The best smartwatches for scuba diving are the ones that meet the EN13319 diving-accessory standard, carry a real depth sensor, and run a certified dive-computer app — not just a water-resistant wrist device. As of 2026, that short list is led by the Apple Watch Ultra 2 (with the Oceanic+ app), the Garmin Descent series (Mk3i, Mk3, and the more affordable Descent G1), and the Suunto Ocean. Each pairs decompression algorithms and freedive modes with everyday smartwatch features, so you get a genuine dive computer that also tracks your runs, sleep, and notifications.
[[AFFDISCLOSURE]]
- A “waterproof” rating like WR100 is not the same as being a certified dive computer — look for EN13319
- Apple Watch Ultra 2 handles recreational scuba to 40m and freediving via the subscription-based Oceanic+ app
- Garmin Descent supports multi-gas, gauge, apnea, and rebreather diving with optional tank-pressure integration
What makes a smartwatch actually “dive-capable”?
Plenty of watches survive a swim, but scuba and freediving demand far more than water resistance. According to manufacturer specifications, a dive-ready device generally needs three things:
- EN13319 certification. This European standard covers depth-measuring diving accessories, verifying the depth sensor and pressure tolerances used underwater.
- A dedicated depth/pressure sensor. Optical and barometric sensors alone can’t track descent; dive watches add a rated depth gauge (commonly to 40m for recreational use, deeper on pro models).
- A dive-computer app with real algorithms. Scuba requires no-decompression-limit (NDL) tracking, ascent-rate alerts, and safety-stop guidance; freediving needs fast surface/dive interval timing and depth alarms.
This is the key distinction most buyers miss. A rating like WR100 or 10 ATM describes water resistance under static conditions — it does not certify a watch for diving. We cover that gap in detail in our guide to smartwatch water-resistance ratings.
Best dive-capable smartwatches compared
The table below summarizes headline specifications published by each manufacturer. Depth ratings refer to the certified dive-use depth, which is usually shallower than the raw water-resistance rating.
| Model | Dive standard | Recreational scuba depth | Freedive/apnea mode | Air integration | Everyday smartwatch |
|---|---|---|---|---|---|
| Apple Watch Ultra 2 | EN13319, WR100 | To 40m (Oceanic+ app) | Yes (Oceanic+) | No | Full (watchOS) |
| Garmin Descent Mk3i | EN13319 | Multi-gas / gauge | Yes | Yes (SubWave, T-series transceiver) | Full (Garmin OS) |
| Garmin Descent Mk3 | EN13319 | Multi-gas / gauge | Yes | No (add-on limited) | Full (Garmin OS) |
| Garmin Descent G1 | EN13319 | Single/multi-gas nitrox | Yes | No | Yes (rugged, MIP display) |
| Suunto Ocean | EN13319 | Multi-gas nitrox | Yes | Yes (Tank POD) | Yes (fitness-focused) |
Apple Watch Ultra 2 + Oceanic+
The Ultra 2 is the most “normal” smartwatch of the group: it runs full watchOS, apps, and cellular. Its depth sensor and EN13319 certification unlock the free Depth app and, more importantly, the third-party Oceanic+ app, which turns it into a recreational scuba computer for dives to 40m and adds a freediving mode. Note that full Oceanic+ dive planning and unlimited logging require a subscription. Battery life is the main trade-off versus dedicated units — see our battery-life comparison for how the Ultra stacks up.
Garmin Descent (Mk3i, Mk3, G1)
Garmin’s Descent line is purpose-built for divers. Per Garmin’s specifications, the Mk3i and Mk3 support single-gas, multi-gas, gauge, apnea, apnea hunt, and closed-circuit rebreather (CCR) modes — a far broader range than app-based competitors. The Mk3i adds SubWave sonar for tank-pressure air integration and diver-to-diver messaging when paired with a T-series transceiver. The Descent G1 is the budget entry: it keeps nitrox multi-gas and apnea modes in a lighter, long-battery rugged body without the AMOLED screen or air integration.
Suunto Ocean
Suunto’s dive pedigree shows in the Ocean, which combines its Fused RGBM 2 decompression model and Tank POD air integration with fitness and training features. It sits between the Apple and Garmin experiences — stronger as a dedicated dive computer than the Ultra 2, more sport-and-outdoor focused than a pure smartwatch.
Scuba vs. freediving: what to prioritize
The two disciplines stress a watch differently, so buy for the dive you actually do most.
- Reliable NDL and decompression tracking
- Ascent-rate and safety-stop alerts
- Multi-gas/nitrox and optional air integration
- Fast, responsive depth alarms
- Clear surface-interval and recovery timing
- Lightweight, low-drag fit
Freedivers benefit from customizable depth and time alarms and quick sampling, while scuba divers lean on conservative algorithms, gas planning, and clear ascent guidance. Most models here do both, but Garmin and Suunto give freedivers finer control, whereas the Ultra 2’s Oceanic+ covers the essentials cleanly. If pulse-oxygen data matters to you between dives, read our explainer on SpO2 accuracy on smartwatches — and remember these readings are wellness features, not dive-safety instruments.
Who should buy which
- Choose the Apple Watch Ultra 2 if you’re an iPhone user who wants one everyday smartwatch that also handles recreational scuba to 40m and casual freediving.
- Choose a Garmin Descent Mk3i/Mk3 if you dive frequently, want multi-gas or rebreather support, air integration, or the longest battery for multi-day trips.
- Choose the Garmin Descent G1 or Suunto Ocean if you want a dedicated, capable dive computer at a lower price than the flagships.
Frequently asked questions
Can a regular waterproof smartwatch be used for scuba diving?
No. A high water-resistance rating (like WR100 or 10 ATM) only means the watch tolerates pressure and moisture — it does not provide depth tracking or decompression data. For diving you need an EN13319-certified device running a real dive-computer app.
What does EN13319 mean?
EN13319 is a European standard for depth-measuring diving accessories. It validates the depth sensor and pressure performance a dive watch relies on. Manufacturers list it in the specs of dive-capable models like the Apple Watch Ultra 2, Garmin Descent, and Suunto Ocean.
Do I have to pay a subscription to dive with the Apple Watch Ultra 2?
The built-in Depth app is free and shows depth, time, and temperature. Full scuba and freediving functionality comes from the third-party Oceanic+ app, which offers limited free use plus subscription tiers for dive planning and unlimited logging. Check current Oceanic+ pricing before you rely on it.
How long does battery last on a dive watch?
It varies widely: dedicated Garmin and Suunto units are built for multi-day battery in dive mode, while the Apple Watch Ultra 2 typically needs charging more often. Our battery-life comparison breaks down real-world endurance across brands.