10 Best Heart Rate Monitor For Swimming 2025 in the United States

The KEEPONFIT Smart Watch offers a solid option for those wanting a heart rate monitor that works while swimming. Its IP68 waterproof rating means it can handle swimming pools, showers, and hand washing without worry. However, it’s not designed for hot water or saltwater activities like diving or sauna use, so keep that in mind if you swim in the ocean or want to track in hot baths.

The watch tracks heart rate continuously using advanced sensors, along with blood oxygen levels and sleep patterns, providing a rounded view of your health. With over 100 sports modes, including swimming, it’s versatile enough for many activities beyond the pool. The 1.27-inch touch screen is comfortable and clear, and the watch’s lightweight design helps it stay comfortable on your wrist during workouts. The battery life supports regular use but will require recharging depending on usage intensity. Connectivity is strong via Bluetooth, syncing well with Android and iPhone devices, and it even allows making and receiving calls directly from the watch — a handy extra feature.

This smartwatch is well suited for casual swimmers and fitness enthusiasts who want a multipurpose device with health tracking and call functionality. While the heart rate data is reliable for general use, it may not match the precision of chest strap monitors during vigorous swimming. It is less appropriate for serious swimmers needing professional-level accuracy or deep-water use.

The Polar H10 is a chest strap heart rate monitor known for its excellent accuracy, often regarded as one of the most precise sensors available. It’s fully waterproof, making it suitable for swimming and other water activities. The strap is designed for comfort with improved electrodes, silicone dots to prevent slipping, and an easy buckle, which helps it stay securely in place during workouts. Its battery lasts up to 400 hours and uses a common CR2025 button cell battery, reducing the need for frequent changes.

Connectivity options are versatile, supporting Bluetooth, ANT+, and even simultaneous connections to multiple devices like smartphones and fitness equipment, increasing convenience for users who want to track their data across platforms. It is compatible with various devices including desktops, laptops, and tablets. The monitor also has internal memory to store data temporarily when not connected.

Since it’s a chest strap, some swimmers might find it less comfortable compared to wrist-based monitors, especially for longer sessions. Additionally, the lack of an integrated screen means users will need to rely on a connected device to view their heart rate in real time. This model fits smaller sizes (XS-S), and larger sizes are not covered. The Polar H10 is well-suited for swimmers seeking highly accurate heart rate tracking with reliable waterproofing and strong connectivity, though users preferring a wristband or built-in display might consider other options.

The FITVII FINO 2 is a sleek and lightweight fitness tracker boasting an IP68 waterproof rating, which means it can handle being submerged in water and is generally suitable for swimming. Its 24/7 heart rate tracking and blood oxygen monitoring provide continuous health data, which is useful for swimmers wanting to monitor their heart rate during workouts. The watch offers comprehensive health insights including sleep and blood pressure monitoring, along with multiple sport modes. Data syncs via Bluetooth to an app compatible with both Android and iOS, making it easy to review your stats. The 1.45-inch color touchscreen is bright and responsive, and the device is comfortable to wear thanks to its slim design. Battery life is decent, though very long swims might require charging nearby. While it provides accurate step counting and calorie tracking, users should note that wrist-based heart rate sensors can sometimes be a little less precise during vigorous water activity compared to chest straps.

Additional handy features include notifications, sedentary reminders, and customizable watch faces, which add convenience but don’t impact swimming performance. The FITVII FINO 2 represents a good option for casual swimmers seeking an affordable, waterproof fitness tracker with solid heart rate monitoring and broad health tracking features. However, serious swimmers might miss specialized swim metrics and potentially more precise heart rate sensors.