Garmin Forerunner 255S smartwatch review

The Garmin Forerunner 255S is the perfect tool for runners to help track their performance, check their fitness, and monitor their runs. Get ready to hit the ground running!

Garmin Forerunner 255S smartwatch review

Garmin Forerunner 255S smartwatch review summary

Garmin Forerunner 255S smartwatch product highlights

You’ve made impressive progress, and now it’s time to elevate your performance even further. With the Garmin Forerunner 255S smartwatch, you’ll gain access to valuable training and recovery insights that will help you reach your peak and achieve your personal best time. Take your running to a higher level with the tools and knowledge to optimize your training and maximize your results.

Garmin Forerunner 255S smartwatch product highlights are:

  • Start your day right with the morning report, providing a comprehensive overview of your sleep quality, HRV status, and daily workout progress.
  • Enjoy longer training sessions and less charging time with Garmin Forerunner 255S smartwatch, thanks to the impressive battery life of up to 12 days in smartwatch mode and up to 26 hours in GPS mode.
  • Take on the challenge of a triathlon or explore over 30 activity profiles tailored to your preferred sports and fitness routines.
  • Stay one step ahead with the race widget, offering daily suggested workouts, course details, and more to help you plan and execute your racing strategy effectively.
  • Unleash your full potential with a comprehensive suite of advanced metrics and training tools, empowering you to surpass your goals and achieve new heights of performance.
  • READY FOR THE LONG RUN: Enjoy a seamless experience monitoring your daily health and sleep patterns with the impressive battery life of up to 12 days in smartwatch mode and up to 26 hours in GPS mode.
  • AS LIGHT AS A FEATHER: Experience ultimate comfort with the lightweight design and mere 49g weight of the Garmin Forerunner 255S smartwatch, making it barely noticeable even during your sleep.
  • SWEAT-READY MATERIALS: Designed for durability, this watch features user-friendly buttons and a resilient silicone band. The Corning Gorilla Glass 3 ensures exceptional resistance against wear and tear, making it suitable for your most intense workouts.

Garmin Forerunner 255S smartwatch features

Garmin Forerunner 255S smartwatch features are:

  1. Prepare for your upcoming race with Garmin Forerunner 255S smartwatch, including marathons, with the race widget, offering training tips, personalized daily workouts, and completion time predictions based on course details, weather conditions, and your performance.
  2. Stay on top of your training routine with the Garmin Forerunner 255S’s daily suggested workouts feature. Easily access and track your personalized workout plan for the entire week, with automatic adaptations based on your performance, recovery, and upcoming races listed in your Garmin Connect smartphone app calendar.
  3. Maintain your energy and performance throughout your run with the Garmin Forerunner 255S smartwatch’s grade-adjusted pace feature. This innovative function helps you optimize your pace based on the terrain, ensuring you don’t exhaust yourself too early and allowing you to perform according to your planned goals.
  4. Stay motivated with daily suggested workouts that adapt based on your performance, recovery, and upcoming races in your Garmin Connect app calendar. Get a quick overview of your training status, including productivity, peaking, or strain, by utilizing indicators such as HRV status, recent exercise history, and performance.
  5. With the Garmin Forerunner 255S smartwatch, you have access to a wide range of courses to keep your running routine exciting and diverse. Whether you create new courses within the Garmin Connect app or import them from platforms like Strava and Komoot, your options are limitless.
  6. Additionally, the visual race predictor feature takes into account your running history and fitness level, providing you with estimated paces for various distances, including 5Ks, 10Ks, and even marathons. Furthermore, the trend data feature showcases the impact of your training over time, giving you valuable insights into your progress and performance.
  7. Diversify your training routine with cross-training activities using the Garmin Forerunner 255S smartwatch. Enjoy the freedom to choose from a variety of workouts including HIIT, strength training, cardio, yoga, and Pilates, all conveniently preloaded on the watch. And if you’re looking for even more options, simply access the Garmin Connect app to download additional workouts and expand your fitness repertoire.

Garmin Forerunner 255S smartwatch more features

Garmin Forerunner 255S smartwatch more features:

  • Start your day with a personalized morning report that provides an overview of your sleep, training outlook, HRV status, weather, and more as soon as you wake up.
  • Assess your overall health, recovery, and training performance with HRV status, which provides a comprehensive understanding while you sleep.
  • Reach your running goals with the help of free adaptive training plans for 5K, 10K, and half marathon distances provided by Garmin Coach.
  • Plan your recovery time effectively by knowing how long you need to recover before your next high-effort workout, based on your latest training data.
  • Optimize your activity and rest schedule by tracking your body’s energy levels via Garmin Forerunner 255S smartwatch with Body Battery energy monitoring.
  • Sleep score and advanced sleep monitoring: Monitor the quality of your sleep and gain valuable insights to optimize your rest with the Garmin Forerunner 255S smartwatch. Receive a comprehensive sleep score that evaluates various factors impacting your sleep, and access advanced sleep monitoring features that track your sleep stages, heart rate, stress levels, Pulse Ox saturation, and respiration. This comprehensive sleep analysis empowers you to make informed decisions to improve your sleep habits and overall well-being.
  • Stay informed about your menstrual cycle or pregnancy and access exercise and nutrition education with the women’s health tracking feature.

