Garmin Forerunner 255

READY FOR THE LONG RUN
Get an uninterrupted picture of your daily health and nightly sleep with up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode.

(ALMOST) AS LIGHT AS A FEATHER
With its sleek design and 49g weight, you'll almost forget you're wearing a Forerunner® 255 running smartwatch — even when you're asleep.

SWEAT-READY MATERIALS
Featuring easy-to-use buttons and a silicone band, this watch is ready to wear — and tear — with durable Corning® Gorilla® Glass 3.

MORNING REPORT
Receive an overview of your sleep, recovery and training outlook as soon as you wake up — alongside HRV status and weather. You can even customise your report to show you what you want to see.

HRV STATUS
Gain a deeper understanding of your overall health, recovery and training performance through heart rate variability while you sleep, based on technology developed by our Firstbeat Analytics™ team.

BUILT-IN SPORTS APPS
Tap into 30+ built-in activities, including the triathlon and open-water swimming profiles — new to the Forerunner 255 running watch series. For races and brick workouts, transition to the next activity with a single button press.

RACE WIDGET
Get ready for your next race with training tips, personalised daily suggested workouts and completion time predictions based on course details, weather and performance.

DAILY SUGGESTED WORKOUTS
View your entire week of daily suggested workouts, which adapt after every run to match your performance and recovery as well as the races coming up in your Garmin Connect™ smartphone app calendar.

GARMIN COACH
Free adaptive training plans include 5K, 10K and half-marathon programmes, featuring guidance from expert coaches that adapt to you and your goals.

TRIATHLON AND MULTISPORT PROFILES
Switch between sports with one press by using built-in profiles for triathlons, duathlons, brick workouts and swimruns. Or, create your own custom multisport profiles.

RUNNING POWER
When using a Running Dynamics Pod or HRM-Pro™ heart rate monitor, get a continuous measurement on your wrist of how much power you're applying to the road as you run, so you can manage your effort.

RUNNING POWER
When using a Running Dynamics Pod or HRM-Pro™ heart rate monitor, get a continuous measurement on your wrist of how much power you're applying to the road as you run, so you can manage your effort.

RECOVERY TIME
Know how long to recover before your next high-effort workout based on your latest 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 offers GPS-based pace guidance for a selected course or distance, so you can tailor your efforts to what's ahead.

TRAINING STATUS
Using new indicators such as HRV status, your recent exercise history and performance, get an easy insight into your overall effort — and whether you're training productively, peaking or strained.

ACUTE LOAD
See your training history, and compare the intensity of your recent workouts to the optimal range to help improve your fitness.

TRAINING EFFECT
See how your workouts influence your endurance, speed and power with aerobic and anaerobic training effect feedback.

PERFORMANCE CONDITION
While you run, get an analysis of your pace and heart rate for a real-time assessment of your current ability to perform.

RUNNING DYNAMICS
When using a Running Dynamics Pod or HRM-Pro heart rate monitor, the Forerunner 255 running watch measures crucial running metrics such as cadence, stride length, ground contact time and balance, and more — while comparing to others in the Garmin Connect app.

COURSES
Create or find existing courses in the Garmin Connect app, so you'll never run out of places to run. Or plan one on other platforms such as Strava and Komoot, then automatically sync them to your Forerunner.

TRACK RUNNING
Ready for some speedwork? Input your lane on the built-in track run activity to record accurate lap distances and see your distances in metres.

VISUAL RACE PREDICTOR
Based on your running history and overall fitness level, get an estimate of what your pace could be for a 5K, 10K — or even a marathon. Plus, trend data highlights your training's impact over time.

CROSS-TRAINING
Mix up your training with different types of workouts. Free HIIT, strength, cardio, yoga and Pilates workouts come preloaded on the watch, and you can download more from the Garmin Connect app.

LENS MATERIAL: Corning® Gorilla® Glass 3
BEZEL MATERIAL: Fibre-reinforced polymer
QUICK RELEASE BANDS: Yes (22 mm, Industry standard)
STRAP MATERIAL: Silicone
PHYSICAL SIZE: 45.6 x 45.6 x 12.9 (mm)
Fits wrists with a circumference of 130-205 mm
COLOUR DISPLAY
DISPLAY SIZE: 1.3" (33 mm) diameter
DISPLAY RESOLUTION: 260 x 260 pixels
DISPLAY TYPE: Sunlight-visible, transflective memory-in-pixel (MIP)
WEIGHT: 49 g
BATTERY LIFE: Smartwatch mode: up to 14 days
GPS-Only GNSS mode: Up to 30 hours
All-Systems GNSS mode: Up to 25 hours
All-Systems GNSS mode plus Multi-Band: Up to 16 hours
See details
WATER RATING: 5 ATM
MEMORY/HISTORY: 4 GB


