Garmin Forerunner 255 & 255s

Run at a higher level with the Forerunner® 255 series. This running smartwatch helps you train and recover smarter with training status, running power, multi-band GPS and daily suggested workouts that adapt to your performance and goals. Plus, other new features such as race widget, which helps you plan your race-day strategy, and morning report with HRV status that reveals your overall health alongside the day ahead. And with Garmin Pay™ contactless payments¹, it’s never been easier to buy that postworkout coffee — no matter how you work out — with over 30 activity profiles including triathlons, cycling, swimming and more. With Forerunner 255, you can get a continuous picture of your health, from training and recovery to sleep quality and overall wellness with up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode.

New Features in the Forerunner 255 (compared to the Forerunner 245)

New Features as of March, 2024

NEW! MULTISPORT AUTO TRANSITION

Focus on the race and let your watch take care of recording splits between swim, bike and run during multisport activities.

NEW! RUNNING TRACK DATABASE

With more than 10,000 tracks (400 meters) from all over the world, use the track run activity profile to get an accurate measurement of performance – even on a track you’ve never run before.

NEW! LAP UNDO

No need to worry about accidental lap button presses any longer. With the lap undo function, you can now undo a manually recorded lap within 8 seconds of a new lap creation.

NEW! SLEEP COACH

Receive a sleep score along with personalized coaching for how much sleep is recommended and keep track of different sleep stages, naps and other key metrics (measured during sleep) such as Pulse Ox and heart rate variability (HRV) status.

NEW! JUMP ROPE ACTIVITY

Choose from free mode or goal mode (target time or target reps) to track duration, total reps, total rounds, round info, max streak, heart rate, calories burned and jump beats per minute. It also offers a customizable alert interval and countdown timer.

New Features as of September 5, 2023

NEW! NEW ACTIVITY PROFILES

Get better at whatever with new preloaded activity profiles for team sports ranging from football, baseball and basketball to soccer, rugby, hockey, lacrosse and more — plus racket sports, boxing and others.

NEW! MUSCLE MAPS FOR PILATES, HIIT, CARDIO

See what muscles you’re working for HIIT, cardio, Pilates and strength workouts. Preview the muscle groups that your custom or preset workouts will impact, then review your stats post-workout in the Garmin Connect™ app.

NEW! WORKOUTS APP

Easily find and organize workouts across all your athletic pursuits — including daily suggested workouts plus those downloaded or created in the Garmin Connect app. Follow up with a review of workout history directly from your device.

NEW FEATURES AS OF FEBRUARY, 2023:

NEW! UNIFIED TRAINING STATUS

TrueUp™ physio data synchronization will now unify training features including training status, training load, load focus and HRV status for users with multiple compatible devices. You can designate a primary device in order to have more consistent training data so you can train smarter. This includes users with multiple compatible smartwatches or those with a compatible smartwatch and Edge® 1040 device.

GRADE ADJUSTED PACE

Whether running uphill or downhill, runners can now see their equivalent flat ground pace, making it easy to maintain an even effort over various terrain.

WRIST-BASED RUNNING POWER (WITHOUT ACCESSORY)

To manage efforts, receive real-time metrics of how much power is being exerted on a run —now with no additional accessory required.

MORNING REPORT

Morning report summarizes your sleep, HRV status, daily workout suggestion, weather and calendar in one place as soon as you wake up².

BATTERY LIFE

Get up to 14 days in smartwatch mode and up to 30 hours in GPS mode with Forerunner 255, or up to 12 days in smartwatch mode and up to 26 hours in GPS mode with Forerunner 255S.

HRV STATUS

HRV status tracks your heart rate variability while you sleep, giving you greater insight into your overall wellness, recovery and training².

SPORTS APPS

In addition to the 30+ built-in activity profiles, new to the Forerunner 255 series is the triathlon activity profile. For multisport races and brick workouts, transition to the next activity with a single button press.

RACE WIDGET

Race widget provides a countdown and race day weather forecast while predicting the completion time of your next race based on course details, fitness data, weather and more.

SUGGESTED WORKOUTS

View your entire week of daily suggested workouts, which adapt after every run to match your performance and recovery.

UPDATED DESIGN

Available in both 41mm and 46mm-sized cases, and with a noticeably slim profile, Forerunner 255 has the perfect fit for every wrist so you can wear it (and keep an eye on your wellness) both day and night.

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

RUNNING POWER

Get a continuous measurement on your wrist of how much power you’re applying to the road as you run³.

GARMIN PAY™

Leave your cash and cards at home; Garmin Pay contactless payments¹ let you pay for purchases on the go.

MULTI-BAND GPS

Multi-band satellite tracking on GPS, GLONASS and Galileo networks gives you superior accuracy for how far and how fast you’ve run — even in challenging environments.

IMPROVED TRAINING STATUS

Evaluates your current training status to indicate if you’re undertraining or overdoing it; offers additional performance monitoring features

IMPROVED ACUTE LOAD

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

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.

PLUS, the same great features as a the previous models:

RUNNING DYNAMICS

Provides advanced running dynamics³, including ground contact time balance, stride length, vertical ratio and more.

GARMIN COACH

Get free adaptive training plans from Garmin Coach, or create your own custom workouts at our Garmin Connect™ online fitness community.

CONNECTED FEATURES

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

If you feel unsafe or if your watch senses that an incident occurred, assistance and incident detection features send your location to emergency contacts. Incident detection is enabled by default for select activity profiles only⁴.

BODY BATTERY™

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

BUILT-IN SPORTS APPS

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

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 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.

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.

¹View current supported country, payment network and issuing bank information at Garmin.com/en-US/garminpay/banks/
² The data and information provided by these devices is intended to be a close estimation of your activity and metrics tracked but may not be precisely accurate.
³ When used with Running Dynamics Pod or HRM-Pro™ monitor (sold separately)
⁴ When paired with a compatible smartphone; see Garmin.com/ble. For safety and tracking feature requirements and limitations, see Garmin.com/safety.