10 Best Triathlon Watches 2025 in the United States

The Apple Watch SE 3 (44mm GPS) is a solid choice for those interested in a versatile multisport smartwatch, including triathletes who want a reliable fitness partner. It offers good battery life with about 18 hours of use and fast charging, which is convenient for daily tracking and quick turnarounds between workouts. Its GPS capabilities include support for multiple satellite systems (L1 GPS, GLONASS, Galileo, QZSS), which helps with accurate location tracking during swims, bikes, and runs. The heart rate sensor is advanced, providing high and low heart rate alerts and irregular rhythm notifications, contributing to safety during intense training. While it tracks a variety of workouts and offers an always-on display for easy data viewing, it does not have a specialized multisport mode that automatically switches between activities, which some dedicated triathlon watches provide.

Water resistance is suitable for swimming, but it’s not designed for deep-water or prolonged submersion activities. Durability is enhanced with crack-resistant Ion-X glass and an aluminum case, making it fairly sturdy for everyday use. Its connectivity options (Bluetooth 5.3, Wi-Fi) keep you connected with your iPhone for calls, messages, and music, but cellular connectivity requires a higher-tier model.

The Apple Watch SE 3 effectively combines fitness tracking with smart features, though triathletes seeking more specialized, rugged devices with longer battery life might find it somewhat limited.

The Apple Watch SE 3 is a solid choice for triathletes who want a smartwatch that covers most essential needs without overwhelming complexity. Its battery life offers about 18 hours of use, which should get you through most training days but might require charging before longer events. The watch is water resistant, making it suitable for swimming and transitions in triathlons. It features built-in GPS with multiple satellite systems (L1 GPS, Galileo, QZSS) that provide good location accuracy for running and cycling routes.

Heart rate monitoring is reliable with a second-generation optical sensor and supports alerts for unusual heart rates, which is helpful for tracking your fitness and health. It also supports multisport workouts, though it may not have advanced triathlon-specific data fields that dedicated triathlon watches offer. The always-on display helps you check your stats easily during activities without raising your wrist. In terms of durability, the aluminum case and crack-resistant front glass offer reasonable protection for everyday and sports use, but this watch may not be as rugged as some specialized triathlon models built for extreme conditions.

Connectivity is strong with Bluetooth 5.3, Wi-Fi, and seamless integration with iPhone, allowing you to stay connected for notifications, music, and calls during workouts. The Apple Watch SE 3 is well suited for triathletes seeking a versatile, user-friendly fitness watch with good health tracking and smart features. However, athletes looking for longer battery life or more specialized triathlon metrics might find it somewhat limited.

The Apple Watch SE 3 is a versatile smartwatch that offers solid features for fitness enthusiasts, including those interested in triathlon training. Its battery life supports about 18 hours of typical use, which should get you through a full day but may require daily charging if used heavily. The watch includes built-in GPS with support for multiple satellite systems (L1 GPS, GNSS, Galileo, QZSS), providing reliable location tracking for outdoor activities like running and cycling. Heart rate monitoring is well-covered with notifications for high, low, or irregular rhythms, and the second-generation optical sensor improves accuracy during workouts.

Multisport modes are available through the Workout app, which tracks various exercises and provides real-time metrics, although it’s more general than some specialized triathlon watches that automatically switch between swimming, cycling, and running segments. Water resistance is included, making it suitable for swimming, but Apple doesn’t specify a dive rating, so it’s best for surface swims rather than deep water. The watch is built with durable materials including crack-resistant glass and an aluminum case, good for active use but less rugged than some dedicated triathlon models designed for rough conditions.

Connectivity is excellent with fast Bluetooth 5.3, Wi-Fi, and LTE options, allowing you to stay connected without your phone nearby. Features like the always-on display and fast charging add convenience for daily wear and quick power-ups. While the Apple Watch SE 3 excels at fitness tracking and smartwatch functions, triathletes looking for advanced multisport transitions and longer battery life during extended races might want to consider specialized triathlon watches. It remains a strong choice for those who want a capable, stylish smartwatch that supports a broad range of health and fitness tracking with seamless iPhone integration.