Best Swimming Watches for Tracking Workouts

The best swimming watches are Garmin Swim 2 for pool-focused swimmers, Apple Watch Ultra 2 for swimmers who also want a full smartwatch, and Suunto Race for long open-water sessions; the right choice depends more on GPS behavior, lap detection, battery life, and screen readability than on the number of advertised sports modes.

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Quick picks by swimming situation

• Best dedicated pool choice: Garmin Swim 2. It is light, simple to operate, and built around lengths, intervals, stroke type, drills, and rest time rather than general smartwatch features.
• Best premium all-rounder: Apple Watch Ultra 2. Its bright, large display and strong workout interface suit pool and open-water swimming, especially if you already use an iPhone.
• Best for long open-water training: Suunto Race. Its large display, long GPS battery life, and 100-meter water rating make it a useful endurance-training option.
• Best lightweight multisport option: COROS Pace 3. It weighs about 30 grams with its nylon band and provides pool and open-water profiles without the bulk of a rugged watch.
• Best if running matters as much as swimming: Garmin Forerunner 965. It combines detailed swim recording with advanced running and triathlon tools, but costs more than a swim-specific watch.

Head-to-head comparison

Battery figures are manufacturer-rated maximums and vary with GPS mode, screen brightness, notifications, music, temperature, and cellular use. A watch that lasts 40 hours in a particular GPS mode may need charging considerably sooner when used as a daily smartwatch.

Pool accuracy: what actually determines lap detection

Pool watches generally do not count lengths by watching the pool wall with GPS. GPS signals are unreliable underwater, so the watch uses motion sensors to identify turns, push-offs, and changes in arm movement. You must enter the correct pool length—commonly 25 yards, 25 meters, or 50 meters—before starting.

Garmin Swim 2 has one of the clearest pool-first designs. It records distance, pace, intervals, rest, stroke type, stroke count, and SWOLF-style efficiency data. Apple Watch Ultra 2 and the multisport watches from Garmin, COROS, and Suunto offer similar core metrics, although the menus and post-workout analysis differ.

Lap detection is most reliable when you:

• Set the exact pool length before pressing start.
• Push off consistently rather than stopping mid-length.
• Keep the watch on the wrist used for your normal stroke rhythm.
• Avoid switching strokes repeatedly during a short length.
• Pause the workout when resting at the wall instead of leaving it running through a long conversation.

A watch can miscount when you stop without reaching the wall, perform a loose or unusually short turn, use kickboard drills, or change direction in a crowded lane. For structured training, manual interval controls are more dependable than expecting automatic detection to understand every drill.

Open-water accuracy: GPS is the deciding factor

Open-water swimming is harder to track because the watch repeatedly disappears below the surface. GPS usually records a position only when the antenna briefly rises above water, so the route may look jagged, cut corners, or show extra distance. This is a limitation of satellite reception, not simply a failure of one brand.

For lake, river, and sea training, prioritize a watch with a stable open-water profile, configurable recording behavior, a readable screen, and enough battery for the whole outing. Apple Watch Ultra 2, Suunto Race, Garmin Forerunner 965, Garmin Swim 2, and COROS Pace 3 can all be considered for open-water recording, but their route quality will still depend on stroke style, waves, trees, buildings, and water conditions.

Dual-frequency or multi-band GPS can improve positioning in difficult environments, but it cannot make GPS work underwater. If you need a dependable course record, swim with a planned route and treat the watch distance as an estimate rather than a survey-grade measurement.

Stroke tracking and readability

Most serious swimmers should look for freestyle, backstroke, breaststroke, butterfly, mixed, drill, and rest recognition. Stroke identification is useful for reviewing a workout, but it is not infallible. Fin sets, one-arm drills, sculling, and frequent changes in technique can confuse any wrist-based algorithm.

Screen design matters during a hard set. A large AMOLED screen such as those on Apple Watch Ultra 2, Suunto Race, and Forerunner 965 is easy to read, but high brightness can reduce battery life. The Garmin Swim 2 uses a smaller, lower-power display that is less visually impressive but practical in a pool. COROS Pace 3 trades display richness for low weight and long endurance.

Physical buttons are valuable when your fingers are wet or the water is turbulent. Touchscreens can be convenient before and after a workout, but accidental touches and wet-screen behavior make button controls preferable for starting intervals, pausing, or checking data mid-session.

Decision matrix: choose by workload and priorities

Battery planning: a practical calculation

Suppose your weekly plan includes three 75-minute pool workouts and one two-hour open-water workout. That is 5.75 hours of recorded exercise each week. A watch rated for 13 hours of GPS, such as Garmin Swim 2, has a theoretical margin of roughly 2.3 weeks of workout recording:

13 hours ÷ 5.75 hours per week = 2.26 weeks.

That does not mean you can leave it uncharged for 16 days. Daily notifications, optical heart-rate monitoring, screen use, software updates, and battery aging reduce the margin. For this schedule, charging once or twice per week is a safer habit. A watch rated for 38 or 40 hours of GPS gives considerably more flexibility for an event or multi-day trip, but only if its charging routine fits your other daily use.

Water resistance and ownership realities

Water resistance is not permanent. Seals age, buttons can wear, and impacts may damage the case without leaving an obvious mark. A 5 ATM rating is suitable for swimming when the manufacturer permits it, while a 100-meter rating provides a larger margin for water exposure; neither rating makes a watch suitable for scuba diving unless the product specifically says so.

Rinse the watch and band with fresh water after chlorinated or salt-water sessions, wipe away sunscreen and sweat, and let the charging contacts dry before connecting the cable. Do not charge a wet watch. Avoid pressing buttons underwater unless the manufacturer explicitly supports that action, and do not use a hair dryer or place the watch on a radiator to speed drying.

The band is usually the first consumable part. Silicone bands can become stiff, discolored, or cracked; nylon bands dry quickly but may retain odor if stored wet. Replacing a band is normally cheaper than replacing the watch, so choose a standard, readily available attachment system where possible.

Bottom line

Choose Garmin Swim 2 if accurate, uncomplicated pool training is the priority. Choose Apple Watch Ultra 2 if readability and general smartwatch capability matter as much as swim metrics. Choose Suunto Race for long open-water and endurance use, COROS Pace 3 for a light multisport watch, and Garmin Forerunner 965 when swimming is part of a larger running or triathlon program. Whichever model you select, enter the correct pool length, verify the first few workouts against known distances, and treat open-water GPS tracks as useful training records rather than exact measurements.