






⏱️ Elevate every run with smarter training and unstoppable battery life
The Garmin Forerunner® 255S is a compact, powder gray GPS running smartwatch designed for serious athletes and fitness enthusiasts. Featuring multi-GNSS support, adaptive training plans, and advanced health metrics, it offers up to 12 days of battery life in smartwatch mode and 26 hours in GPS mode. Water resistant to 50 meters and equipped with a sunlight-visible display, it’s built to keep pace with your toughest workouts and races.

























| ASIN | B09WTSKRTN |
| Additional Features | Charge less, train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode, Get an overview of your sleep, HRV status and daily workout with morning report, Plan your strategy with daily suggested workouts, course details and more on the race widget, Push your limits with a built-in triathlon feature and 30+ activity profiles, Utilize a full suite of advanced metr… |
| Age Range Description | Adult |
| Band Color | grey |
| Band Length | 22 centimeters |
| Band Material Type | Silicone |
| Band Width | 18 millimeters |
| Battery Average Life | 12 days |
| Battery Capacity | 200 milliamp_hours |
| Battery Cell Type | Lithium Ion |
| Battery Power | 200 milliamp_hours |
| Best Sellers Rank | #16,594 in Electronics ( See Top 100 in Electronics ) #392 in Smartwatches |
| Brand | Garmin |
| Built-In Media | Forerunner 255/255s; Charging/data Cable; documentation |
| Case Material Type | Fiber-reinforced polymer |
| Clasp Type | Tang Buckle |
| Closure Type | Buckle |
| Color | Powder Gray |
| Communication Feature | Notification |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Android Devices, iOS Devices |
| Connectivity Technology | Bluetooth, USB |
| Controller Type | Touch Control |
| Customer Reviews | 4.7 out of 5 stars 1,595 Reviews |
| Display Type | Sunlight-visible, transflective memory-in-pixel (MIP) |
| GPS Geotagging Functionality | Built-in GPS |
| Global Trade Identification Number | 00753759279851 |
| Human Interface Input | Buttons |
| Item Dimensions | 1.6 x 1.6 x 0.49 inches |
| Item Type Name | Running Smartwatch |
| Item Weight | 1.4 ounces |
| Manufacturer | Garmin |
| Memory Storage Capacity | 4 GB |
| Metrics Measured | Calories Burned, Heart Rate, Hydration, Sleep Coach, Stress |
| Model Name | Forerunner 255 |
| Model Number | 010-02641-02 |
| Operating System | Android |
| Resolution | 218 x 218 |
| Screen Size | 1.81 inches |
| Shape | Round |
| Sim Card Size | eSIM |
| Special Feature | Charge less, train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode, Get an overview of your sleep, HRV status and daily workout with morning report, Plan your strategy with daily suggested workouts, course details and more on the race widget, 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 Special Feature Charge less, train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode, Get an overview of your sleep, HRV status and daily workout with morning report, Plan your strategy with daily suggested workouts, course details and more on the race widget, 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 See more |
| Sport Type | Exercise & Fitness, Outdoor Lifestyle, Running, Track & Field, Training |
| Style Name | Non-Music |
| Supported Application | GPS |
| Supported Satellite Navigation System | GPS |
| UPC | 753759279851 |
| Unit Count | 1 Count |
| Warranty Description | 1 year limited warranty |
| Warranty Type | Limited |
| Water Resistance Depth | 50 meters |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Watch |
| Wireless Communication Standard | Bluetooth |
| Wireless Compability | Bluetooth |
| Wireless Provider | Unlocked |
C**O
Excellent Upgrade from the Forerunner 745
I’ve been a Garmin user for over 10 years, and I upgraded from the Forerunner 745 to the Forerunner 255. This is an excellent upgrade and immediately feels like a more refined and capable watch. The 255 is lighter and more comfortable to wear all day, and the battery life is noticeably better than the 745. I’m also seeing improved GPS accuracy and more consistent tracking overall. The updated metrics, including HRV status and the newer training insights, provide more useful data to support training and recovery. Performance is smooth, reliable, and exactly what I expect from Garmin. It keeps everything I liked about the 745 while improving the areas that matter most, especially battery life, comfort, and tracking accuracy. If you’re coming from the 745, the Forerunner 255 is absolutely a worthwhile upgrade. Highly recommended.
