Garmin Forerunner 255

About Garmin Forerunner 255

The Garmin Forerunner 255 is the perfect running smartwatch for athletes looking to push their limits and optimize performance. With up to 14 days of battery life, advanced training metrics, and built-in triathlon and multisport profiles, it helps you train smarter and recover faster. Personalized coaching, daily suggested workouts, and race preparation tools keep you on track for your next PR. Whether you're a seasoned competitor or leveling up your training, the Forerunner 255 gives you the insights, endurance, and precision you need to run at your best.

Elevate Your Running Performance

You’re ready to take the next step in your running journey. The Forerunner 255 provides advanced training and recovery insights to help you achieve your personal best.

• Receive a personalized Morning Report with sleep, HRV, recovery, and weather data to start your day informed.
• Enjoy extended battery life with up to 14 days in smartwatch mode and 30 hours in GPS mode—so you can train longer, charge less.
• Access built-in triathlon features and 30+ activity profiles to push your limits across multiple sports.
• Plan your race strategy with the Race Widget, which displays course details and daily suggested workouts.
• Utilize a comprehensive suite of advanced metrics and training tools to fine-tune your performance.
• Make secure, contactless payments for post-workout fuel using Garmin Pay.

Ultra-Light Comfort and Durable Design

You run longer and feel lighter with a design that barely weighs on your wrist. The sleek, feather-light Forerunner 255 ensures comfort without compromising on performance.

• Weighs only 1.7 oz for an almost weightless feel, even during sleep.
• Constructed with sweat-ready materials, including easy-to-use buttons, a durable silicone band, and Corning® Gorilla® Glass 3 for a robust, long-lasting design.

Kickstart Your Day with Actionable Insights

You get a powerful overview of your health and readiness every morning. Customized insights help you determine whether to push hard or take it easy.

• Morning Report provides a snapshot of sleep quality, recovery, and daily workout outlook.
• HRV Status offers deeper insight into your overall health and training readiness through heart rate variability monitoring while you sleep.

Comprehensive Sports and Activity Tracking

You have a full arsenal of built-in sports apps that let you track and transition seamlessly between activities. Whether you’re running a race or completing a brick workout, your watch adapts to your routine.

• Access over 30 built-in activity profiles including triathlon and open-water swimming.
• Switch between sports with a single button press for effortless transition during races and brick workouts.

Personalized Coaching and Adaptive Workouts

You train smarter with tailored guidance that evolves with your progress. Personalized coaching and daily workout suggestions keep you on target for your goals.

• Garmin Coach provides dynamic training plans for running, cycling, and strength workouts.
• Daily Suggested Workouts adjust based on your performance, recovery, and upcoming races.
• Adaptive plans are available for building muscle, increasing endurance, or boosting overall fitness.

Optimize Running Efficiency and Power

You fine-tune your running technique with advanced metrics that help you manage effort and improve form. Real-time feedback guides you to optimize every stride.

• Wrist-Based Running Dynamics measure cadence, stride length, and ground contact time.
• Wrist-Based Running Power quantifies the effort you apply to your run without needing extra sensors.
• PacePro™ feature provides GPS-based pace guidance to help you maintain a strategic pace over varied terrain.
• Grade-Adjusted Pace helps you adjust your speed over hills to avoid burning out too early.

Advanced Training Metrics for Peak Performance

You track every aspect of your training with metrics that inform your progress and help you reach new performance levels.

• Recovery Time insights let you know when you’re ready for the next high-effort workout by considering overall stress, sleep, and daily activity.
• Training Status provides an overview of whether you’re training productively, peaking, or overreaching based on recent exercise history and HRV data.
• Acute Load and Training Effect metrics show how recent workouts compare to optimal intensity ranges and their impact on endurance, speed, and power.
• Performance Condition offers real-time analysis of pace and heart rate during runs for immediate feedback.

Intelligent Course and Race Planning

You never run out of places to go. Create, sync, and track courses effortlessly, and use visual race predictors to plan your strategy and gauge your potential pace.

• Create or sync courses from Garmin Connect or third-party platforms like Strava and Komoot.
• Track Running records lap distances accurately with a database of over 10,000 tracks worldwide.
• Visual Race Predictor estimates your potential pace for distances from 5K to marathon, highlighting training trends over time.

Cross-Training and Adaptive Coaching for Cycling

You diversify your training. Mix up your routine with downloadable HIIT, strength, cardio, yoga, and Pilates workouts, or take advantage of adaptive coaching for cycling to meet your specific performance goals.

• Download free cross-training workouts directly to your watch from the Garmin Connect app.
• View adaptive cycling workouts that adjust based on your performance and upcoming event demands.

A Wealth of Wellness Insights

You understand your body and recovery with a comprehensive suite of wellness tracking features. Monitor your heart, sleep, energy, and stress levels to optimize every aspect of your health.

• Continuous wrist-based heart rate monitoring alerts you to abnormal levels during rest and activity.
• Body Battery™ Energy Monitoring tracks your energy reserves throughout the day for optimal activity timing.
• Sleep Coach offers personalized sleep insights and a detailed sleep score along with breakdowns of your sleep stages.
• Nap Detection automatically logs your naps to help you understand their benefits.
• Pulse Ox Sensor monitors blood oxygen saturation to support advanced sleep tracking and altitude acclimation.
• Women’s Health Tracking allows you to monitor menstrual cycles or pregnancy for personalized wellness insights.
• Intensity Minutes show you when and how you earn vigorous activity throughout your day.
• Stress Tracking and Relaxation Reminders prompt you to take breathing breaks when needed.
• Health Snapshot Feature records key health stats in a quick, shareable 2-minute session.

Stay Connected and Safe Everywhere You Go

You remain connected and secure with integrated smart features that keep you informed, safe, and engaged with your community.

• SatIQ™ Technology ensures precise positioning and optimizes battery life in any environment.
• Garmin Pay lets you make secure, contactless payments effortlessly.
• Smart Notifications deliver emails, texts, and alerts directly on your watch—respondable on Android devices.
• Safety and Tracking features automatically send your location to emergency contacts when needed.
• LiveTrack enables friends and family to follow your real-time location and preplanned course.
• The Garmin Connect App consolidates all your health, fitness, and activity data, allowing you to connect, compete, and share with others.
• Customize your device further with apps and watch faces from the Connect IQ™ Store.