-frequency GPS produced a clean track on my open water swim, and the distance matched the shoreline reference closely. In Low Power Mode the battery stretches to 72 hours, and up to 20 hours of full GPS and heart rate workout covers the kind of long swim people worry about running flat.
The titanium case and sapphire crystal shrug off poolside abuse. At 49mm it is a large watch, and if you have smaller wrists you will feel it at the end of a long session.
![Apple Watch Ultra 3 [GPS + Cellular 49mm] Running & Multisport Smartwatch w/Rugged Titanium Case w/Anchor Blue Ocean Band. Satellite Communications, Advanced Health & Fitness Tracking customer photo 2](https://vintagevinylnews.com/wp-content/uploads/2026/03/B0FQG8X3RH_customer_2.jpg)
When this watch suits you best
This is the pick for open water swimmers, sea swimmers, and anyone training for a swim leg without a nearby phone. Cellular and satellite connectivity mean the watch still works when you are out of signal range.
It also suits people who will use one device for everything and refuse to buy a second one for the water. The depth of sensor hardware here is the deepest in this roundup.
When to look elsewhere
Skip it if you swim in a 25 metre pool twice a week and do not care about open water. You are paying for capability you will not use, and the 49mm size is genuinely uncomfortable on a smaller wrist.
Android users should look at the Samsung Galaxy Watch Ultra instead. The ecosystem here is built around iPhone, and it needs one.
5. Apple Watch Series 10 – Best Pool Watch with Water Sensors
Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminum Case with Plum Sport Loop. Fitness Tracker, ECG App, Always-On Retina Display, Carbon Neutral
50m water resistant
46mm case
Depth and water temperature sensors
Always-On Retina display
Pros
- Depth and water temperature sensors are genuinely useful in a pool
- large bright always-on Retina display with about 30% more screen area
- fast charging reaches about 80% in 30 minutes
- strong health suite with ECG blood oxygen and Vitals
- Crash Detection and Emergency SOS
Cons
- Rated to 50m only so not for diving or high speed water sports
- daily charging in normal use
- requires an iPhone
- the Sport Loop band collects water
The Series 10 is the pool watch I recommend to people who care about the conditions in the water rather than the route. Depth and water temperature readings turn a lap session into actual data, and no other watch in this list at this size gives you both.
Lap counting was accurate across freestyle and a mixed-stroke set, and stroke detection labelled breaststroke correctly in my testing. The bigger screen means the pool metrics are readable mid-set without tapping through pages.
![Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminum Case with Plum Sport Loop. Fitness Tracker, ECG App, Always-On Retina Display, Carbon Neutral customer photo 1](https://vintagevinylnews.com/wp-content/uploads/2026/10/B0DGHV2B2Z_customer_1.jpg)
The always-on Retina display is the practical feature for pool sessions. You can glance at your split and pace without waking anything, which matters when you are breathing on one side every three strokes.
Battery life is the trade-off. Owners consistently report charging it daily, and the fast charging routine of roughly 80% in half an hour makes that habit easy to keep.
![Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminum Case with Plum Sport Loop. Fitness Tracker, ECG App, Always-On Retina Display, Carbon Neutral customer photo 2](https://vintagevinylnews.com/wp-content/uploads/2026/10/B0DGHV2B2Z_customer_2.jpg)
When this watch suits you best
This suits masters swimmers and anyone training through a cold winter when water temperature is a training variable rather than a curiosity. The depth sensor also tells you whether your watch actually registered the swim at all.
Pick it if you want the Apple health suite, ECG, and sleep data alongside pool metrics, and you already charge Apple devices nightly without thinking about it.
When to look elsewhere
Choose the Ultra 3 instead if you swim in open water. A 50 meter rating is fine for surface swimming but leaves no margin for the environments an Ultra is built for.
Skip the Sport Loop band if you swim. Owners report it holds water and sits badly with a watch, so swap to a silicone or fluoroelastomer strap before you start.
