10 Best Triathlon Watches 2025 in the United States

The Apple Watch Series 11 (GPS 46mm) offers a sleek and lightweight design that’s comfortable for all-day wear, including during exercise and sleep tracking. With water resistance up to 50 meters and dust resistance rated IP6X, it can handle swimming and outdoor workouts well, making it suitable for triathletes. The built-in GPS supports multiple satellite systems, ensuring reliable and accurate tracking of your routes and pace, which is crucial for training and race-day performance. Heart rate monitoring is advanced, with both optical and electrical sensors providing real-time data, plus alerts for irregular rhythms and high or low heart rates. This helps you keep your training in safe and effective zones.

The watch supports multiple workout types and offers additional fitness insights, but it doesn’t have a dedicated multisport triathlon mode that automatically switches between swim, bike, and run segments like some specialized triathlon watches do. Battery life lasts about 24 hours with normal use, which covers a long training day but might require careful management during ultra-long events. Fast charging helps a bit there. Connectivity options, including Bluetooth 5.3, Wi-Fi, and 5G/LTE (on cellular models), keep you linked to your iPhone and apps for notifications, music, and emergency features like crash detection and SOS.

Its durability is improved with a scratch-resistant glass face and robust build, though it remains primarily a smartwatch rather than a rugged sports watch. For those wanting a device that combines everyday smart features with solid fitness tracking and health monitoring, the Apple Watch Series 11 is an excellent choice. Triathletes seeking more specialized multisport functionality and longer battery life might want to consider watches designed specifically for endurance sports.

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.