Garmin Forerunner® 255
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Train effectively with advanced analysis and recovery data to keep your preparation under control and improve your PB.
Monitor your health status through sleep data, heart rate variability (HRV), and daily training tips, all in a single morning report screen.
Charge the device less often thanks to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode.
Push beyond your running goals with the triathlon sport profile or by choosing from over 30 different activities.
Plan your training strategy with daily tips, route details, and much more on the race widget.
Know your strengths and weaknesses through metric analysis and train more effectively to reach your goals.
Pay for your coffee or isotonic drink after training with the contactless system1 Garmin Pay™ built into the watch.
READY FOR NEW GOALS
Monitor your daily health and nighttime sleep thanks to a battery life of up to 14 days in smartwatch mode and up to 30 hours with GPS on.
LIGHTWEIGHT (ALMOST) AS A FEATHER
With its sleek design and weight of 49g, you will almost forget you are wearing the Forerunner® 255, even while you sleep.
SWEAT-RESISTANT MATERIALS
Equipped with easy-to-use buttons, Corning display® Gorilla® Glass 3 and a silicone strap, this watch is ready to accompany you on every experience.
MORNING REPORT
You can view an overview of your sleep, along with heart rate variability and weather conditions. You can also customize the report to show only what you want to see.
HRV STATUS
Gain deeper insight into your performance in terms of health, recovery, and training through FirstBeat Analytics technology™ that measures heart rate variability during sleep.
PRELOADED SPORT PROFILES
Choose from over 30 built-in activities, including triathlon and open water swim profiles, both new to the Forerunner 255 series. For combined races and workouts, switch to the next activity with the press of a single button.
ADAPTIVE TRAINING PLANS FOR RACES
Get ready for your next race, including the marathon, with training tips, personalized daily exercises, and race time predictions. Enter the race type and we will create a plan to help you reach your goals.
SUGGESTED DAILY WORKOUTS
View the full week of recommended daily workouts that adapt after each run based on your performance and recovery, as well as upcoming races in the Garmin Connect smartphone app calendar.™.
GARMIN COACH
The Training plans include training plans for 5K, 10K, and half marathons, with expert coach guidance tailored to you and your goals.
TRIATHLON AND MULTISPORT PROFILES
Automatically switch between sports using built-in profiles for triathlon, duathlon, combined workouts, and swimrun, so you can focus on the race and let your watch handle lap tracking. Plus, you can create your own custom multisport profiles.
WRIST-BASED RUNNING DYNAMICS
This smartwatch measures running metrics including cadence, stride length, ground contact time, and more.
WRIST-BASED RUNNING POWER
See how much power you’re applying on trail or road to manage your effort and optimize training. No accessories required.
RECOVERY TIME
Discover the recovery time before your next high-intensity workout, the forecast is based on your recent training as well as overall stress, sleep, and daily activities outside of workouts.
PACEPRO FEATURE™
To help you plan your race day strategy, this feature provides pace guidance based on the selected course or distance, so you can calibrate your effort and finish within your target time.
ADJUSTED AVERAGE PACE BY GRADE
Don’t run out of energy before your activity is over. After setting up data fields in your running activity, see how to adjust your pace on different terrains to achieve your expected performance.
TRAINING STATUS
Using new indicators like heart rate variability status, your workout history, and recent performance, you’ll get detailed insights into your overall effort and know if your training is productive, light, or too intense.
ACUTE LOAD
View your workout history and compare the intensity of your recent exercises with the optimal range to improve your fitness.
TRAINING EFFECT
Discover how workouts affect your endurance, speed, and power with the training effect divided between aerobic and anaerobic activity.
PERFORMANCE CONDITION
During your run, get pace and heart rate analysis for real-time evaluation of your performance.
ROUTES
Create or find existing routes in the Garmin Connect app so you never run out of new paths to explore. Alternatively, plan them on other platforms like Strava and Komoot, then sync them automatically to your Forerunner.
TRACK RUNNING
Accurately records lap distances, even on a track you've never run before, with a database of over 10,000 tracks (400 meters) worldwide.
