The best heart rate monitor for swimming in 2026 is the Garmin HRM-Swim, offering reliable heart rate tracking and storage for swim sessions. For an alternative, the Polar H10 provides excellent accuracy and can be paired with swim goggles with a fitness watch.
Check price on AmazonSwimming is one of the most effective full-body workouts, but tracking heart rate in the water has historically been a challenge. Unlike running or cycling, standard chest straps or wrist-based optical sensors often lose accuracy due to water interference, movement, or signal dropout. That is why finding a heart rate monitor specifically designed for swimming is crucial for swimmers, triathletes, and fitness enthusiasts who want to optimize their training zones and measure effort accurately.
In this roundup, we analyzed the top heart rate monitors on the market, focusing on models that excel in aquatic environments. We ranked them based on validated accuracy in pool and open water, user-reported comfort, and compatibility with popular swim watches and goggles. Our picks range from premium chest straps to innovative armband and watch-based solutions, ensuring there is an option for every swimmer’s needs and budget. All recommendations are supported by research, expert reviews, and aggregated owner feedback.
How we rank
We ranked these heart rate monitors based on a combination of independent lab accuracy tests, expert reviews from swimming and triathlon publications, and aggregated user ratings from verified purchasers. See our method.
Quick picks
| Best for | Product | Who it suits |
|---|---|---|
| Best Overall | Garmin HRM-Swim | Serious swimmers and triathletes who want accurate heart rate data during swims |
| Best for Accuracy | Polar H10 | Data-driven swimmers who need the most precise heart rate data for training zones |
| Best for Triathletes | Wahoo TICKR X | Triathletes who need a versatile monitor for swim, bike, and run |
| Best Armband | Scosche RHYTHM+ | Swimmers who find chest straps uncomfortable or want an arm-based alternative |
| Best Smartwatch | Apple Watch Ultra 2 | Swimmers who want a comprehensive smartwatch with swim tracking and heart rate |
| Best with Display | FORM Smart Swim Goggles | Swimmers who want real-time heart rate data displayed in their field of view |
| Best for Multisport | Garmin HRM-Pro Plus | Swimmers who also run and cycle and want a single monitor for all sports |
The picks, compared
Garmin HRM-Swim
The Garmin HRM-Swim is a dedicated chest strap heart rate monitor designed for pool and open water swimming. It stores heart rate data during the swim and syncs to your Garmin watch or smartphone afterward. Reviewers highlight its comfortable fabric strap and reliable signal underwater.
What owners say: Owners consistently praise the HRM-Swim for its accurate heart rate readings during lap swimming and open water sessions. Many note that it stays in place even during flip turns and provides useful metrics like heart rate zones and calorie burn.
- Stores data onboard for syncing later
- Comfortable and secure fit
- Compatible with most Garmin watches
- Requires Garmin ecosystem for full features
- Battery life could be longer
Polar H10
The Polar H10 is widely regarded as one of the most accurate heart rate monitors across all sports, including swimming. It uses a medical-grade chest strap with ECG-accurate sensors and dual connectivity via Bluetooth and ANT+. It can be paired with swim goggles like the FORM Smart Swim Goggles for real-time display.
What owners say: Users frequently mention the H10's reliability and consistency, even in saltwater. Many triathletes appreciate its ability to connect to multiple devices simultaneously and the long battery life.
- Exceptional heart rate accuracy
- Dual Bluetooth and ANT+ connectivity
- Works with many fitness apps and smart goggles
- Strap can slip on some swimmers
- No onboard storage
- requires live connection
Wahoo TICKR X
The Wahoo TICKR X is a feature-packed chest strap that works well for swimming and other sports. It offers onboard storage for workouts, allows for running metrics like cadence and ground contact time, and pairs seamlessly with Wahoo fitness products. Its waterproof design holds up to pool and open water.
What owners say: Owners report that the TICKR X is reliable in the water and easy to sync with different devices. They appreciate the advanced metrics for running and the ability to store swim data when used without a phone.
- Onboard memory for up to 50 hours
- Includes running dynamics
- Connects to multiple devices
- Strap finicky after extended use
- Setup can be complex for beginners
Scosche RHYTHM+
The Scosche RHYTHM+ is an optical heart rate monitor that straps around the forearm or bicep. It uses dual-wavelength optical sensors and silicone cover to stay in place during swimming. It is waterproof to 30 meters and offers Bluetooth and ANT+ connectivity.
What owners say: Users like the comfort of the armband design, especially those who dislike chest straps. They note that accuracy is good but can be slightly less consistent than chest straps during intense intervals.
- Comfortable armband design
- Good water resistance (30m)
- Works with most apps and watches
- Optical sensor less accurate than chest strap
- Battery life shorter than chest options
Apple Watch Ultra 2
The Apple Watch Ultra 2 is a rugged smartwatch with excellent swim tracking capabilities. Its optical heart rate sensor works well in water, and it offers GPS tracking for open water, depth gauge, and a programmable action button. It records heart rate continuously and syncs with Apple Health.
