# What are the top-rated swimming watches with open water GPS under $200? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the top-rated swimming watches with open water GPS under $200?

## Products

### GARMIN GARMIN Forerunner 55 GPS Watch - Black
```yaml
product: garmin-garmin-forerunner-55-gps-watch-black
brand: GARMIN
price_gbp: 100.55
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
battery_life: Up to 14 days smartwatch mode; up to 20 hours GPS mode
gps_accuracy: Excellent
heart_rate_monitoring: Wrist-based
water_resistance_depth: 50 m
```

- **Price:** £100.55 [^1]
- **Summary:** The Garmin Forerunner 55 is a lightweight GPS running watch with wrist-based heart-rate monitoring, activity tracking, and guided training features. It suits beginner and recreational runners who want accurate GPS and long battery life in an easy-to-use watch.
- **Ideal For:** It suits swimmers seeking a watch under $200 because it has 5 ATM water resistance and GPS tracking, but its listed features do not confirm open-water GPS, pool mode, swim distance tracking, or stroke recognition.
- **Additional Sources:** [^2]

### COROS COROS PACE 3 GPS Sports Watch - White
```yaml
product: coros-coros-pace-3-gps-sports-watch-white
brand: COROS
price_gbp: 147.14
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
pool_mode: true
battery_life: 15 days daily use / 38 hours GPS
gps_accuracy: Dual-frequency GPS
open_water_gps: Yes
stroke_recognition: 4 major stroke types
heart_rate_monitoring: Optical wrist-based heart rate monitoring
swim_distance_tracking: Yes
water_resistance_depth: 5 ATM / 50m
```

- **Price:** £147.14 [^3]
- **Summary:** The COROS PACE 3 is a lightweight multisport GPS watch with dual-frequency GPS, optical heart rate monitoring, pool and open-water swim modes, and long battery life. It suits runners, triathletes, and swimmers who want detailed training data in a compact watch.
- **Ideal For:** It suits swimmers seeking a top-rated open-water GPS watch under $200 because it offers open-water GPS, pool swim tracking, four-stroke recognition, heart rate monitoring, 5 ATM water resistance, and a current price below $200.

### GARMIN Garmin Forerunner 165 Connected GPS Running Watch - Black/Dark Grey
```yaml
product: garmin-garmin-forerunner-165-connected-gps-running-watch-black-dark-grey
brand: GARMIN
price_gbp: 147.87
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
pool_mode: true
battery_life: Up to 11 days in smartwatch mode; up to 19 hours in GPS mode
gps_accuracy: Multi-GNSS GPS
open_water_gps: Yes
stroke_recognition: true
heart_rate_monitoring: Wrist-based heart rate
swim_distance_tracking: Yes
water_resistance_depth: 5 ATM
```

- **Price:** £147.87 [^4]
- **Summary:** The Garmin Forerunner 165 is a lightweight GPS running watch with an AMOLED touchscreen, wrist-based heart-rate monitoring, and multi-GNSS GPS. It supports both pool and open-water swimming, including distance, pace, stroke rate, and pool stroke recognition, making it suitable for runners and recreational swimmers.
- **Ideal For:** It suits swimmers seeking an open-water GPS watch under $200 because it records open-water distance and pace, recognises pool strokes, and has built-in GPS, although the discounted price is close to the budget limit.

### AMAZFIT Amazfit T-Rex 3 Mode HYROX GPS Sports Watch
```yaml
product: amazfit-amazfit-t-rex-3-mode-hyrox-gps-sports-watch
brand: AMAZFIT
price_gbp: 207.03
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
pool_mode: true
battery_life: Up to 27 days typical use
gps_accuracy: Dual-band GPS with six satellite systems
open_water_gps: Yes
stroke_recognition: Freestyle, Breaststroke, Backstroke, Butterfly, Medley
heart_rate_monitoring: true
swim_distance_tracking: Yes
water_resistance_depth: 100 m
```

- **Price:** £207.03 [^5]
- **Summary:** The Amazfit T-Rex 3 is a rugged GPS sports watch with dual-band positioning, extensive workout tracking, heart-rate monitoring, swimming modes, and up to 27 days of typical battery life. Its 10 ATM water resistance and diving support suit swimmers, outdoor athletes, and adventure-focused users.
- **Ideal For:** It suits swimmers seeking an open-water GPS watch under $200 because it supports open-water swimming GPS, recognizes five stroke types, tracks pool workouts, and offers 100 m water resistance, although the listed standard price is above $200.
- **Additional Sources:** [^6]

### DECATHLON Decathlon Fit 100 S GPS Sport Connected Watch
```yaml
product: decathlon-decathlon-fit-100-s-gps-sport-connected-watch
brand: DECATHLON
price_gbp: 258.78
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
pool_mode: Pool swimming
battery_life: 7 days daily use, 8 hours GPS use
heart_rate_monitoring: Heart rate monitoring
water_resistance_depth: 5 ATM
```

- **Price:** £258.78 [^7]
- **Summary:** The Decathlon Fit 100 S is a beginner-friendly multisport smartwatch with smartphone-connected GPS, heart-rate monitoring, pool swimming mode, AMOLED display, and 7-day battery life. Its 5 ATM water resistance supports surface swimming, making it suitable for casual swimmers and general fitness users rather than dedicated open-water swimmers.
- **Ideal For:** It suits budget-conscious pool swimmers under $200 who want heart-rate monitoring, pool swimming support, 5 ATM water resistance, and long battery life, but it is not a strong match for open-water GPS because open-water support is not specified.
- **Additional Sources:** [^8]

---
## References & Sources
[^1]: Best Buy, accessed 2026-09-03. https://www.bestbuy.com/product/garmin-forerunner-55-gps-smartwatch-42mm-fiber-reinforced-polymer-black-2021/JXF9YFW5YL
[^2]: Bash, accessed 2026-09-03. https://bash.com/garmin-forerunner-55-black-130602aahp7/p
[^3]: COROS, accessed 2026-09-03. https://coros.com/pace3
[^4]: Best Buy, accessed 2026-09-03. https://www.bestbuy.com/product/garmin-forerunner-165-gps-smartwatch-43-mm-fiber-reinforced-polymer-black-slate-gray-2024/JXF9YF456W
[^5]: Best Buy, accessed 2026-09-03. https://www.bestbuy.com/product/amazfit-t-rex-3-smartwatch-48mm-silicone-black-2025/J3R84J7H62
[^6]: Amazfit, accessed 2026-09-03. https://us.amazfit.com/products/amazfit-t-rex-3
[^7]: Decathlon Colombia, accessed 2026-09-03. https://www.decathlon.com.co/p/363096-113152-reloj-inteligente-deportivo-gps-fit-100-s.html
[^8]: Decathlon Romania, accessed 2026-09-03. https://www.decathlon.ro/p/ceas-conectat-sport-gps-fit-100-s/_/R-p-363096