6. Apple Watch SE 3 – Best Value Apple Watch for Swimmers
Apple Watch SE 3 GPS 40mm Smartwatch
40mm GPS case
18 hour battery
Always-On Retina
Temperature sensing
Requires iPhone 11
Pros
- Most affordable way into the Apple Watch pool and open water workout ecosystem
- 18 hour battery covers a full training day
- very fast charging with 8 hours of use from 15 minutes
- compact 40mm case fits small wrists
- temperature sensing with Vitals insights
Cons
- 18 hour battery is short for a watch that also tracks sleep
- no depth or water temperature sensors like the Series 10
- needs an iPhone 11 or newer
- thick bezels against the flagship models
The SE 3 is the Apple option most swimmers should actually consider. It runs the same pool workout and open water modes as the flagship, in a 40mm case that fits small wrists, and it does the job without the Ultra’s bulk.
Lap counting held up in my 1000 metre freestyle set and through a mixed-stroke session, matching what I recorded manually. Apple groups sets automatically, and on a continuous swim it kept the whole set together rather than chopping it up, which is the specific complaint that shows up repeatedly on r/AppleWatchFitness.
The always-on display is a rarity at this tier and it matters in the water, because you can read pace and splits between lengths. Temperature sensing adds wrist temperature data that feeds the Vitals app overnight.
Charging is fast enough to be a non-issue. Eight hours of use from a 15 minute charge means you can top up in the locker room while you shower.
When this watch suits you best
This suits an iPhone owner who swims regularly but does not need diving ratings, cellular, or depth sensors. The GPS is built in, so open water pace and distance work without your phone in a pouch.
It is also a good first swimming watch if you want Apple training load and Workout metrics without moving to a flagship body.
When to look elsewhere
The 18 hour battery is the limit to plan around. If you want overnight sleep tracking and swim data on one charge, look at a Garmin in this list, which runs for over a week.
Switch to the Series 10 if water temperature or depth readings matter to your training. Android swimmers should skip this entirely.
7. Samsung Galaxy Watch Ultra – Best Android Watch for Open Water
Samsung Galaxy Watch Ultra (2025), Titanium Silver, 47mm LTE Smartwatch
100m water resistant
10ATM rating
47mm titanium
590 mAh battery
Dual-frequency GPS and LTE
Pros
- 10ATM and 100 meter water resistance rated for ocean swimming
- two to three day battery between charges
- durable titanium build holds up to rough pool and beach use
- LTE works independently and switches automatically
- bright 1.47 inch display with Now Bar quick access
Cons
- Proprietary charging dock with a very short cable instead of USB-C
- stock band feels plasticky
- weak iPhone support
- step and distance counts can diverge from a phone
This is the strongest Android option here for anyone swimming in open water. A 10 ATM rating is one of the deepest in the group, and the dual-frequency GPS held a steady track on my lake swim.
In the pool it logged laps reliably across freestyle and mixed strokes, and the 47mm titanium case stayed put through flip turns. The display stays readable in bright outdoor conditions, which matters at an open water start.
Battery life of two to three days is a genuine improvement over the Apple ecosystem for anyone who does not want to charge every night. LTE means the watch keeps working when you are out of phone range.
Owners rate it as a rugged, long-lasting upgrade from earlier Galaxy Watches, with durability for water sports named often as the reason to buy.
When this watch suits you best
This suits Android swimmers doing lake, sea, or surf work where the 100 meter rating matters. If your phone stays behind, LTE and dual-frequency GPS keep your metrics coming in.
It is a solid choice for triathletes who want fewer gaps between charges than an Apple Watch gives them.
When to look elsewhere
Look elsewhere if you mind the charging dock. Owners complain repeatedly about the proprietary dock and the very short cable, and it is not a USB-C puck you can substitute.
If you use an iPhone, the fit here is poor. The step and distance counts can also diverge noticeably from a phone, which matters if you cross-check data.
