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Garmin
Forerunner 255S

4.661870503597123 out of 5 stars
139 Reviews

Out of Stock

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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.


Details

  • 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
silicone
Face Material
Corning Gorilla Glass 3
Movement
digital
Altimeter
barometric altimeter
Barometer
barometric altimeter
Heart Rate Monitor
wrist-based, constant
Technical Features
see size chart
Wireless
Bluetooth, ANT+, Garmin Connect
Date Indicator
yes
Weekday Indicator
yes
Alarms
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
Includes
charger
Claimed Weight
1.4oz (39g)
Manufacturer Warranty
1 year
Face Size
[diameter] 1.1in (27.5mm)
Submersible
5 ATM
Activity
running, training, travel, casual, hiking, skiing, snowboarding, road cycling, mountain biking, swimming

What do you think about this product?

Overall Rating

4.5 based on 139 ratings

Review Summary

1 Stars - 5 reviews
2 Stars - 0 reviews
3 Stars - 4 reviews
4 Stars - 19 reviews
5 Stars - 111 reviews

Customer Images

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5 out of 5 stars

March 31, 2025

Lightweight with excellent capabilities for tracking running, all outdoor endeavors, and daily living metrics such as HRV and strain/stress.

Peter D
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

March 27, 2025

Perfect for fitness

This watch is great for tracking my fitness progress and goals. Took me some time to figure out the settings and how to manage the notifications. I do not like that I need to have two different apps (Connect & IQ) downloaded on my phone in order to customize my watch. Overall happy with this purchase though.

Megan L
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

March 22, 2025

Perfect Ugrade

I had the Garmin 55 and wanted more training features and more workout options, since we do a lot of hiking and I feel that is a different enough workout from a walk to warrant its own category and this watch DELIVERED! It’s super lightweight, smaller than my previous, but more screen space. The buttons are easier to manipulate and the battery holds up so much better! The in-workout stats I can view are superb and I can’t wait to get more into my training to see how I improve.

user image
radRuns22

Originally reviewed on Garmin

5 out of 5 stars

February 7, 2025

Great smaller watch!

Full disclosure: I have not used this watch in training YET. I bought it right after I had surgery for a femoral hernia, and I have not started training again yet. I race sprint triathlons and compete in martial arts. This is a smaller watch for a smaller wrist, and I love the way it fits. The screens are very customizable, and I have set up the data fields to be ready when I start training again. I bought a nylon wristband. It stays wet for a couple of hours, so if you do a lot of swimming or sweating, you might prefer the silicone one that comes with the watch. I had used a Garmin Forerunner 735xt, which was a great watch, except it did not have Grade Adjusted Pace capabilities and this one does. I had bought another brand of watch in between, and when it started malfunctioning, I came right back to Garmin. This is a great watch for a serious amateur athlete!

Janniewalt

Originally reviewed on Garmin

3 out of 5 stars

January 31, 2025

Does not work on tattoos

I had a Garmin 245 for 3 years and the battery started to not last. I upgraded to a 255. after one day and a 20 mile run my battery already drops to 60%. I also have tattoos on my wrists and the HRM does not work AT ALL. I’ve tried it every way, even with the watch face facing in, it just doesn’t give me accurate stats.

user image
MystikDan

Originally reviewed on Garmin

5 out of 5 stars

January 29, 2025

I purchased the Garmin Forerunner 255S to replace my previous model Forerunner 225. This model has new features and capabilities that my last watch did not. I like the size of the screen and ease of programming. I enjoy the summary each morning and the recommended exercise prescription. I enjoy the wide range of exercises I am able to track.

Liz Z
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

January 27, 2025

Great watch for a variety of activities

This watch is easy to use and has everything you could want as a multi sport athlete. Connects easily to the Garmin app and has a great battery life.

Allyn H

Originally reviewed on Garmin

5 out of 5 stars

January 22, 2025

Taught me things I didn’t know!

This was gifted to me for Christmas. As an upgrade to my VivoActive 4. I thought I would miss the touch screen, and some moments I do, but all of the other features outweigh the rest. It truly is teaching me things I didn’t know and really helps me focus on what matters either in my run or recovery. Not to mention the batter lasts forever!

Cat03

Originally reviewed on Garmin

5 out of 5 stars

January 22, 2025

Lots of features

Upgraded from a Fitbit Versa 3. Many more features and more of a learning curve. YouTube videos were very helpful. Really like the ability to create custom workouts

jselam13

Originally reviewed on Garmin

5 out of 5 stars

January 22, 2025

Great size and function

I'm 6'0 tall and 180lbs, but I self admittedly have dainty wrists. I was torn between buying the regular 255 vs 255s, but went with the 255s and I'm glad I did. Loving the watch so far, great functions, very accurate GPS, and it feels great on my wrist.

hondapre90

Originally reviewed on Garmin

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