TUNE YOUR TRAINING

Add a beat to your step. Get the training and recovery insights you need to run at a higher level — plus music to motivate you along the way.

Charge less, train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode.

Plan your strategy with daily suggested workouts, course details and more on the race widget.

Get an overview of your sleep, HRV status and daily workout with morning report.

Push your limits with a built-in triathlon feature and 30+ activity profiles.

Utilize a full suite of advanced metrics and training tools to reach your goals.

Pay for your post-workout coffee with Garmin Pay contactless payments1 — and listen to music on the go.

In the Box:

  • Forerunner 255s  Music
  • Charging/data cable
  • Documentation

READY FOR THE LONG RUN

Get an uninterrupted picture of your daily health and nightly sleep with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode.

(ALMOST) AS LIGHT AS A FEATHER

With its sleek design and 1.4 oz weight, you’ll almost forget you’re wearing Forerunner 255S Music — 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.

Light on the
wrist, not on
features.

MORNING REPORT

Receive an overview of your sleep, recovery and training outlook as soon as you wake up — alongside HRV status, training readiness and weather. You can even customize your report to show 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

Switch up your workouts with activity profiles for cycling, triathlon, pool and open-water swimming, track running and more. For races and brick workouts, switch sports with a single button press.

RACE WIDGET

Get ready for your next race with training tips, 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 programs, featuring guidance from expert coaches that adapt to you and your goals.

RUNNING POWER

Get a continuous measurement on your wrist of how much power you’re applying to the road as you run when using a Running Dynamics Pod or HRM-Pro monitor.

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

The PacePro feature helps keep you on pace with grade-adjusted guidance as you run a course.

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

Compare the intensity of your recent workouts to the optimal range to improve your fitness and training history.

RUNNING DYNAMICS

When using a Running Dynamics Pod or HRM-Pro monitor, the Forerunner 255 Music 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.

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, heart rate and heart rate variability for a real-time assessment of your current ability to perform.

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.

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.

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.

A depth of
wellness insights.

WRIST-BASED HEART RATE

The watch constantly samples your heart rate4 with our latest-generation heart rate sensor and will alert you if it stays too high or too low while you’re at rest. It also helps gauge how hard you work during activities — even while swimming.

BODY BATTERY™ ENERGY MONITORING

Track your body’s energy levels so you can find the best times for activity and rest4.

IMPROVED SLEEP MONITORING AND SLEEP SCORE

Understand how your body is recovering — and get ready for training — with our improved sleep monitoring feature. After waking up, you’ll receive a sleep score, as well as breakdown of your sleep stages, Pulse Ox5 and respiration, alongside detailed insights for improved sleep quality.

PULSE OX SENSOR

This wrist-based Pulse Ox sensor5 monitors blood oxygen saturation levels to support advanced sleep monitoring and altitude acclimation.

WOMEN'S HEALTH TRACKING

Use the Garmin Connect app to track your menstrual cycle or pregnancy. Log symptoms, get exercise and nutrition education, and more. Even see and log details on your wrist with the Women’s Health Tracking app.

HEALTH SNAPSHOT™ FEATURE

Log a 2-minute session to record key stats, including heart rate4, heart rate variability, Pulse Ox5, respiration and stress. Then generate a report with those stats to share via the Garmin Connect app on your compatible smartphone.

INTENSITY MINUTES

Our intensity minutes feature tells you when during the day you earned them and during what activity.

STRESS TRACKING

Find out if you’re having a calm, balanced or stressful day. Relax reminders will even prompt you to do a short breathing activity when the watch detects that you’re feeling stressed.

Stay connected at
every step.

MULTI-BAND GNSS SUPPORT

Access multiple global navigation satellite systems, and get access to multiple frequencies sent by navigation satellites for improved accuracy in areas where GNSS signals are reflected, weak or typically don’t penetrate — giving you superior accuracy for how far and how fast you’ve run — even in challenging environments.

MUSIC ON YOUR WRIST

Download up to 2,000 songs plus playlists from your Spotify, Deezer or Amazon music accounts (subscription may be required).

GARMIN PAY CONTACTLESS PAYMENTS

Breeze through checkout lines with Garmin Pay contactless payments6 through participating providers.

SMART NOTIFICATIONS

Receive emails, texts and alerts right on your watch when paired with your Apple® or Android™ smartphone. You can even respond to texts if you have an Android phone.

SAFETY AND TRACKING FEATURES

If you feel unsafe or if your watch senses that an incident occurred, the Assistance and incident detection features4 send your location to emergency contacts. Incident detection is enabled by default for select activity profiles only.

LIVETRACK FEATURE

Use LiveTrack to let friends and family follow your real-time location4 and even view your entire preplanned course. Rest assured that your loved ones know exactly where you’re running.

GARMIN CONNECT APP

See your health and fitness information, connect and compete with friends, sign up for challenges to earn badges and more — all in one free, zero-subscription app.

CONNECT IQ™ STORE

Download custom watch faces, add data fields, and get apps or widgets from the Connect IQ Store app downloaded on your compatible smartphone..

See your stats, and track your goals in the Garmin Connect™ app

Learn More

Run with the best. Follow us on the @GarminRunning Instagram® channel.

Customize your Garmin device using the Connect IQ Store

QuickFit® accessory bands let you match your style with no tools required.


