10 Best Triathlon Watches 2025 in the United States

The Apple Watch Series 10 is a versatile smartwatch that suits many fitness activities, including triathlon training. It offers a bright, larger screen with a lightweight and comfortable design, making it easy to wear all day and during workouts. The watch’s water resistance up to 50 meters means it’s safe for swimming, an essential feature for triathletes. Its GPS supports multiple satellite systems for accurate tracking of your routes in running, cycling, and swimming. Heart rate monitoring is advanced, including ECG capabilities and notifications for irregular heart rhythms, which can be useful for closely monitoring your performance and health.

The Fitbit Versa 4 is a solid fitness watch that offers a good range of features useful for triathletes, especially those who want a versatile device for training and everyday use. Its built-in GPS tracks your routes accurately during runs, rides, and swims, while the 24/7 heart rate monitoring helps keep an eye on your effort levels. You get over 40 exercise modes, including automatic exercise detection, which supports multisport workouts, a must-have for triathlon training. The watch is water resistant up to 50 meters, so it can handle swimming sessions without worry. Battery life lasts around 6 days, which is convenient for long training cycles without frequent recharging. The Fitbit also provides useful recovery insights with its Daily Readiness Score, helping you know when to push hard or rest.

The Garmin Forerunner 265 is a strong choice for triathletes thanks to its bright 1.3-inch AMOLED display and a comfortable, lightweight design. It offers solid battery life, lasting up to 13 days in regular smartwatch mode and around 20 hours with GPS active, which is great for long training sessions or races. Its multi-band GNSS with SatIQ technology improves GPS accuracy, especially in tricky environments, helping you track runs, cycling, and open-water swims more reliably.