RUN AT A HIGHER LEVEL

You're progressing. It's time for the next step. Gain insights into training and recovery needed to achieve your best time yet.

• Get insights into your sleep, heart rate variability status, and daily exercise through morning reports.
• Charge less and train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode.
• Push your limits with built-in triathlon and over 30 activity profiles.
• Plan your strategy with recommended workouts for the day, course details, and other race widget options.
• Utilize a full range of advanced metrics and training tools to reach your goals.
• Enjoy post-workout coffee with Garmin Pay¹ contactless payment solution.

READY FOR LONG RUNS

12 days of battery life in smartwatch mode and up to 26 hours in GPS mode ensure continuous tracking of daily health and night sleep.

AS LIGHT AS A FEATHER (ALMOST)

Thanks to its sleek design and 39g weight, you'll almost forget you're wearing the Forerunner® 255S, even while sleeping.

SWEAT-READY MATERIALS

Equipped with practical buttons and a silicone strap, this watch is ready to wear and endure with durable Corning® Gorilla® Glass 3.

Light on the wrist. Loaded with features.

MORNING REPORT

Receive a sleep overview immediately upon waking up, including heart rate variability status and weather conditions. You can even customize the report to display what you want.

HEART RATE VARIABILITY STATUS

Gain deeper insights into your overall health, training, and recovery with sleep heart rate variability, based on technology developed by our Firstbeat Analytics™ team.

BUILT-IN SPORTS APPS

Make use of over 30 built-in activities, including triathlon and open water swimming profiles - new to the Forerunner 255 series. Transition to the next activity in races and multisport workouts with just a press of a button.

RACE WIDGET

Prepare for your next race with training tips, personalized recommended daily workouts, and finish time predictions based on course details, weather conditions, and performance.

DAILY WORKOUT SUGGESTIONS

In the Garmin Connect™ app calendar, view recommended workouts for the entire week that adjust based on your performance and recovery after each run.

GARMIN COACH

Free customizable training plans encompass 5k, 10k, and half marathon distances, including expert coach tips tailored to you and your goals.

TRIATHLON AND MULTISPORT ACTIVITY PROFILES

Utilize built-in profiles for triathlon, duathlon, multisport, and swim/run and easily switch between sports with a single button press. Or create your own multisport activity profile.

Running Power

When using a running dynamics pod or the HRM-Pro™ sensor, you get continuous running power measurements transmitted to the ground, allowing you to regulate effort.

RECOVERY TIME

Learn how long you need to recover after your last workout, taking into account total training load, sleep, and daily activities outside of exercise.

PacePro™ Feature

To help you plan your race day strategy, this feature offers GPS pace guidance for your chosen course or distance, so you can adjust your effort based on what's ahead.

TRAINING STATUS

By applying new indicators like heart rate variability status, recent training history, and performance, gain easy insight into your overall effort, whether you're training productively, peaking, or overreaching.

TRAINING LOAD

Review training history and compare recent exercise intensity with optimal range to improve your fitness.

TRAINING EFFECT

Learn how exercise affects your endurance, speed, and strength with aerobic and anaerobic training effect data.

PERFORMANCE CONDITION

During your run, analyze your pace and heart rate to assess your current fitness and real-time performance effect.

RUNNING DYNAMICS

When using a running dynamics pod or the HRM-Pro sensor, the Forerunner 255S measures key running metrics like cadence, stride length, ground contact time, and balance, comparing it with others on the Garmin Connect app.

COURSES

Create or find courses in our Garmin Connect app, ensuring you never run out of ideas. You can plan them on other platforms like Strava and Komoot and then automatically sync them with your Forerunner device.

TRACK RUNNING

Ready for speed training? Enter the track running activity to input your track number, accurately measuring your lap distance in meters.

RACE TIME PREDICTOR

Based on your running history and overall fitness, get pace estimates for distances like 5k, 10k, or even a marathon. Plus, trend data highlights the impact of your training over time.

CROSS-TRAINING

Mix up your training with different exercise types. Free HIIT workouts, strength, cardio, yoga, and Pilates are included with the watch, and you can download more from the Garmin Connect app.

Deep Insights into Your Health Level.

WRIST-BASED HEART RATE SENSOR

The watch continuously measures your heart rate² with our latest-generation heart rate sensor and alerts you if it stays too high or too low while at rest. It also measures your effort during activities, even while swimming.

BODY BATTERY™ ENERGY MONITOR

Measure the energy levels in your body to find the best time for activity and rest².

SLEEP SCORE AND ADVANCED SLEEP TRACKING

Determine sleep quality and get insights for improvement. You can even track different sleep stages, as well as pulse, stress, pulse oximetry³, and respiration.

PULSE OXIMETRY SENSOR

The wrist-based pulse oximetry sensor³ monitors blood oxygen saturation levels, allowing for advanced sleep tracking and altitude acclimatization.

Menstrual Tracking

Track your menstrual cycle or pregnancy in the Garmin Connect app. Record symptoms, receive exercise and nutrition advice, and more. You can even see and record details right on your wrist with the women's health tracking app.

INTENSITY MINUTES

The intensity minutes feature shows when you've earned them during the day and during which activities.

STRESS TRACKING

Find out if you're having a calm, balanced, or stressful day. Relaxation reminders will even prompt you to perform a brief breathing activity when the watch detects you're stressed.

HEALTH SNAPSHOT™ Feature

Record a two-minute session to capture key stats, including heart rate², heart rate variability, pulse oximetry³, respiration, and stress. Then generate a report with this data using the Garmin Connect app on a compatible smartphone for sharing.

Stay Connected Every Step of the Way.

GNSS SUPPORT WITH MULTI-FREQUENCY BANDS

Access multiple global navigation satellite systems and multiple frequencies for greater accuracy in challenging environments where GNSS signals may be obstructed, weak, or not normally accessible. Achieve premium distance and speed accuracy, even in demanding conditions.

GARMIN PAY CONTACTLESS PAYMENT FEATURE

Skip checkout lines at stores with Garmin Pay¹ contactless payment solution at supported service providers.

SMART NOTIFICATIONS

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

SAFETY AND TRACKING FEATURES

If you don't feel safe or if the watch detects an incident, safety and incident detection features⁴ send your location to emergency contacts. Incident detection is enabled by default for select activity profiles.

LIVE TRACKING

LiveTrack allows your friends and family to follow your real-time location⁴ and even review your entire preplanned route. Rest assured that your loved ones will know exactly where you're running.

Garmin Connect

Review health and fitness information, connect and compete with friends, join challenges to earn medals, and more, all on a free, subscription-free app.

CONNECT IQ™ STORE

Download custom watch faces, add data fields, and download apps and widgets from the Connect IQ App Store to your compatible smartphone.

^{1 View information on currently supported countries, payment networks, and card issuers.            
2 Activity tracking accuracy              
3 This device is not a medical device and is not intended for use in the diagnosis or monitoring of medical conditions; see Garmin.com/ataccuracy. Pulse Ox not available in all countries.               
4 When paired with a compatible smartphone. For requirements and limitations of safety and tracking features, refer to Garmin.com/safety}

Specifications:

Health Tracking

Sensors

Smart Features

Safety and Tracking Features

In the Box:

• Forerunner® 255S, Light Pink
• Charging/Data Cable
• Documentation