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Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch
Garmin Forerunner 255 Running Smartwatch

Garmin Forerunner 255 Running Smartwatch

by Garmin
Sold out
$349.99 - $399.99
$349.99
$349.99 - $399.99
$349.99

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Forerunner 255 and 255S

Garmin Forerunner 255 Running Smartwatch

The Garmin Forerunner 255 Running Smartwatch is a running smartwatch in 41 mm and 46 mm sizes, built for running at a higher level. Your race prep sits on one screen with the race widget: tips, suggested workouts and a predicted finish time. PacePro turns a course into GPS pace targets for race day. Before a brick workout, you can switch from bike to run with one button press. Each size comes in a standard and a Music version (subscription may be required), across eight color options.

You're making strides; now, let's take the next step. Get the training and recovery insights you'll need to notch your best time yet.

Get an overview of your sleep, HRV status and daily workout with morning report. Charge less, train more with up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode (46 mm). Push your limits with a built-in triathlon feature and 30+ activity profiles. Plan your strategy with daily suggested workouts, course details and more on the race widget. Use a full suite of training metrics and tools to reach your goals. Pay for your post-workout coffee with Garmin Pay contactless payments.

SPORTS
30+
activity profiles
DISPLAY
MIP
sunlight-visible
MEMORY
4 GB
every model
WATER RATING
5 ATM
every model
Triathlon profiles Multi-band GNSS Garmin Pay Music in both sizes
Garmin Forerunner 255S Music in Whitestone, stats on screen

Run at a higher level

How it works

HRV status
On the 255, HRV status, which tracks the variation in time between heartbeats while you sleep, builds on technology from Garmin's Firstbeat Analytics team. The trend appears in the morning report, a summary of your sleep, recovery and planned training when you wake.
Recovery time
After a hard session, recovery time counts down to the next one, adding in stress, sleep and the rest of your day.
Training status
The watch shows training status, which reads HRV status and recent training to label it productive, peaking or strained, which shows when a block needs adjusting.
Acute load
Acute load sets the intensity of your recent workouts against a target range, which helps you raise training without spiking it.

Plan your race

Key features

Garmin Coach
Free 5K, 10K and half plans
Daily suggested workouts
Adapt after every run
Race widget
Tips, workouts and finish times
PacePro
GPS pace guidance by course
Running power
With a Running Dynamics Pod or HRM-Pro
Performance condition
Real-time read on your ability
Visual race predictor
5K, 10K or marathon pace
Cross-training
HIIT, strength, yoga, Pilates

Music, money and heart rate

How to use it

Garmin Forerunner 255S Music, Spotify playlist on the watch
Music versions

Songs on the wrist

The 255 Music and 255S Music hold up to 500 songs for a full soundtrack on long runs without the phone.

  • All-Systems GPS with music: up to 6.5 hours (46 mm), 5.5 hours (41 mm)
  • Wi-Fi on Music versions
Garmin Forerunner 255S Music, heart rate sensor on the back
Heart rate

Track heart rate day and night

The Garmin Elevate wrist heart rate monitor samples all day and alerts you if your resting heart rate stays too high or too low. It keeps working in the pool, and swim sessions count toward your effort.

The wrist-based Pulse Ox sensor monitors blood oxygen saturation levels. Body Battery, an estimate of your energy reserves through the day, sits beside your sleep score and sleep stages.

  • Sleep score and sleep stages
  • Stress tracking

Inside the 255

Videos

Beside the 245 and 265

How it compares

Garmin Forerunner 245, lightweight running watch
Garmin Forerunner 245 Running Watch
Lightweight running watch with a sunlight-visible display.
Up to 7 days smartwatch Up to 24 hours GPS 38.5 g
Shop the Forerunner 245
You're Here
Garmin Forerunner 255, running smartwatch in two sizes
Garmin Forerunner 255 Running Smartwatch
Running smartwatch in 41 mm and 46 mm sizes, with Music versions.
Up to 14 days smartwatch (46 mm) Multi-band GPS Garmin Pay
Currently viewing
Garmin Forerunner 265, 46 mm AMOLED running watch
Garmin Forerunner 265 46mm Running Watch
46 mm AMOLED running watch with training readiness.
1.3" AMOLED touchscreen Up to 13 days smartwatch Multi-band GPS with SatIQ
Shop the Forerunner 265
Garmin Forerunner 265S, smaller AMOLED running watch
Garmin Forerunner 265S 42mm Running Watch
Smaller AMOLED running watch for wrists from 115 mm.
1.1" AMOLED touchscreen Up to 15 days smartwatch Up to 24 hours GPS
Shop the Forerunner 265S