What owners say: Swimmers appreciate the accurate lap counting and heart rate data. Many note the bright display is easy to read in the pool, and the battery life lasts for long swimming sessions.
- Rugged design with water resistance to 100m
- Accurate swim metrics and GPS
- Large, bright display
- High price point
- Battery life shorter than dedicated sports watches
FORM Smart Swim Goggles
FORM Smart Swim Goggles offer a heads-up display (HUD) that shows heart rate, pace, distance, and other metrics directly in the goggle lens. They pair with a Polar H9 or H10 chest strap (sold separately) for heart rate. The goggles also provide real-time feedback and post-swim analysis via the FORM app.
What owners say: Swimmers say the HUD is a game-changer for pacing and staying in target zones. Some note the goggles can fog slightly and the battery life is adequate for most training sessions.
- Real-time heart rate in your view
- Helps maintain pace and effort
- Good app for post-swim analysis
- Requires separate Polar chest strap
- Goggles may fog occasionally
Garmin HRM-Pro Plus
The Garmin HRM-Pro Plus is a premium chest strap that works for swimming, running, and cycling. It stores swim data and transmits running dynamics like stride length and ground contact time. It is comfortable and easy to adjust, with a swim-proof design rated to 50 meters.
What owners say: Reviewers say it is very accurate in the pool and seamless with Garmin watches. They note the clip-on module makes strap replacement easy, and the battery lasts several months.
- Onboard storage for swim data
- Transmits running dynamics
- Comfortable and durable strap
- Expensive
- Some find strap band too short
How to choose
- Accuracy of Heart Rate Monitoring Underwater. The accuracy of a heart rate monitor in water depends on the type of sensor. Chest straps with ECG electrodes are generally more accurate than optical sensors because they are less affected by water pressure and movement. Look for models with proven swim-tracking features such as onboard storage or real-time transmission.
- Comfort and Fit During Swimming. A secure fit is crucial for uninterrupted heart rate tracking. Chest straps should have adjustable, non-slip bands that stay in place during flip turns. Armband monitors must be tight enough to prevent slippage without restricting movement. Sweat and water resistance also affect long-term comfort.
- Connectivity and Compatibility. Most swim heart rate monitors use Bluetooth or ANT+ to sync with watches, smartphones, or goggles. Ensure the monitor is compatible with your existing devices. Some models offer dual connectivity, allowing connection to multiple devices simultaneously, which is useful for triathletes.
- Water Resistance Rating. For swimming, a water resistance rating of at least 50 meters is recommended. This ensures the device can handle pool depths and open water conditions. Some monitors are rated for 100 meters, providing extra durability for long sessions and frequent use.
- Battery Life and Storage Options. Consider how long the battery lasts and whether the monitor has onboard storage. Chest straps with replaceable batteries can last months, but rechargeable models may need weekly charging. Onboard storage allows you to record heart rate data without a watch nearby, ideal for pool laps.
Frequently asked questions
Do I need a special heart rate monitor for swimming?
Yes, because most standard heart rate monitors are not waterproof or lose signal underwater. Swimming-specific monitors are designed to withstand water pressure, provide accurate readings, and often store data for later sync.
Can I use my Apple Watch to monitor heart rate while swimming?
Yes, the Apple Watch Series 4 and later (including Ultra) are swim-proof and record heart rate during swims. Optical sensors work well, but accuracy may be slightly lower than a chest strap during high intensity.
Are chest straps more accurate than optical sensors for swimming?
Generally, yes, chest straps with ECG electrodes provide more accurate heart rate data in water because they directly measure electrical signals. Optical sensors can be affected by water pressure and motion artifacts.
How do I sync a swim heart rate monitor with my watch?
Most monitors use Bluetooth or ANT+ to pair with compatible watches. You need to put the monitor in pairing mode and follow the watch's instructions. Some monitors store data and sync automatically after the swim.
What is the best budget heart rate monitor for swimming?
The Scosche RHYTHM+ is a solid budget-friendly option with good water resistance and armband design. For a cheaper chest strap, the Polar H9 offers similar accuracy to the H10 but with fewer features.
Can I use a swim heart rate monitor for open water swimming?
Yes, many monitors are rated to 50 meters or more, making them suitable for open water. However, for GPS tracking you will need a watch or device that supports open water swimming. Some monitors like the FORM goggles provide real-time feedback in open water.
The verdict
For most swimmers, the Garmin HRM-Swim is the top choice due to its reliable onboard storage and accuracy in the pool. If you prioritize peak accuracy and compatibility with smart goggles, the Polar H10 is an excellent alternative. For triathletes who want a versatile monitor for all three disciplines, the Wahoo TICKR X offers great value and features.
Video Guide
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