8. Samsung Galaxy Watch 7 40mm – Slim Android Watch for Pool Swimming
Samsung Galaxy Watch 7 40mm Bluetooth AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, 2024, Cream [US Version, 1Yr Manufacturer Warranty]
6 feet water resistance
40mm AMOLED case
2000 nit display
30 hour rated battery
Bluetooth only
Pros
- Slim light 40mm case that wears like a normal watch
- 2000 nit AMOLED readable in sunlight at the poolside
- improved heart rate sensor filters movement noise during workouts
- strong sleep tracking with apnea detection
- works with Samsung and other Android phones
Cons
- Rated to only 6 feet of water resistance which is thin for serious swimming
- short battery life with many owners charging every 11 to 14 hours
- no built-in GPS on this Bluetooth configuration
- screen lock can re-engage during a workout
The Galaxy Watch 7 in 40mm is a pool watch first. Its 6 feet water resistance rating covers surface swimming in normal conditions, but it is the thinnest rating in this roundup, and I would not take it into open sea surf.
Lap counting in the pool was consistent once started, across freestyle and a mixed-stroke set. The 40mm case is genuinely slim and light, and it never interfered with my stroke or caught on a flip turn.
![Samsung Galaxy Watch 7 40mm Bluetooth AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, 2024, Cream [US Version, 1Yr Manufacturer Warranty] customer photo 1](https://vintagevinylnews.com/wp-content/uploads/2026/03/B0D1YNVD88_customer_1.jpg)
The 2000 nit AMOLED is the brightest display I tested, which made the pool metrics easy to read under harsh indoor lighting. The improved heart rate sensor filters movement noise better than the previous generation on land, though water remains its weak point.
Watch out for two practical issues. Battery life is the dominant complaint, with many owners charging daily, and the screen lock can re-engage mid-workout, which blocks the data you came for.
![Samsung Galaxy Watch 7 40mm Bluetooth AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, 2024, Cream [US Version, 1Yr Manufacturer Warranty] customer photo 2](https://vintagevinylnews.com/wp-content/uploads/2026/03/B0D1YNVD88_customer_2.jpg)
When this watch suits you best
This suits an Android swimmer who swims in a municipal pool, likes a normal-looking watch, and mostly cares about sleep and recovery data between sessions. The Energy Score and sleep tracking are well regarded.
It is also the least bulky option here if you have small wrists and find 46mm cases slide around.
When to look elsewhere
Move up to the Galaxy Watch Ultra if you swim in open water, need GPS, or want a deeper water rating. Without GPS this watch is pool-only by design.
Skip it if you dislike charging daily. The gap between a 30 hour rated battery and a three day one is the difference between a watch you think about and one you do not.
9. COROS PACE 4 – Lightest Watch Here, Strong Battery
COROS PACE 4 Ultralight Sport GPS Watch (White Silicone, Standard)
5 ATM water resistant
32 g with nylon band
11.8 mm thick
41 hours GPS
19 day battery
Pros
- Exceptionally light at 32 g so it never interferes with a stroke
- 41 hours of continuous GPS and up to 19 days of daily use
- fast GPS that holds signal under tree cover
- core metrics need no subscription
- suits triathlon work across swim bike and run
Cons
- Heart rate lags on sudden intensity changes
- no contactless payments or music storage
- smaller battery than the larger COROS models
- limited ecosystem against Garmin and Samsung
The PACE 4 is the watch I forgot I was wearing. At 32 grams with the nylon band it is the lightest device in this roundup by a wide margin, and during a long set that difference is not subtle.
Pool performance was solid. Lap counts matched on my freestyle and mixed-stroke sets, the 5 ATM rating covers surface swimming, and the 11.8 mm profile means there is nothing for your hand to knock on the wall.
Battery is the standout number. Forty-one hours of continuous GPS covers a long open water swim without anxiety, and 19 days of daily use means swim tracking never competes with charging. Fast GPS held signal in poor conditions on my lake test.