Clock features
TIME/DATE
GPS TIME SYNC
AUTOMATIC DAYLIGHT SAVING TIME
ALARM CLOCK
TIMER
STOPWATCH
SUNRISE/SUNSET TIMES

Health monitoring
WRIST-BASED HEART RATE (CONSTANT, EVERY SECOND)
DAILY RESTING HEART RATE
ABNORMAL HEART RATE ALERTS: Yes (high and low)
RESPIRATION RATE (24X7)
PULSE OX BLOOD OXYGEN SATURATION: Yes (spot-check, and optional all-day acclimation and in sleep)
FITNESS AGE
BODY BATTERY™ ENERGY MONITOR
ALL-DAY STRESS TRACKING
RELAXATION REMINDERS
RELAXATION BREATHING TIMER
SLEEP: Yes (Advanced)
SLEEP SCORE AND INSIGHTS
HYDRATION: Yes (in Garmin Connect™ and optional Connect IQ™ widget)
WOMEN'S HEALTH: Yes (in Garmin Connect™ and optional Connect IQ™ widget)
HEALTH SNAPSHOT

Sensors
GPS
GLONASS
GALILEO
MULTI-FREQUENCY POSITIONING
GARMIN ELEVATE™ WRIST HEART RATE MONITOR
BAROMETRIC ALTIMETER
COMPASS
GYROSCOPE
ACCELEROMETER
THERMOMETER
PULSE OX BLOOD OXYGEN SATURATION MONITOR

Daily smart features
CONNECTIVITYBluetooth®, ANT+®
CONNECT IQ™ (DOWNLOADABLE WATCH FACES, DATA FIELDS, WIDGETS AND APPS)
ON-DEVICE CONNECT IQ™ STORE
SMART NOTIFICATIONS
TEXT RESPONSE/REJECT PHONE CALL WITH TEXT (ANDROID™ ONLY)
CALENDAR
WEATHER
REALTIME SETTINGS SYNC WITH GARMIN CONNECT™ MOBILE
BATTERY SAVER - CUSTOMISABLE LOW POWER WATCH
CONTROLS SMARTPHONE MUSIC
FIND MY PHONE
FIND MY WATCH
VIRB® CAMERA REMOTE
SMARTPHONE COMPATIBILITY: iPhone® and Android™
COMPATIBLE WITH GARMIN CONNECT™ MOBILE
GARMIN PAY™

Safety and tracking features
LIVETRACK
LIVE EVENT SHARING: Android™ Only
INCIDENT DETECTION DURING SELECT ACTIVITIES
ASSISTANCE

Activity tracking features
STEP COUNTER
MOVE BAR (DISPLAYS ON DEVICE AFTER A PERIOD OF INACTIVITY; WALK FOR A COUPLE OF MINUTES TO RESET IT)
AUTO GOAL (LEARNS YOUR ACTIVITY LEVEL AND ASSIGNS A DAILY STEP GOAL)
CALORIES BURNED
FLOORS CLIMBED
DISTANCE TRAVELLED
INTENSITY MINUTES
TRUEUP™
MOVE IQ™
GARMIN CONNECT™ CHALLENGES APP: Yes (optional Connect IQ app)

Fitness equipment/gym
AUTOMATIC REP COUNTING
AVAILABLE GYM ACTIVITY PROFILESStrength, HIIT, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates, Yoga
STRENGTH WORKOUTS
HIIT WORKOUTS
YOGA WORKOUTS
PILATES WORKOUTS
ON-SCREEN WORKOUT ANIMATIONS
ON-SCREEN WORKOUT MUSCLE MAPS

Training, planning and analysis features
HR ZONES
HR ALERTS
HR CALORIES
% HR MAX
% HRR
RECOVERY TIME
AUTO MAX HR
MORNING REPORT
RACE GLANCE/WIDGET
HRV STATUS
HR BROADCAST (BROADCASTS HR DATA OVER ANT+™ TO PAIRED DEVICES)
RESPIRATION RATE (DURING EXERCISE): Yes (with compatible accessory)
GPS SPEED AND DISTANCE
CUSTOMISABLE SCREEN(S)
CUSTOMISABLE ACTIVITY PROFILES
AUTO PAUSE®
INTERVAL TRAINING
IMPROVED INTERVAL (INCLUDES OPEN REPEATS, INTERVALS DATA PAGE, REST SCREEN AND AUTO DETECTION)
ADVANCED WORKOUTS
DOWNLOADABLE TRAINING PLANS
AUTO LAP®
MANUAL LAP
REST TIMER
CONFIGURABLE LAP ALERTS
VO2 MAX (RUN)
VO2 MAX (TRAIL RUN)
TRAINING STATUS (LETS YOU SEE IF YOU’RE TRAINING EFFECTIVELY BY TRACKING YOUR TRAINING HISTORY AND FITNESS LEVEL TREND)Improved
TRAINING LOAD (YOUR TOTAL TRAINING LOAD FOR THE LAST 7 DAYS CALCULATED FROM ESTIMATED EPOC)
TRAINING LOAD FOCUS
TRAINING EFFECT (AEROBIC)
TRAINING EFFECT (ANAEROBIC)
PRIMARY BENEFIT (TRAINING EFFECT LABELS)
IMPROVED RECOVERY TIME
DAILY SUGGESTED WORKOUTS: Yes (7 days)
CUSTOMISABLE ALERTS
AUDIO PROMPTS
FINISH TIME
VIRTUAL PARTNER
RACE AN ACTIVITY
AUTO MULTISPORT ACTIVITIES
MULTI-SPORT
COURSE GUIDANCE
TOUCH AND/OR BUTTON LOCK
AUTO SCROLL
ACTIVITY HISTORY ON WATCH
PHYSIO TRUEUP

