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Forerunner 255S

4.590361445783133 out of 5 stars
83 Reviews

Out of Stock

Don't worry though, we have a lot more Men's Sport Watches in stock than that.

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Why We Like The Garmin Forerunner 255S

Positioned as a mid-tier smartwatch option from Garmin, the Forerunner 255S lets us dial in our running and training efforts with a low-profile device. Designed with the same feature set as the Forerunner 255, the 255S has a slightly smaller display and lighter design that stays out of the way during dynamic exercise. This watch provides all of the features we need to push further, with built-in race training features, pace management tools, and even settings to help regulate our caloric intake. It’s packed with adventure-ready features for a wide range of disciplines, with a multi-band GPS, submersible design, and cycling-focused features for mountain biking and road cycling.


  • Workhorse smartwatch lets us push our training to the next level
  • PacePro feature provides grade-adjusted visuals for accurate pacing
  • Bluetooth, Garmin Connect, and ANT+ connectivity
  • Submersible rating of 5ATM for watersports
  • Corning Gorilla Glass 3 offers resilient durability
  • Sleep score data lets you know when you’re at your best
  • Smartwatch mode offers a 12-day battery life
  • Please see size chart for complete list of technical features
  • Item #GRMF03N
Housing Material
fiber-reinforced polymer
Strap Material
Face Material
Corning Gorilla Glass 3
barometric altimeter
barometric altimeter
Heart Rate Monitor
wrist-based, constant
Technical Features
see size chart
Bluetooth, ANT+, Garmin Connect
Date Indicator
Weekday Indicator
alarm clock
Battery Type
lithium ion battery
Battery Life
[smartwatch mode] 12 days, [GPS-only GNSS mode] 26 hours, [all-systems GNSS] 20 hours, [all-systems GNSS plus Multi-Band] 13 hours
Claimed Weight
1.4oz (39g)
Manufacturer Warranty
1 year
Face Size
[diameter] 1.1in (27.5mm)
running, training, travel, casual, hiking, skiing, snowboarding, road cycling, mountain biking, swimming

Overall Rating

4.5 based on 83 ratings

Review Summary

1 Stars - 4 reviews
2 Stars - 0 reviews
3 Stars - 3 reviews
4 Stars - 12 reviews
5 Stars - 64 reviews

What do you think about this product?


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5 out of 5 stars

June 2, 2024

I love my Garmin, so much more than my Apple Watch

I bought my watch 2 weeks ago. So happy. I love the GPS map after a walk


Originally reviewed on Garmin

5 out of 5 stars

May 31, 2024

Perfect for a busy mom!

I received this on Mother's Day after much research. I couldn't've been happier with it, even if I had not researched and had such high expectations! The female-centered aspects (the size, the cycle tracking, the pregnancy mode) are all so well thought through. This, coupled with the ability to get notifications and answer phone calls, have been so helpful in my day-to-day as a mom of small kiddos. I can receive texts while swimming or running with the bike. It reminds me to take it easy some days when I let the stress get to me or the girls keep me up late. And on top of this - it's really freakin' cute.


Originally reviewed on Garmin

5 out of 5 stars

May 28, 2024


My son got this for me for Mothers Day!!!! I love it all though I am still learning about it!


Originally reviewed on Garmin

5 out of 5 stars

May 27, 2024

Love the features and integration

Brought this 3 weeks ago and love the features and integration with 3rd party apps for my triathlon training with TriDot and Garmin triathlon and run training.


Originally reviewed on Garmin

5 out of 5 stars

May 27, 2024

Great upgrade from old Forerunner 35

Expanded capabilities. Downloaded scenic watchmaker that adds lot of info on face. Very satisfied. Deal breaker for me over Samsung smartwatch was superior water resistance and longer lasting battery. Who wants something else to charge every night!


Originally reviewed on Garmin

5 out of 5 stars

May 7, 2024


I bought this a few weeks ago after my Sense just up and quit working. I refused to go back to Fitbit or Google products after they did us wrong. The Forerunner 255S is everything that I have wanted in a tracker/smartwatch. I wasn't planning on loving it to be honest, but I'm obsessed. The features are great! My only complaint is the appearance. I work in a professional setting and it isn't very pretty. That being said, the quality is beyond amazing and the connectivity compared to Google/fitbit is in a whole other realm. Definitely worth the cost, but I'm glad I didn't go for any of the others because I don't know that I would use any additional features. I love that I have the training, maps, tracking, music, etc.


Originally reviewed on Garmin

5 out of 5 stars

April 30, 2024

Great Watch

I purchased this watch over a month go and it was an upgrade from a 245. I love the additional features and the morning report it gives me. The satellite finder seems to be faster than in the 245, so I don't feel like I have to stand outside so long before the watch is ready to go. With the enhanced information technology, I feel like I get better recommendations for workout from the watch. I know I'm just getting to know all the capabilities on this watch and I look forward to learning and playing more with all it can do!


Originally reviewed on Garmin

5 out of 5 stars

April 23, 2024

Exactly What I needed

I needed to replace my Garmin Forerunner 35. Which served me well for many years. I want my new watch to track multiple activities, particularly Pool and Open Water Swim. This watch does that and more. I am now tracking hiking, cardio, strength and yoga. The watch is a nice size, not too big for my small wrist. Not too hard to figure out the buttons, and how to select workouts. I did wait to get the watch on sale, which was a big plus on my limited income. I absolutely love this watch


Originally reviewed on Garmin

5 out of 5 stars

April 18, 2024

So Much Better Than Fitbit!

The Garmin Forerunner 255S replaced my Fitbit Charge 5. I was a loyal Fitbit user for years, but numerous significant issues led me to search for a better product. I have had my Garmin for about a month and am absolutely loving it. My research paid off. The quality and quantity of data is SO much better and I receive helpful notices that assist me in increasing positive activities based on my readings. I previously logged my nutrition via the Fitbit app, but I switched to MyFitnessPal and was thrilled to discover that they can share my calories, etc. with Garmin. MyFitnessPal’s database and ease of use are far superior to the Fitbit app which frequently froze or shut down while I was trying to log my food intake. My only wish is that I had switched to Garmin years ago! I highly recommend Garmin and MyFitnessPal!


Originally reviewed on Garmin

5 out of 5 stars

April 15, 2024

Love it!

Bought my first ever Garmin watch and I love it! I would say it pretty accurate for the mileage. Was able to link my Strava to it so no need to start both! I’m so happy I went with this and not an Apple Watch


Originally reviewed on Garmin