M**S
This thing is next level!
I really am enjoying this watch. I'll start off by saying it I used to have an Apple watch but no longer have an iPhone so I was looking for an alternative. I've used Fitbit and apple watches and feel they are accurate at tracking things like heart rate and GPS. This watch feels the most accurate out of both of those. The Garmin app isn't as pretty and easy to use as Fitbit but the quality and information is so much better. Also the customization of this watch is insane. From multiple backgrounds to the way you can set up what information you want to see during any given workout is awesome. As you can tell by my watch face there is a great amount of information just by looking at the first screen and more if you scroll around. This is the 46mm case size and I really think it's the perfect balance between being able to see the information and not being too bulky. Obviously the tranflective display is not as pleasing as an AMOLED display like and apple watch, galaxy watch, pixel watch, or Garmins own venu or epix watches but it honestly is not that bad. Also I've heard of bad backlight reviews on the Garmin watches where the screen looks washed out and blue when the backlight is on and I think I got a good one. It's almost been two weeks and I'm still at 67% battery life. I have yet to swim with the watch but it feels like good quality and the gps has been accurate on my runs. I was thinking of getting a Fenix 6 since they are much cheaper now but the features and less bulkiness of this Garmin Forerunner 255 sold me. The gray color is okay but I might end up going with a different band style and color in the future. The video taken with the backlight on is with the brightness at 20%. Take your fitness goals to the next level and get this watch!
J**S
Very satisfied with purchase and battery life.
I previously had a Garmin 235 that I had bought used, and it died. I finally bought myself a new Garmin. This thing is great, very basic, but solid and very accurate with the GPS. Battery life is awesome at 14+ days when not using GPS. It dips faster when you use it for running/volleyball, etc, but still gets like over a week when I'm working out 6-7 days before needing a charge. Holds battery way better than Apple watches, etc. Text, and messenger notifications come through great on the watch as well.
A**2
Uninterrupted Performance, Highly Reliable & Very Comfortable!
The Garmin Forerunner® 255S has truly become my absolute favorite smartwatch and has been a key tool through my fitness journey, here's why I love it: Adapting to My Workouts: Although labeled as a running smartwatch, it effortlessly fits into my diverse workout routine. Whether I'm hitting the gym, practicing yoga, or going for a nature walk, it tracks my progress with accuracy. Feels Like Nothing: The lightweight design is a game-changer. During workouts and even during sleep, I barely notice it's there, allowing me to focus solely on my routines. Accurate Insight: From heart rate monitoring to sleep tracking, it offers insights that help me tailor my workouts effectively and monitor my health data reliably and easily. Knowing I can rely on its data keeps me motivated. Part of My Day: Its sleek profile and customizable faces make it not just a workout companion, but an everyday accessory that reflects my style. No Worries About Charging: One thing I appreciate is its impressive battery life. It's a relief knowing I can wear it all day without needing to recharge constantly. For my use, it lasts 11 days before needing a charge. When It does need charging, it charges FAST! In short, the Garmin Forerunner® 255S is more than a gadget; it's a personal fitness partner. It adapts to my routine, offers accurate insights, and feels like a natural extension of my active lifestyle. Whether I'm lifting weights or running errands, it's a constant companion that helps me stay on track and motivated. I highly recommend this watch!
