Garmin Forerunner 165 GPS Running Watch (Black / Slate Grey)
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Our quick verdict
A well-reviewed first running watch with a bright AMOLED screen, €17 to €22 cheaper at Decathlon than at three other Irish shops on 9 November 2026. Promotion runs to 30 November.
Great for
- Runners who want a bright touchscreen, GPS and coaching
- Anyone upgrading from a basic watch
Skip it if
- You want music on the watch (get the Music version)
- You need advanced metrics from the Forerunner 265
The Garmin Forerunner 165 is a GPS running watch with a bright AMOLED touchscreen, built-in GPS and up to 11 days of battery in smartwatch mode. It’s €178 at Decathlon Ireland, cheaper than the other Irish shops we compared on 9 November 2026.
Key features
- AMOLED touchscreen plus buttons
- Pace, distance and heart rate with Training Readiness and Training Effect
- Free Garmin Coach training plans and adaptive workouts
- Up to 11 days in smartwatch mode, 19 hours in GPS mode
- Smart notifications and Garmin Pay
- Water-resistant to 50m
- 2-year warranty and 365-day returns for Decathlon members
What reviewers say
TechRadar calls the Forerunner 165 a fantastic first running watch, with accurate GPS, a beautiful screen and battery that lasts over a week with regular runs. The trade-offs: music needs the more expensive Music version, and some advanced metrics from the Forerunner 265 are missing. Decathlon’s Irish site shows 4.8 out of 5 from 629 customer reviews (9 November 2026).
Source: TechRadar (Forerunner 165 review).
Good to know in Ireland
- Price comparison for the black/slate grey Forerunner 165, checked 9 November 2026: Decathlon €178.00; Kean’s €195.00; Expert.ie €199.99; 53 Degrees North €200.00.
- Decathlon lists the promotion from 8 to 30 November 2026.
- Sold and shipped by Decathlon Ireland; members get 365 days to return Decathlon products.
- This is the version without music storage (the Forerunner 165 Music costs more).
Product image: © Decathlon, from the shop’s official website.
Pros and cons
What we like
- Bright AMOLED touchscreen
- Accurate built-in GPS
- About 11 days battery as a smartwatch
- Garmin Coach plans
Watch out for
- No music storage on this version
- Fewer advanced metrics than the Forerunner 265
- Plastic case
Specifications
| Screen | AMOLED touchscreen, 43mm |
|---|---|
| Battery | Up to 11 days (smartwatch), 19 hours (GPS) |
| GPS | Built-in |
| Heart rate | Wrist-based |
| Water resistance | 50m |
| Music | No |
Questions people ask
How long does the offer last?
Decathlon lists the promotion until 30 November 2026.
How do you know it’s cheaper?
We compared the black/slate grey Forerunner 165 at four Irish shops on 9 November 2026: Decathlon €178.00, Kean’s €195.00, Expert.ie €199.99 and 53 Degrees North €200.00.
Does it play music?
Not this version; the Forerunner 165 Music does.
