# What is the most water-resistant smartwatch with heart rate monitor available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the most water-resistant smartwatch with heart rate monitor available?

## Products

### Amazfit Active 2 Square (Premium)
```yaml
product: amazfit-active-2-square-premium
brand: Amazfit
price_gbp: 98.15
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
screen_size: 1.75
battery_life: up to 10 days
compatibility: Zepp OS; Android; iOS
water_resistance: 5 ATM
```

- **Price:** £98.15 [^1]
- **Summary:** The Amazfit Active 2 Square (Premium) is a GPS smartwatch with a 1.75 in sapphire protected AMOLED display and BioTracker 6.0 heart rate monitoring. It supports offline maps with turn-by-turn directions and includes up to 160 workout modes, with up to 10 days of battery life under typical use. It's aimed at fitness and multi-sport users who want long battery life and navigation without daily charging.
- **Ideal For:** For the most water-resistant smartwatch with a heart rate monitor, the Active 2 Square (Premium) is rated 5 ATM and uses BioTracker 6.0 for heart rate monitoring.
- **Additional Sources:** [^2], [^1], [^2]

### Garmin Venu 3 (010-02784-01)
```yaml
product: garmin-venu-3-010-02784-01
brand: Garmin
price_gbp: 264.27
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
screen_size: 1.4 in
battery_life: 14 days in smartwatch mode
compatibility: Bluetooth compatible phone
water_resistance: 5 ATM swim
```

- **Price:** £264.27 [^3]
- **Summary:** Garmin Venu 3 is a health and fitness smartwatch with a 1.4 in AMOLED touchscreen display, built-in sports and wellness features, and a battery rated up to 14 days in smartwatch mode. It supports swim-rated water resistance (5 ATM) and includes navigation with All Systems GNSS.
- **Ideal For:** For maximum water resistance with a heart rate monitor, the Venu 3 is rated swim 5 ATM and includes wrist-based heart rate monitoring plus All Systems GNSS for outdoor tracking.
- **Additional Sources:** [^4], [^3], [^4]

### Huawei Watch Fit 3
```yaml
product: huawei-watch-fit-3
brand: Huawei
price_gbp: 52.09
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
screen_size: 1.82 in
battery_life: 10-day maximum battery life
compatibility: Android 8.0 or later and iOS 13.0 or later
water_resistance: 5 ATM
```

- **Price:** £52.09 [^5]
- **Summary:** The Huawei Watch Fit 3 is a slim fitness-focused smartwatch with an AMOLED 1.82 in display, built-in GPS, and heart-rate monitoring. It's rated 5 ATM for water resistance and is designed for long battery life, with up to a 10-day maximum battery life in Huawei's test conditions. It works with both Android and iOS.
- **Ideal For:** For the most water-resistant smartwatch with a heart rate monitor available, the Watch Fit 3 is rated 5 ATM and includes an optical heart rate sensor.
- **Additional Sources:** [^6], [^7], [^5], [^6], [^7]

---
## References & Sources
[^1]: Amazfit (Official Store), accessed 2026-06-24. https://us.amazfit.com/products/active-2-square
[^2]: Best Buy, accessed 2026-06-24. https://www.bestbuy.com/product/amazfit-active-2-sqaure-smartwatch-44mm-premium-black-2025/J3R85LLRLY
[^3]: Best Buy, accessed 2026-06-24. https://www.bestbuy.com/product/garmin-venu-3-gps-smartwatch-45-mm-fiber-reinforced-polymer-stainless-steel-and-black-2023/JXF9YF42RW
[^4]: The Home Depot, accessed 2026-06-24. https://www.homedepot.com/p/Garmin-Venu-3-Fitness-Smartwatch-with-Stainless-Steel-Bezel-and-Silicone-Band-1-8-x-47-in-Black-010-02784-01/335686228
[^5]: Argos, accessed 2026-06-24. https://www.argos.co.uk/browse/technology/mobile-phones-and-accessories/smart-watches/c:30144/brands:huawei/
[^6]: TechRadar deal page (Amazon listing), accessed 2026-06-24. https://www.techradar.com/health-fitness/smartwatches/ditch-the-apple-watch-get-this-feature-packed-huawei-watch-fit-3-for-a-record-low-price
[^7]: Currys (Ireland), accessed 2026-06-24. https://www.currys.ie/products/huawei-watch-fit-3-silver-with-white-fluoroelastomer-strap-10262885.html