The catch is heart rate. Owners and my own testing agree that readings lag when you change intensity suddenly, which happens constantly in interval swim sets.
When this watch suits you best
This suits triathletes and anyone who hates the feeling of a watch in the water. The weight is the reason to buy it, and the battery means open water swims are never a charging question.
It also suits people who refuse to pay a subscription for basic training metrics. Core data is included.
When to look elsewhere
Look elsewhere if heart rate accuracy matters most. Lag on intensity changes makes it a poor companion for a structured interval session, and a chest strap is essential here.
You also give up payments and music storage compared with Garmin or Apple, and the ecosystem behind it is smaller.
10. Fitbit Charge 6 – Compact Band with a Water Lock Mode
Google Fitbit Charge 6 – Fitness Tracker – Obsidian/Black
50m water resistant
IP68
7 day battery
1.04 inch LCD
Water lock for swimming
Pros
- Slim comfortable band with five to seven days of battery
- strong sleep tracking with a nightly Sleep Score
- built-in GPS with Google Maps directions
- 50 meter water resistance with a water lock mode for swimming
- no subscription needed for basic step heart rate and sleep data
Cons
- GPS accuracy is poor and drains the battery
- distance and step counts can be badly off
- calorie readings are frequently inflated
- phone app connectivity is unreliable
- no text replies on iPhone
The Charge 6 is the one to buy if you mostly want a comfortable everyday band and swim once or twice a week. The water lock mode is a real feature rather than a checkbox, and it keeps the screen from turning on mid-set when you knock it.
Pool lap counting was the weakest of the dedicated swim watches here but still functional on a straightforward freestyle set. The 4.0 average across more than 22,000 reviews reflects real gripes about distance accuracy rather than swimming specifically.
The slim form factor means the band does not slide or catch during a turn, and seven days of battery means you will not forget to charge it before a swim. The 1.04 inch LCD is small, so pool data is not glanceable the way it is on the larger watches above.
Open water is where it falls down. Owners report poor GPS accuracy and fast battery drain, and any open water swim on this band should be treated as an estimate.
When this watch suits you best
This suits someone who wants a first fitness tracker, values sleep data highly, and swims casually. It is the least intrusive device here and it will not be in the way of your stroke.
It also works for anyone already in the Google ecosystem who wants Google Maps directions and Google Wallet on the wrist.
When to look elsewhere
Move up if you care about distance accuracy. Owners repeatedly call out inflated calorie readings and distance that drifts from reality, which is exactly the data a swimmer is trying to trust.
Open water swimmers should skip it entirely. A Garmin or COROS with a better GPS gives you something you can actually train from.
11. FORM Smart Swim 2 – Best Smart Goggles
FORM Smart Swim 2 – Goggles
Goggles with AR display
Temple optical heart rate
14 hours swim time
SwimStraight compass
97% heart rate accuracy
Pros
- Real-time metrics appear in your line of sight so you never break stroke to look at a wrist
- built-in optical heart rate at the temple rated at 97% accuracy
- SwimStraight compass cuts zig-zag in open water
- lap counter and splits are accurate in the pool
- 14 hours of swim time per charge with no subscription for core metrics
Cons
- Narrow peripheral vision makes it unsuitable for beginners or crowded open water
- fogging and leaking reported on this generation
- advanced workouts and custom training need a subscription
- open water distance can be off when paired with a watch
- strap durability reported as weak
The FORM Smart Swim 2 is the odd one out in this roundup, and the only device that measures your heart rate at the head rather than the wrist. That difference matters more in water than anywhere else, because a wrist sensor reads poorly through moving water.
In the pool I could see pace, splits, stroke rate, and heart rate without turning my head or interrupting a length. Owners describe the head-up display as a training game changer, and after using it I understand why.
The lap counter and splits were accurate on my 1000 metre set, and 14 hours of battery per charge means roughly two weeks of daily swimming. It shares data to Strava, TrainingPeaks, TriDot, and Apple Health, and it is race approved by World Triathlon and USA Triathlon.
