Forerunner 255S
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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
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 140 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageMay 1, 2025
Very Happy
I wasn’t sure at first because the face is smaller than I am used to, but once I got used to it I am loving all this little watch has to offer!!
Originally reviewed on Garmin
March 31, 2025
Lightweight with excellent capabilities for tracking running, all outdoor endeavors, and daily living metrics such as HRV and strain/stress.
Originally reviewed on ExpertVoice.com
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.
Originally reviewed on ExpertVoice.com
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.
Originally reviewed on Garmin
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!
Originally reviewed on Garmin
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.
Originally reviewed on Garmin
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.
Originally reviewed on ExpertVoice.com
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.
Originally reviewed on Garmin
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!
Originally reviewed on Garmin
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
Originally reviewed on Garmin
Do you have a question about this product?
This product can expose you to chemicals including Lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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