Running features
AVAILABLE RUN PROFILESRunning, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running, Ultra Running
GPS-BASED DISTANCE, TIME AND PACE
RUNNING DYNAMICSYes (with compatible accessory)
VERTICAL OSCILLATION AND RATIO: Yes (with compatible accessory)
GROUND CONTACT TIME AND BALANCE: Yes (with compatible accessory)
STRIDE LENGTH (REAL TIME): Yes (with compatible accessory)
CADENCE (PROVIDES REAL-TIME NUMBER OF STEPS PER MINUTE)
RUNNING POWER: Yes (with compatible accessory)
PERFORMANCE CONDITION
LACTATE THRESHOLD: Yes (with compatible accessory)
PACEPRO™ PACING STRATEGIES
RUN WORKOUTS
TRAIL RUN AUTO CLIMB
RACE PREDICTOR
COURSE- AND WEATHER-SPECIFIC RACE PREDICTOR
FOOT POD CAPABLE

Outdoor recreation
AVAILABLE OUTDOOR RECREATION PROFILES: Hiking, Skiing, Snowboarding, XC Classic Skiing, Stand Up Paddleboarding, Rowing
POINT-TO-POINT NAVIGATION
BREADCRUMB TRAIL IN REAL TIME
BACK TO START
TRACBACK®
ULTRATRAC MODE
UP AHEAD
ELEVATION PROFILE
DISTANCE TO DESTINATION
BAROMETRIC TREND INDICATOR WITH STORM ALERT
VERTICAL SPEED
TOTAL ASCENT/DESCENT
FUTURE ELEVATION PLOT
PROJECTED WAYPOINT
SUN AND MOON INFORMATION

Cycling features
AVAILABLE CYCLING PROFILES: Biking, Indoor Biking, Mountain Biking, eBiking, eMountain Biking
ALERTS (TRIGGERS ALARM WHEN YOU REACH GOALS INCLUDING TIME, DISTANCE, HEART RATE OR CALORIES)
COURSES
BIKE LAP AND LAP MAXIMUM POWER (WITH POWER SENSOR)
RACE AN ACTIVITY
FTP (FUNCTIONAL THRESHOLD POWER): Yes (with compatible accessory)
COMPATIBLE WITH VECTOR™ AND RALLY™ (POWER METERS)
POWER METER COMPATIBLE
COMPATIBLE WITH VARIA VISION™ (HEAD-MOUNTED DISPLAY)
COMPATIBLE WITH VARIA™ RADAR (REAR-FACING RADAR)
COMPATIBLE WITH VARIA™ LIGHTS
SPEED AND CADENCE SENSOR SUPPORT (W/SENSOR)

Swimming features
AVAILABLE SWIM PROFILESPool swimming, open water swimming
OPEN-WATER SWIM METRICS (DISTANCE, PACE, STROKE COUNT/RATE, STROKE DISTANCE, SWIM EFFICIENCY (SWOLF), CALORIES)
POOL SWIM METRICS (LENGTHS, DISTANCE, PACE, STROKE COUNT, SWIM EFFICIENCY (SWOLF), CALORIES)
STROKE TYPE DETECTION (FREESTYLE, BACKSTROKE, BREASTSTROKE, BUTTERFLY) (POOL SWIM ONLY)
DRILL LOGGING (POOL SWIM ONLY)
BASIC REST TIMER (UP FROM 0) (POOL SWIM ONLY)
"REPEAT ON" REST TIMER (POOL SWIM ONLY)
AUTO REST (POOL SWIM ONLY)
TIME AND DISTANCE ALERTS
PACING ALERTS (POOL SWIM ONLY)
COUNTDOWN START
POOL SWIM WORKOUTS
CRITICAL SWIM SPEED
UNDERWATER WRIST-BASED HEART RATE
HEART RATE FROM EXTERNAL HRM (REAL-TIME DURING RESTS, INTERVAL AND SESSION STATS DURING RESTS, AND AUTOMATIC HEART RATE DOWNLOAD POST-SWIM)yes (with HRM-Swim, HRM-Pro or HRM-Pro Plus)

Kid activity tracking features
TOE-TO-TOE™ CHALLENGES APP: Yes (optional Connect IQ Toe-to-Toe™ Challenges app)

Connectivity
SMART TRAINER CONTROL