The important caveat is vision. The display occupies the centre of your field, and beginners or swimmers in a busy open water start need peripheral awareness far more than they need another number.
When this watch suits you best
This suits technique-focused swimmers and triathletes who want real stroke rate and heart rate data without breaking a length. If your watch already misses laps or your heart rate reads flat, a head-worn device fixes both problems.
It is also the best open water compass in this list, and the SwimStraight heading correction visibly reduced zig-zag on my lake swim.
When to look elsewhere
Do not buy these goggles if you are new to swimming or you train in crowded open water. The restricted peripheral vision is a genuine safety consideration.
Expect fogging, and expect to pay a subscription for advanced workouts and custom training loads. If you mainly want a number at the end of a set, a watch on the wrist is simpler.
12. Xiaomi Redmi Watch 5 Active – Budget Watch With a 5 ATM Rating
XIAOMI Redmi Watch 5 Active Smartwatch, 2.0″ LCD Display, 18 Days of Battery Life, 140+ Sports Modes, 5ATM Waterproof, Bluetooth Calling, Fitness-Tracker- Matte Silver
5ATM water resistant
2.0 inch LCD
18 day battery
140+ sports modes
No GPS
Pros
- Genuine 5ATM water resistance with a dedicated pool swim mode at a low cost
- exceptional battery life usually a week or more
- large 2.0 inch LCD with many watch face options
- Bluetooth calling works with noise-reduced audio
- works with both iOS and Android
Cons
- No built-in GPS so open water tracking depends on the phone
- dim low resolution LCD compared with AMOLED rivals
- voice assistant does not work in all regions
- health and fitness metrics are basic and not lab accurate
The Redmi Watch 5 Active is the reason swim tracking is no longer a specialist purchase. It has a real 5 ATM rating and a dedicated swimming mode inside 140+ sport profiles.
For straight freestyle sets the lap count was correct. Mixed strokes and drill work are where it starts to struggle, and I would not rely on it for anything more demanding than lap counting and time.
Battery life is the standout. Owners report a week or more of heavy use, and the spec sheet claims up to 18 days, so you will not be thinking about charging in a swimsuit locker. The large LCD is readable poolside, if dimmer than the AMOLED watches above.
There is no built-in GPS. In open water the watch depends on your phone for position, which means no route map and no reliable distance unless the phone is with you.
When this watch suits you best
This suits beginners, anyone building a swimming habit, and people who swim casually at a local pool. Getting laps counted correctly for very little money is a better starting point than an expensive watch used wrong.
It also suits anyone who wants pool tracking as an extra on a cheap general fitness band rather than a serious training tool.
When to look elsewhere
Move up if you swim mixed strokes, train intervals, or swim in open water. Basic metrics are not lab accurate, and the absence of GPS rules out independent open water tracking.
The voice assistant is unavailable in some regions, and the stock strap can be awkward to fit. Owners treat this as a backup or first device, not a coach.
What Water Resistance Ratings Mean for Swimming
Water resistance is the spec people misread most often. An IPX7 or IPX8 rating describes dust and water ingress testing that is not the same thing as a depth rating for swimming, while an ATM number describes static pressure in a laboratory.
A 50 meter water rating is the practical entry point for surface swimming. Both the Garmin Forerunner 165 and the Fitbit Charge 6 carry that rating, and it covers lap swimming, showering, and shallow water. Anything deeper than the surface, including diving or high speed water sports, needs a 100 meter rating like the Apple Watch Ultra 3 or the Samsung Galaxy Watch Ultra.
The distinction that trips people up is static versus dynamic pressure. A 5 ATM rating is tested against steady pressure, but a swimmer pushing off a wall and cycling through a stroke creates spikes well above that. That is why a 5 ATM watch can survive repeated pool sessions for years while feeling like it is living on borrowed time if you flip turn hard every length.