Garmin Forerunner 255S smartwatch advantages

Garmin Forerunner 255S smartwatch advantages are:

  • Enjoy the convenience of over 30 built-in sports apps, including cycling, open-water swimming, strength training, and more.
  • Monitor the power you exert while running with the wrist-based running power feature, allowing you to manage your effort and fine-tune your training.
  • Plan your race day strategy with GPS-based pace guidance for a selected course or distance using the PacePro feature.
  • Acute Load: Compare your recent training load to the optimal range.
  • With Garmin Forerunner 255S smartwatch, you can assess the impact of your workouts on your endurance, speed, and power with the training effect feature.
  • Receive real-time analysis of your pace and heart rate to evaluate your current performance condition while running.
  • Measure crucial running metrics such as cadence, stride length, ground contact time, and more with the wrist-based running dynamics feature of this Garmin Forerunner 255S smartwatch.
  • Wrist-Based Heart Rate: Monitor your heart rate constantly to gauge your exertion levels during activities.
  • Utilize the pulse ox sensor to track your blood oxygen saturation during awake and sleep periods and gain awareness of your adaptation to altitude.
  • Track your moderate and vigorous activity minutes with the Intensity Minutes feature.
  • Stay informed about your stress tracking levels and gain insights into whether you’re having a calm, balanced, or stressful day.
  • Utilize the Health Snapshot feature of the Garmin Forerunner 255S smartwatch to capture important health metrics in a 2-minute session. Record key stats such as heart rate1, heart rate variability, Pulse Ox2 saturation, respiration, and stress levels. Afterwards, generate a comprehensive report that includes these stats, allowing you to easily share and review the data through the Garmin Connect app on your compatible smartphone. This valuable feature provides a snapshot of your overall health and helps you gain insights into your well-being.
  • Benefit from superior positioning accuracy and optimized battery life with SATIQ technology and multi-band GPS.
  • Ensure your safety and receive assistance in case of an incident with the safety and tracking features that send your live location when activated.
  • Stay connected with smart notifications, receiving emails, texts, and alerts on your Garmin Forerunner 255S smartwatch when paired with your iPhone® or Android smartphone.
  • Enable Livetrack to allow your friends and family to follow your real-time location and view preplanned courses.
  • Keep track of your health and fitness information, connect with friends, and more using the free Garmin Connect app with no subscription required.
  • Customize your Garmin Forerunner 255S smartwatch with watch faces, data fields, and apps from the Connect IQ platform.

Our final opinion about Garmin Forerunner 255S smartwatch

The Garmin Forerunner 255S is a great choice for runners looking for a lightweight, affordable, and accurate running smartwatch. Its GPS tracking is extremely accurate, and its training features are intuitive, user-friendly, and powerful. The watch’s multiple data screens and interchangeable bands make it a great customizable product. Along with its useful battery life and convenient activity tracking, the Garmin Forerunner 255S is a great pick for anyone looking for a reliable running watch.

FAQ - Frequently asked question about Garmin Forerunner 255S smartwatch?

The Garmin Forerunner 255S is generally well-regarded by athletes and fitness enthusiasts alike. It offers a user-friendly interface, an excellent range of features for tracking and measuring physical activity, and long battery life. It includes features such as GPS, altimeter, heart rate monitor, step counter, swim tracking, and sleep tracking. Additionally, it can sync with compatible devices such as smartphones to keep track of workouts and other activities.

Garmin Forerunner 255S is a great choice for runners and fitness enthusiasts. It provides accurate and detailed tracking and metrics, excellent battery life, and a lightweight, comfortable design. Additionally, it includes navigational features such as map routes and running dynamics which can help guide you during a run. Garmin Forerunner 255S will provide a dynamic running experience, improve your performance, and help you reach your fitness goals.

Garmin Forerunner 255S is ideal for runners, joggers, and athletes who are looking for efficient tracking of their activity levels and performance. It is also a great device for those who are looking to monitor their heart rate and distance traveled. The device is designed to provide real-time feedback and metrics to assist users in achieving their fitness goals.

It appears customers overall are satisfied with the Garmin Forerunner 255S. Many customers say it has excellent features such as GPS, customized workouts, and automatic monitoring of activities. Most customers also report that it is easy to use and effective at tracking their progress.

Garmin Forerunner 255S smartwatch technical specifications

Garmin Forerunner 255S smartwatch technical specifications are:


Lens MaterialCorning Gorilla Glass 3
Bezel Materialfiber-reinforced polymer
Quick Release bands(18 mm, Industry standard)
Strap materialsilicone
Physical size
  • 41 x 41 x 12.4 (mm)
  • Fits wrists with a circumference of 110-175 mm
Color displayYes
Display Size1.1″ (27.5mm) Diameter
Display resolution218 x 218 pixels
Display Typesunlight-visible, transflective memory-in-pixel (MIP)
Weight39 g
Battery life
  • Smartwatch mode: Up to 12 days
  • GPS-only GNSS mode: Up to 26 hours
  • All-Systems GNSS mode: Up to 20 hours
  • All-Systems GNSS mode plus Multi-Band: Up to 13 hours
Water rating5 ATM
Memory/History4 GB

Running Features

Available run profilesRunning, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running, Ultra Running
GPS-based distance, time and paceYes
Running dynamicsYes (with compatible accessory)
Vertical oscillation and ratioYes (with compatible accessory)
Ground contact time and balanceYes (with compatible accessory)
Stride length (real time)Yes (with compatible accessory)
Cadence (provides real-time number of steps per minute)Yes
Running powerYes (with compatible accessory)
Performance conditionYes
Lactate thresholdYes (with compatible accessory)
PacePro Pacing StrategiesYes
Run workoutsYes
Race predictorYes
Course- and weather-specific race predictorYes
Foot pod capableYes

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