Forerunner 255

Frequently asked questions

The 41 mm Forerunner 255S measures 41 x 41 x 12.4 mm, weighs 39 g and has a 1.1-inch display for wrists of 110-175 mm. The 46 mm Forerunner 255 measures 45.6 x 45.6 x 12.9 mm, weighs 49 g and has a 1.3-inch display for wrists of 130-205 mm. The larger case also runs longer on a charge.
The Music versions of both sizes, the 255S Music (41 mm) and the 255 Music (46 mm). They add music storage for phone-free listening (subscription may be required), plus Wi-Fi.
The 46 mm runs up to 14 days in smartwatch mode, 30 hours with GPS only, 25 hours on All-Systems and 16 hours with multi-band. The 41 mm runs up to 12 days, 26 hours, 20 hours and 13 hours on the same modes.
Yes. With its sleek design and 1.7 oz (46 mm) or 1.4 oz (41 mm) weight, you'll almost forget you're wearing it, even when you're asleep.
Multi-band GPS, which receives more than one frequency from each satellite, is on every 255 model. It accesses multiple global navigation satellite systems, and multiple frequencies sent by navigation satellites, for improved accuracy in areas where GNSS signals are reflected, weak or don't penetrate. It gives you superior accuracy for how far and how fast you've run, even in challenging environments.
Running dynamics and running power use a Running Dynamics Pod or HRM-Pro monitor. With one paired, every Forerunner 255 model measures cadence, stride length, ground contact time and balance, and more, while comparing to others in the Garmin Connect app.
If you feel unsafe or if your watch senses that an incident occurred, the assistance and incident detection features send your location to emergency contacts when paired with your compatible smartphone. Incident detection is enabled by default for select activity profiles only.
No. 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.
Your Forerunner 255 model in the size you chose, a charge/data cable and documentation.
Garmin backs it with a one-year limited warranty from the date of purchase against defects in materials or workmanship, and Garmin repairs or replaces defective components.
  • Lens material: Corning Gorilla Glass 3
  • Bezel material: Fiber-reinforced polymer
  • Strap material: Silicone
  • Physical size (46 mm: 255, 255 Music): 45.6 x 45.6 x 12.9 mm; fits wrists with a circumference of 130-205 mm
  • Physical size (41 mm: 255S, 255S Music): 41 x 41 x 12.4 mm; fits wrists with a circumference of 110-175 mm
  • Display size (46 mm): 1.3 in. (33 mm) diameter, 260 x 260 pixels
  • Display size (41 mm): 1.1 in. (27.5 mm) diameter, 218 x 218 pixels
  • Display type: Sunlight-visible, transflective memory-in-pixel (MIP)
  • Weight: 46 mm: 49 g; 41 mm: 39 g
  • Quick release bands: 46 mm: 22 mm; 41 mm: 18 mm (industry standard)
  • Battery life (46 mm: 255): Smartwatch mode: up to 14 days; GPS-only GNSS mode: up to 30 hours; All-Systems GNSS mode: up to 25 hours; All-Systems plus Multi-Band: up to 16 hours
  • Battery life (41 mm: 255S): Smartwatch mode: up to 12 days; GPS-only GNSS mode: up to 26 hours; All-Systems GNSS mode: up to 20 hours; All-Systems plus Multi-Band: up to 13 hours
  • Battery life (46 mm: 255 Music): Smartwatch mode: up to 14 days; GPS-only GNSS mode: up to 30 hours; All-Systems GNSS mode with music: up to 6.5 hours; All-Systems GNSS mode: up to 25 hours; All-Systems plus Multi-Band: up to 16 hours
  • Battery life (41 mm: 255S Music): 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 plus Multi-Band: up to 13 hours
  • Memory/History: 4 GB
  • Water rating: 5 ATM
  • Connectivity: 255 and 255S: Bluetooth, ANT+; Music versions: Bluetooth, ANT+, Wi-Fi
  • Sensors: GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ, Garmin Elevate wrist heart rate monitor, Pulse Ox, barometric altimeter, compass, gyroscope, thermometer
  • Colors: 46 mm: Tidal Blue, Slate Gray, Whitestone Music, Black Music; 41 mm: Powder Gray, Light Pink, Whitestone Music, Black Music
  • 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 (46 mm); up to 12 days and 26 hours (41 mm)
  • (Almost) as light as a feather: With its sleek design and 1.7 oz (46 mm) or 1.4 oz (41 mm) weight, you'll almost forget you're wearing it, 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 customize 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 Garmin's Firstbeat Analytics team
  • Built-in sports apps: Tap into 30+ built-in activities, including the triathlon and open-water swimming profiles. 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, personalized 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: When using a Running Dynamics Pod or HRM-Pro 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 indicators such as HRV status, your recent exercise history and performance, get an easy insight into your overall effort, and see if you're training productively, peaking or strained
  • Acute load: See your training history, and compare the intensity of your recent workouts to the right 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 monitor, every Forerunner 255 model tracks 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
  • 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 shows 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
  • Wrist-based heart rate: The watch constantly samples your heart rate with the Garmin Elevate wrist heart rate monitor 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 rest
  • Sleep monitoring and sleep score: Understand how your body is recovering, and get ready for training, with the sleep monitoring feature. After waking up, you will receive a sleep score, as well as breakdown of your sleep stages, Pulse Ox and respiration, alongside detailed insights for better sleep quality
  • Pulse Ox sensor: The wrist-based Pulse Ox sensor monitors blood oxygen saturation levels. This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition.
  • 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
  • Intensity minutes: The 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
  • Health Snapshot feature: Log a 2-minute session to record key stats, including heart rate, heart rate variability, Pulse Ox, respiration and stress. Then generate a report with those stats to share via the Garmin Connect app on your compatible smartphone
  • 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 don't penetrate, giving you superior accuracy for how far and how fast you've run, even in challenging environments
  • Music on your wrist (Music versions): Download up to 500 songs plus playlists from your Spotify, Deezer or Amazon Music accounts (subscription may be required)
  • Garmin Pay contactless payments: Breeze past the queue with Garmin Pay contactless payments 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 features send your location to emergency contacts (when paired with your compatible smartphone). Incident detection is enabled by default for select activity profiles only
  • LiveTrack feature: Use LiveTrack to let friends and family follow your real-time location and even view your entire preplanned course (when paired with your compatible smartphone). 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 and widgets from the Connect IQ Store app downloaded on your compatible smartphone
  • Forerunner 255, 255S, 255 Music or 255S Music
  • Charge/data cable
  • Documentation



Overall rating: 5.0 / 5 from 2 reviews.

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Summary topics

Review topics: ["watch"].

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Reviews

Great watch for the money….

"Great watch for the money…."

— Jose Z. (5/5)

Great!

"Very happy with service and love my watch!!"

— YUK-YIN P. (5/5)

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