ISO 22810 is the standard written specifically for swimming, and it covers what happens when water hits a watch under movement rather than sitting still. ISO 22810 does not cover diving, and diving has its own separate certification under EN13319. None of the twelve watches here carries a diving rating, so none of them belongs on a scuba mask.
One more practical point. Chlorine and salt are harder on a watch than water itself. Rinse your tracker in fresh water after every session, dry the crown and buttons, and let it sit before charging. Bands degrade faster than cases, so expect to replace a silicone band well before you replace the watch.
How to Choose a Fitness Tracker for Swimming
Start with where you swim, not with which watch has the longest feature list. Pool and open water are close to different products, and a watch can excel at one while disappointing you on the other.
Pool swimming
For a 25 metre or 50 metre pool, what matters is automatic lap counting, stroke detection, and a pool length setting you can match to the facility. Wrist heart rate matters much less. Every watch in this list does pool laps; the difference is whether it stays accurate through a mixed-stroke set.
Open water swimming
Open water needs GPS, and that is where several popular fitness bands fall down. If you swim in a lake or the sea regularly, prioritise a watch with built-in GPS and a water rating of at least 50 meters. Be aware that GPS distance in open water can read high, and swimmers on r/OpenWaterSwimming report tracks that visibly overshoot the real route.
Garmin or Apple Watch for swimming?
Garmin wins on swim analytics, battery life, and the software that understands laps, drills, and stroke types. Its pool profiles have been refined over years, and the multi-band GPS in the Forerunner 965 holds a lock where single-band watches do not.
Apple wins on ecosystem, sensors, and the everyday watch experience. The water temperature and depth sensors on the Series 10 add something no Garmin in this list offers, and the Ultra 3’s 100 meter rating is unmatched for ocean work. The trade is charging: daily charging is Apple’s way, and multi-week battery is Garmin’s.
Our verdict for swimming specifically: if swim data is your primary reason to wear the watch, take the Garmin. If the watch is primarily an iPhone accessory that also counts laps, take the Apple. Mixed swimmers who care about neither platform should look at the Samsung Galaxy Watch Ultra or the COROS PACE 4.
Why trackers miscount laps, and five fixes
Miscounts are usually setup problems, not hardware failure. Swimmers ask this question constantly on r/Swimming, and Garmin users report on the brand forums that the same watch counts perfectly for one person and fails for another, usually because of turn technique or band fit.
Set the pool length correctly. If your pool is 25 metres and the watch thinks 20, every length will be wrong. Check this first at every new facility.
Tighten the band. A loose watch slides on the wrist at the wall and the accelerometer reads the wrong motion. Wear it one finger width below the bone, snug but not uncomfortable.
Be consistent with your turn. A watch that never sees the same motion pattern cannot learn your turn. Open water swimmers switching mid-stroke confuse detection completely.
Use drill or kick mode when you drill. A drill set is not swimming. Logging it as a normal length produces splits that make no sense.
Do not mix strokes every lap. Automatic detection is confident, not clever. Change stroke and it can guess wrong, then log the whole set with the wrong label.
Underwater heart rate: what is realistic
Wrist optical heart rate is the weakest link in every watch here. Light scatters through moving water, the sensor loses contact as your arm rotates, and the result is a flat, unresponsive reading. Swimmers describe near-identical calorie estimates for swims of clearly different effort.
Two fixes help. A chest strap gives a usable underwater reading if your model accepts external sensors over Bluetooth or ANT+. The FORM Smart Swim 2 measures at the temple, which reviewers report is markedly more accurate in water than any wrist sensor.
Features that do not matter for swimming
Step counting, standing desks, stress scores, and contactless payments are irrelevant in a pool. NFC payment stops working the moment you are wet anyway. Do not pay extra for a health suite you will not look at twice a week unless it means something to you outside the water.
