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 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.

The Garmin Forerunner 55 is a solid choice for anyone looking for an easy-to-use triathlon watch that effectively covers the essentials across multiple sports. It stands out with its impressive battery life, lasting up to two weeks in smartwatch mode and around 20 hours with GPS active. This feature is particularly advantageous for long training sessions or races. The GPS accuracy is reliable, ensuring that your distance and pace tracking are precise, which is crucial for athletes monitoring their performance.