RACE PREDICTOR
Based on your running history and overall fitness level, get a pace prediction for 5K, 10K, or even marathons. Trend charts also highlight training impact over time.
CROSS-TRAINING
Combine your training with different inputs including high-intensity interval training, endurance, cardio, yoga, and Pilates—all free profiles preloaded on the watch; or download others from the Garmin Connect app.
TARGETED ADAPTIVE COACHING
View the full week of daily suggested cycling workouts in the smartphone app calendar Garmin Connect™They adapt to your performance and the requirements of upcoming races.
Wellness tracking
WRIST HEART RATE
The smartwatch constantly records your heart rate2 with our latest generation sensor, which will alert you if your heart rate stays too high or too low while resting. It also measures activity intensity, even while swimming.
BODY BATTERY™
Check your energy levels Optimize your body's energy reserves by considering heart rate variability, stress, sleep, and other data to know when you're ready for activity or need to rest.
SLEEP COACH
A personalized coach that shows your sleep needs and how to improve. Use these tips to find the right balance between intense activity and your body's natural recovery process.2.
NAP DETECTION
Automatically monitors or records your daytime naps to discover their benefits for your body and understand the ideal timing and duration.
PULSE OX SENSOR
The pulse ox sensor3 monitors blood oxygen saturation levels to provide advanced sleep analysis and altitude acclimation data.
FEMALE HEALTH MONITORING
Use the Garmin Connect app to track your cycle menstrual or the pregnancy. Track symptoms, get exercise and nutrition advice right on your wrist.
MINUTES OF INTENSITY
Indicates when you have accumulated minutes of intense activity and at what time during the day.
STRESS TRACKING
Find out if your day is calm, balanced, or stressful. Relaxation reminders invite you to do short breathing exercises when the watch detects a stressful condition.
HEALTH SNAPSHOT FEATURE™
With a 2-minute session you can record key stats like heart rate2 and its variation, Pulse Ox3, breathing, and stress. This way you get a report with key statistics to share via the Garmin Connect app™ on your compatible smartphone.
Stay connected at all times
SATIQ TECHNOLOGY™
Multiband GNSS with SatIQ technology ensures the best location accuracy in any environment while optimizing device battery life.
CONTACTLESS PAYMENTS WITH GARMIN PAY
Make your payments secure, easy, and fast with the contactless solution1 Garmin Pay only processes the enabled providers.
SMART NOTIFICATIONS
Receive emails, SMS, and push notifications directly on the watch if paired with Apple smartphone® or Android™. You can also reply to messages if you have an Android phone.
SAFETY AND TRACKING FEATURES
If you feel unsafe or if the watch detects a fall, assistance and incident detection features4 send your location to emergency contacts. Incident detection is enabled only for selected activity profiles.
LIVETRACK FUNCTION
Use LiveTrack to allow friends and family to follow your real-time location4 and view the entire planned route in advance. Make sure your loved ones know exactly where you are running.
GARMIN CONNECT APP
Check your health and fitness information, connect and compete with friends, join challenges to earn badges; all in one free app.
CONNECT IQ™ STORE
Download custom watch faces, add data fields, and download apps and widgets from Connect the IQ Store app downloaded on your compatible smartphone.
General |
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| BAND MATERIAL | Silicone |
|---|---|
| LENS MATERIAL | Corning® Gorilla® Glass 3 |
| BEZEL MATERIAL | Reinforced polymer fiber |
| QUICK RELEASE BANDS | Yes (22 mm, Industry standard) |
| CASE SIZE | 45.6 x 45.6 x 12.9 (mm) Fits wrists with a circumference of 130-205 mm |
| WEIGHT | 49 g |
| DISPLAY SIZE | 33 mm (1.3") diameter |
| DISPLAY RESOLUTION | 260 x 260 pixels |
| COLOR DISPLAY | |
| LARGE FONT OPTION | |
| BATTERY LIFE | Smartwatch mode: up to 14 days GNSS GPS-only mode: up to 30 hours GNSS all-systems mode: up to 25 hours GNSS all-systems multi-band mode: up to 16 hours |
| CHARGING METHOD | Garmin proprietary charger |
| MEMORY/HISTORY | 4 GB |


