Running Smartwatch
The Garmin Forerunner 255, is a high-performance GPS multisport smartwatch tailored for runners and athletes seeking advanced training tools without the premium price tag. Available in 41 mm and 46 mm sizes, it sports a vibrant 1.1″ or 1.3″ sunlight-readable Memory‑in‑Pixel (MIP) display with Gorilla Glass coverage for excellent outdoor visibility. Under the hood it offers multi-band GPS (GPS/GLONASS/Galileo), a barometric altimeter, compass, and Garmin’s 4th‑gen optical heart-rate sensor, delivering high accuracy and reliable tracking for varied environments. For runners, features like PacePro, race prediction, stamina insight, and Garmin Coach adaptive training plans stand out—while its multisport support covers triathlon transitions, swimming, cycling, strength, and more . Health monitoring is comprehensive: 24/7 HR, HRV sleep tracking, Pulse Ox, Body Battery, stress tracking, and the signature Morning Report summarize your readiness for the day. Despite packed features, battery life is impressive—up to 14 days in smartwatch mode and up to 30 hours in GPS mode (about 16 hours when using multi-band GPS), and on-par performance for long sessions.
Key Features
Multi-Band GPS for Superior Accuracy
The Forerunner 255 features multi-band GNSS support, including GPS, GLONASS, and Galileo. This enables highly accurate tracking even in challenging environments like dense forests or tall buildings, making it ideal for serious runners and triathletes who train across varied terrain.
Advanced Training & Performance Tools
Designed for performance-driven athletes, the watch includes PacePro pacing strategies, race time predictions, and real-time stamina tracking. It also supports triathlon and multisport profiles with seamless activity transitions, giving you the tools you need to train smarter and race stronger.
Comprehensive Health Monitoring
With 24/7 heart rate tracking, HRV status, Pulse Ox, Body Battery, stress tracking, and advanced sleep insights, the Forerunner 255 offers a full suite of health and wellness features. It helps you understand your recovery and readiness, with personalized Morning Reports summarizing your daily condition.
Long Battery Life with Smart Efficiency
Despite its powerful feature set, the Forerunner 255 delivers excellent battery performance. It offers up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode, or about 16 hours with multi-band GPS active—keeping up with your longest workouts and daily routines.
Smart Features for Everyday Convenience
The Forerunner 255 includes Garmin Pay for contactless payments, music storage and playback (in the Music edition), smart notifications, and safety features like LiveTrack and incident detection. Whether you’re training or running errands, it blends fitness functionality with everyday convenience.
What’s in the Box
- Forerunner 255
- Charge/data cable
- Documentation
FAQs
What is the difference between the Forerunner 255 and 255S?
The Forerunner 255 comes in two sizes: 255 (46mm) and 255S (41mm). Both have identical features and specs, but the 255S is more compact and lightweight, better suited for smaller wrists.
Does the Forerunner 255 support music playback?
Yes—but only on the Music Edition. The Forerunner 255 Music supports Wi-Fi, allows you to store up to 500 songs, and sync playlists from services like Spotify or Deezer. The standard version does not include music storage.
Can the Forerunner 255 be used for triathlon training?
Absolutely. It supports triathlon and multisport profiles, allowing for smooth transitions between swimming, cycling, and running activities in a single session—making it ideal for triathletes.
What’s the battery life of the Forerunner 255?
Battery life is excellent: up to 14 days in smartwatch mode, 30 hours in GPS-only mode, and 16 hours using multi-band GPS. The Music Edition offers around 6.5 hours of GPS with music playback.
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