Garmin Forerunner 255 vs Garmin Forerunner 965
The Verdict
Garmin's Forerunner 255 and 965 target different runner profiles with meaningful distinctions. Display quality separates them most noticeably: the 965 features a vibrant 454x454 AMOLED screen versus the 255's 260x260 MIP display, delivering superior clarity and color representation. Health tracking favors the 965, which adds skin temperature monitoring alongside SpO2 and heart rate sensors found in both. Battery longevity differs substantially: the 965 achieves 23 days in smartwatch mode compared to the 255's 14 days, though GPS performance is comparable at 31 and 30 hours respectively. Build quality improvements on the 965 include titanium bezel accents and enhanced water resistance (10 ATM vs 5 ATM). Software remains proprietary Garmin OS on both. At $349 versus $599, the 255 delivers excellent value for runners prioritizing essential metrics and durability, while the 965 justifies its premium through superior visuals, extended battery, comprehensive health data, and rugged construction. Choose the 255 for value-conscious runners; select the 965 for serious athletes demanding flagship features.
Who Should Buy
Buy the Garmin Forerunner 255 if…
- →14-day battery life means weekly charging at most
- →Multi-band GPS for exceptional outdoor tracking accuracy
- →Morning Report with daily training readiness and HRV status
Buy the Garmin Forerunner 965 if…
- →23-day battery life in smartwatch mode for serious endurance athletes
- →First Forerunner with AMOLED display — bright and easy to read
- →Multi-band GPS with SatIQ for highly accurate outdoor tracking
Category Scores
Pros & Cons
Garmin Forerunner 255
Pros
- 14-day battery life means weekly charging at most
- Multi-band GPS for exceptional outdoor tracking accuracy
- Morning Report with daily training readiness and HRV status
- Race Predictor estimates finish times for 5K to marathon
- Lightweight at 49 g and comfortable for 24/7 wear
Cons
- MIP display lacks the vibrancy of AMOLED competitors
- No touchscreen on base model — button-only navigation
- No ECG or blood pressure monitoring
- Limited smart features compared to Apple Watch or Wear OS
- Third-party app ecosystem is small
Garmin Forerunner 965
Pros
- 23-day battery life in smartwatch mode for serious endurance athletes
- First Forerunner with AMOLED display — bright and easy to read
- Multi-band GPS with SatIQ for highly accurate outdoor tracking
- Advanced running metrics: running power, VO2 max, race predictor
- Garmin Pay NFC and music storage for offline playback
Cons
- No ECG sensor
- No cellular connectivity
- Garmin OS app ecosystem is very limited compared to Wear OS or watchOS
- Expensive at $599 for a running-focused device
Full Specifications
| Spec | Garmin Forerunner 255 | Garmin Forerunner 965 |
|---|---|---|
| Software | Garmin proprietary OS | Garmin OS |
| Body | ||
| Weight | 49 g | 53 g |
| Case material | Fiber-reinforced polymer | Fiber-reinforced polymer with titanium bezel |
| Water resistance | 5ATM | 10 ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 14 days (smartwatch), 30 hrs GPS | Up to 23 days smartwatch mode, 31 hrs GPS |
| Display | ||
| Size | 46mm | 1.4 inch |
| Type | MIP (Memory-in-Pixel) transflective | AMOLED |
| Always-on display | ||
| Resolution | 260 x 260 | 454 x 454 |
| Processor | ||
| Chipset | Garmin custom SoC | Garmin proprietary |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.0 |
Related Comparisons
This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in smartwatches, see all Garmin products or all Garmin products. View full details for the Garmin Forerunner 255 or the Garmin Forerunner 965.