10 Best Triathlon Training Watches 2025 in the United States

The Garmin Forerunner 165 Music is a solid choice for triathlon training thanks to its multisport capabilities and accurate built-in GPS, which help track your pace and distance across various activities like running and cycling. Its wrist-based heart rate monitor provides useful fitness insights, while the lightweight 43 mm design with a bright AMOLED touchscreen makes it comfortable and easy to check stats on the go. Battery life is impressive, lasting up to 11 days in smartwatch mode and around 19 hours when using GPS, which should cover long training sessions and races. Water resistance is included, making it suitable for swim training.

The watch shines with personalized training guidance and recovery features—daily workout suggestions adjust based on how you’re performing and recovering, which is great for balanced training. Music storage and phone-free playback add convenience, especially during workouts. Connectivity with smartphones is smooth, offering notifications and safety features like incident detection that can send your location to emergency contacts. Build quality is durable enough for an active lifestyle, and the Garmin Pay feature lets you make contactless payments on the go.

While the heart rate and GPS tracking are reliable, the watch might lack some advanced triathlon-specific metrics found in higher-end models, and music streaming requires a paid subscription. Also, the battery capacity is modest compared to some competitors, so heavy GPS use will drain it faster. For triathletes seeking a user-friendly, versatile watch with good training support and smart features without overwhelming complexity, this model is a practical pick.

The Garmin Forerunner 265S is a lightweight and stylish triathlon training watch, designed especially for smaller wrists with its 42mm size and bright AMOLED touchscreen. It supports over 30 sports profiles including triathlon, running, cycling, and open-water swimming, making it versatile for multisport athletes. GPS accuracy is enhanced by multi-band GNSS and SatIQ technology, which helps maintain precise tracking even in tricky environments while also saving battery.

Heart rate monitoring is detailed and ties into useful recovery and training readiness insights—like your morning report and adaptive daily workouts—that adjust based on your performance and rest. This smartwatch offers solid battery life, lasting up to 15 days in regular mode and around 24 hours during continuous GPS use, covering long training sessions and races. It also includes safety features like incident detection, which require your phone to be nearby with network coverage. Connectivity is strong with Bluetooth, Wi-Fi, and smart notifications compatible with both Android and Apple devices.

The build feels durable for active use and is water-resistant, suitable for swimming and sweat-heavy workouts. Many of the advanced training metrics work best when paired with the Garmin Connect app, providing comprehensive training guidance. This makes the watch a feature-packed device that balances performance tracking and comfort, ideal for triathletes seeking in-depth training insights without bulky gear.

The Garmin Forerunner 265 is a strong choice for triathlon training thanks to its 30+ built-in sport profiles, including running, cycling, and open-water swimming, making it versatile for all three triathlon disciplines. Its multisport mode lets you switch seamlessly between activities during training or races. The watch shines with its accurate multi-band GNSS GPS and SatIQ technology, offering reliable location tracking even in tricky environments, which is crucial for outdoor training.

Heart rate monitoring and advanced recovery insights, like training readiness and HRV status, help you understand your body's condition and optimize workouts without overtraining. The 1.3-inch colorful AMOLED touchscreen combined with traditional buttons ensures easy interaction in any conditions. Battery life is solid, lasting up to 13 days in smartwatch mode and about 20 hours with GPS active, which should cover long training sessions or races comfortably. Water resistance supports open-water swims, essential for triathletes. Smart features like notifications, music control, and Garmin Pay add convenience but depend on smartphone connectivity. A minor downside is that some safety features require your phone nearby with network coverage, which might limit their use in remote areas.

The watch’s lightweight and durable design make it comfortable to wear all day, but the 46 mm size might feel bulky on smaller wrists. The Forerunner 265 delivers a balanced mix of accurate tracking, useful training insights, and everyday smart features, making it a strong option for triathletes who want detailed data and practical usability.