This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Pulse Ox not available in all countries.
When paired with your compatible smartphone. For safety and tracking feature requirements and limitations, see Garmin.com/safety.
FirstBeat Analytics
SPOTIFY and the Spotify logo are among the registered trademarks of Spotify AB. Amazon Music and all related logos are trademarks of Amazon.com, Inc. or its affiliates. Apple is a trademark of Apple Inc., registered in the U.S. and other countries. Android is a trademark of Google LLC.

  • GENERAL

    LENS MATERIAL
    Corning® Gorilla® Glass 3

    BEZEL MATERIAL
    fiber-reinforced polymer

    QUICK RELEASE BANDS yes (18 mm, Industry standard)
    STRAP MATERIAL
    silicone

    PHYSICAL SIZE
    41 x 41 x 12.4 (mm)

    Fits wrists with a circumference of 110-175 mm

    COLOR DISPLAY
    DISPLAY SIZE 1.1" (27.5mm) Diameter
    DISPLAY RESOLUTION 218 x 218 pixels
    DISPLAY TYPE sunlight-visible, transflective memory-in-pixel (MIP)
    WEIGHT
    39 g

    BATTERY LIFE
    Smartwatch mode: Up to 12 days
    GPS-only GNSS mode: Up to 26 hours
    All-Systems GNSS mode with music: Up to 5.5 hours
    All-Systems GNSS mode: Up to 20 hours
    All-Systems GNSS mode plus Multi-Band: Up to 13 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
    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

    Connectivity Bluetooth®, ANT+®, Wi-Fi®
    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 (customizable low power watch)
    Controls smartphone music
    Plays and controls watch music
    Music storage Up to 2000 songs
    Find My Phone
    Find My Watch
    VIRB® Remote
    Smartphone compatibility iPhone®, Android™
    Pairs with Garmin Golf app
    Pairs with Garmin Connect™ Mobile
    Garmin Pay™

  • SAFETY AND TRACKING FEATURES

    LiveTrack
    Spectator messaging yes (with compatible smartphone)
    Group 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 TRAVELED
    INTENSITY MINUTES
    TRUEUP™
    MOVE IQ™
    GARMIN CONNECT™ CHALLENGES APP yes (optional Connect IQ app)

  • GYM & FITNESS EQUIPMENT

    AVAILABLE GYM ACTIVITY PROFILES Strength, HIIT, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates, Yoga
    CARDIO WORKOUTS
    STRENGTH WORKOUTS
    HIIT WORKOUTS
    YOGA WORKOUTS
    PILATES WORKOUTS
    ON-SCREEN WORKOUT ANIMATIONS
    ON-SCREEN WORKOUT MUSCLE MAPS
    AUTOMATIC REP COUNTING

  • 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
    CUSTOMIZABLE DATA PAGES
    CUSTOMIZABLE 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 improved
    TRAINING LOAD
    TRAINING LOAD FOCUS
    TRAINING EFFECT
    TRAINING EFFECT (ANAEROBIC)
    PRIMARY BENEFIT (TRAINING EFFECT LABELS)
    IMPROVED RECOVERY TIME
    DAILY SUGGESTED WORKOUTS yes (7 days)
    CUSTOM ALERTS
    AUDIO PROMPTS
    FINISH TIME
    VIRTUAL PARTNER
    RACE AN ACTIVITY
    AUTO MULTISPORT ACTIVITIES
    MANUAL MULTISPORT ACTIVITIES
    COURSE GUIDANCE
    TOUCH AND/OR BUTTON LOCK
    AUTO SCROLL
    ACTIVITY HISTORY ON WATCH
    PHYSIO TRUEUP

  • RUNNING FEATURES

    AVAILABLE RUN PROFILES
    Running, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running, Ultra Running

    GPS-BASED DISTANCE, TIME AND PACE
    RUNNING DYNAMICS yes (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
    RACE PREDICTOR
    COURSE- AND WEATHER-SPECIFIC RACE PREDICTOR
    FOOT POD CAPABLE

  • OUTDOOR RECREATION FEATURES

    AVAILABLE OUTDOOR RECREATION PROFILES
    Hiking, Skiing, Snowboarding, XC Classic Skiing, Stand Up Paddleboarding, Rowing

    POINT-TO-POINT NAVIGATION
    BREAD CRUMB TRAIL IN REAL TIME
    BACK TO START
    TRACBACK®
    ULTRATRAC MODE
    UP AHEAD
    ELEVATION PROFILE
    DISTANCE TO DESTINATION
    BAROMETRIC TREND INDICATOR WITH STORM ALERT
    TRAIL RUN AUTO CLIMB
    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 PROFILES
    Pool 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 ONLY)
    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™ or HRM-Pro™)

  • Kid Activity Tracking Features

    Toe-to-Toe™ Challenges app yes (optional Connect IQ app)

  • CONNECTIVITY

    iPhone®, Android™

  • COUNTRY OF ORIGIN

    Made in Taiwan. Cable made in Taiwan or China.

  • GIFT BOX DIMENSIONS

    2.7” x 5.6” x 2.4” (6.9 cm x 14.1 cm x 6.2 cm)

  • GIFT BOX WEIGHT

    5.0 oz (142 g)

  • UPC

    753759279936

Garmin Connect™ App Mobile

010-D1303-01

Garmin Explore™ App

010-EXPLR-00

Connect IQ™ Store

010-CONIQ-00

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