M**A
Get this watch
I’ve been using the Garmin Forerunner 255 for a few months now, and I’m genuinely impressed. It strikes a great balance between advanced performance features and everyday usability. The GPS accuracy is top-notch, thanks to the dual-frequency support, and I’ve had no issues with tracking even in areas with spotty reception like wooded trails or city streets. Battery life is a huge plus—it easily lasts close to two weeks in smartwatch mode and over a day with continuous GPS. The design is lightweight and comfortable for all-day wear, including during sleep tracking, and the five-button interface is simple and responsive (though I do sometimes miss having a touchscreen). Training features are where this watch really shines. It supports multiple sports modes, heart rate variability, stress tracking, and Garmin’s “Body Battery” to gauge overall energy levels. The race predictor, morning report, and recovery time estimates are surprisingly useful. Sleep tracking is detailed and generally accurate, and syncing with the Garmin Connect app is smooth. My only minor complaint is that you need the Music version if you want onboard music storage; otherwise, you're just controlling your phone’s playback. Also, no touchscreen might be a con for some, but the physical buttons work great in sweaty or wet conditions.
K**D
Absolutely love this watch as an activity and wellness tool
I am not a runner but I have been considering a Garmin watch for a long time because I am usually an active hiker. I haven't been as active for a while and I feel like the wellness tracking this device offers is helping me back on track. This has been one of those purchases that I wish I had pulled the trigger on sooner now that I have it. Combined with the web app I really love the amount of detail that I can get and the variety of things I can easily track. I've found the GPS tracking on my longer walks to be very accurate so far. I also enjoy the variety of customization options both native to the watch and through Connect IQ score. I know that the sleep, stress, body battery, etc, are not the most accurate, but they are still a great tool for getting a rough idea of where I can improve. For me, being called out by something as neutral as data is very helpful and I appreciate being able to see trends and make note of things that I could change for the better. I do have to take some of the body measurements with a grain of salt because of medications that I take, like the HRV-based stress readings (always high for me), so you should take that into consideration if you are prescribed any kind of medication that either stimulates or sedates. I am so glad I went with the smaller model, I am a petite person and it feels like the perfect size for my wrist. I don't find it to be obtrusive at all. I don't love the silicone band and went with an alternative that looks better at the office and doesn't bother my skin as much.
M**N
Great running metrics.
Great watch for runners. Sleep tracking not as accurate as other watches. Running metrics such as pace, stride length, hr, power are helpful info for improvement.
S**S
Ironman Watch!
I just completed my first Ironman 140.6 with the Garmin Forerunner 255. This watch is SOLID! Long workouts. Ironman 70.3 races. Ironman 140.6 races. This watch never hiccups or runs out of battery. It does the job.
Q**N
much better comparing with old 245
used to own garmin 245 Music. switch to 255 as old one lost. bigger screen, and nice apps. turn on bluetooth, and hopefully it can last 9 days.
X**T
Que es como un ordenador
Que es un reloj super, me encanta y de momento va perfecto
I**.
Ha llegado bien y a tiempo,
Todo correcto, ha tardado en llegar 2 dias menos de lo previsto, el reloj perfecto, va como tiene que ir, gps, mapas, etc. muy bien
J**Z
Excelente si haces triatlón
Si te quieres poner serio con tus entrenamientos necesitas uno si o sí, registrar todos tus entrenamientos es un paso importante para medir tu avance llevo ya 3 meses con el y junto con la aplicación Garmin Connect el producto se vuelve único, no sólo el reloj si no el ambiente completo, hice mi primer triatlón y quedé en noveno lugar, tiene todo lo necesario para marcar tu ritmo, tu paso, las transiciones etc. Te recomiendo comprar además la Banda HRM Pro+ para medir de mejor manera tus entrenamientos corriendo y nadando y si tu presupuesto te lo permite los pedales para bicicleta con potenciómetro. Tener un ambiente Garmin completo te permite medir absolutamente todo. Hablando de este reloj tiene todo lo que necesitas si quieres hacer triatlón, o solo correr, nadar o hacer ciclismo. Mide horas de sueño, estado de VFC, oxigenación en sangre, nivel de estrés, etc. Una vez que lo uses verás que las prestaciones de este reloj son todo lo que necesitas, por mi parte lo usaré un año más para después brincar un 965. Pero te juro que este reloj es perfecto.
B**Z
Lo amo
Tenía el Garmin Forerunner 55, este fue un gran upgrade. Estoy maravillada con el reporte diario, con el seguimiento puntual al sueño y al estado de entrenamiento. Me gusta mucho los detalles. Gran compra, súper recomiendo.
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