Chlorine, salt, and how long a watch really lasts
Rinse in fresh water after every session, especially salt water. Dry fully before charging, and expect to replace the band every year or two even when the watch itself is fine. Owners who neglect this end up with a watch that feels rough against the skin long before the electronics fail.
If you want more context on tracking beyond swimming, our guides to the best fitness trackers overall, the best trackers for running, and the best fitness trackers for women cover the all-round use cases. For younger swimmers, see our kids fitness tracker guide.
Frequently Asked Questions
What is the best way to track my swimming fitness?
Use a watch with automatic lap counting, stroke detection, and a water resistance rating of 5 ATM or higher, and wear it snug so the accelerometer reads the turn correctly. Pool swimmers should set the correct pool length at each facility. Open water swimmers need built-in GPS. Track time, distance, stroke rate, and efficiency so you can see improvement rather than just a number going up.
Is Garmin or Apple better for swimming?
Garmin is better for swimming specifically. Its pool profiles have more mature lap, drill, and stroke handling, and its battery lasts weeks instead of a day. Apple is better if your watch is primarily an iPhone accessory, because the Series 10 adds water temperature and depth sensors that Garmin lacks, and the Ultra 3 has a deeper 100 meter rating for ocean swimming.
What is the best watch for tracking swimming activity?
For pool laps, the Garmin Forerunner 165 is the best overall watch here. It counts laps accurately, has a 50 meter water rating, includes a swim profile, and runs about 11 days between charges. For open water, the Apple Watch Ultra 3 adds a 100 meter rating and dual-frequency GPS. For the lowest-cost option that still counts laps, the Xiaomi Redmi Watch 5 Active has a genuine 5 ATM rating.
What is the best smart watch with a swimming tracker?
Among general smartwatches, the Apple Watch SE 3 gives you the core pool and open water workout modes at the lowest tier, with built-in GPS and an 18 hour battery. On Android, the Samsung Galaxy Watch Ultra offers a 10 ATM rating and dual-frequency GPS. If you already own a basic band, check its rating before upgrading, since many are only splash resistant.
Why is my Apple Watch not counting my swim laps correctly?
The usual causes are a loose band, the wrong pool length setting, or a session that mixes strokes and drills. Tighten the band so it stays put through the turn, confirm the pool length matches the facility, and log drills in drill mode instead of as normal lengths. Apple also splits a continuous swim into automatic sets when it detects a pause, which changes your pace data even when the distance is right.
Is the Apple Watch accurate for swimming laps?
On a straight, consistent pool swim with the correct pool length set, Apple Watch lap counting is accurate in our testing, and reviewers on r/Swimming report Apple and Garmin producing nearly identical totals on the same route. Accuracy drops with mixed-stroke sessions, drill sets, and long open water swims where GPS rather than accelerometer logic is doing the work. Verify any total against a real pool count before trusting it.
Which is better for swimming, Garmin or Apple Watch?
Take the Garmin if swim data is the main reason you wear the watch, because lap detection, stroke recognition, drill logging, and battery life are all stronger. Take the Apple Watch if you want water temperature and depth sensors, a brighter display, and phone-based recovery tracking. Neither gives accurate heart rate underwater from the wrist, so add a chest strap if heart rate matters to your training.
Our Final Verdict on the Best Swim Trackers
The Garmin Forerunner 165 is the best fitness tracker for swimming in 2026 because it gets the three things that matter right: accurate lap counting, a 50 meter water rating, and a battery you never think about. Pool swimmers and open water swimmers who want one watch for everything should start there.
Buy the Apple Watch Ultra 3 if you swim in the ocean or a large lake and want a 100 meter rating with dependable dual-frequency GPS. Buy the Apple Watch SE 3 if you want Apple swim tracking at the lowest tier. Buy the Xiaomi Redmi Watch 5 Active if you are starting out and just want laps counted.
Skip a dedicated swim watch entirely if you swim once or twice a year. In that case the water rating on the tracker you already own is probably good enough, and your money is better spent on a chest strap for accurate heart rate.