Do you dream of diving into the ocean, swimming at sea or surfing without ever leaving your connected wrist?

Stop looking for the rare pearl: here is the ultimate classification of sea water connected watches, thoughts for demanding swimmers and adventurers who refuse to choose between technology and freedom.

Safety, performance and freedom in salt water

The user wants a connected watch capable of resisting seawater, reliable for sporting follow -up, and adapted to swimming or diving. He is looking for a comparative guide, expert opinions, clear answers on the real resistance of seawater watches, and advice to avoid the traps of the false marketing promises.

Can waterproof watches go into the sea?

Yes, but not all! A waterproof seawater connected watch is not only “water resistant”: it must withstand pressure, salt, corrosion and thermal shocks. Favor the IP68, 5atm or more certified models, and above all, check the explicit mention “sea water” or “sea & beach” in the characteristics. Please note: even a watertight watch to 50 m is not necessarily made for deep diving or impact sports (kite, jet ski ...).

What do you call a watch that can go in the water?

We talk about waterproof watch or “water resistant”. But for the sea, look for the “waterproof seawater”, “diving watch” or “smartwatch waterproof sea” mentions to avoid any unpleasant surprises. ATM certifications (5atm = 50 m, 10atm = 100 m…) are your compass: the higher the figure, the more the pressure and prolonged immersions.

Top 5 WalDs Watches Seawater in 2025

1. Garmin Descent MK3

See the Garmin Descent MK3 and the opinions on Amazon

The absolute reference for scuba diving and swimming at sea. 200 m waterproofing, advanced diving methods, subwave communication between divers, autonomy of 10 days, ultra-resistant box.

It is the new generation diving computer, without hidden subscription, designed for pros and enthusiasts.

2. Garmin Swim 2

See the Garmin Swim 2 and the opinions on Amazon

The watch for demanding swimmers: precise GPS, follow -up of the swolf, heart rate under water, pool & free water modes, 50 m waterproofing.

Simple, effective, reliable, she is the star of pools and sessions at sea.

3. Apple Watch Ultra 2

See Apple Watch Ultra 2 and Amazon reviews

Ultimate versatility: 100 m waterproofing, ultra -light screen, health follow -up, GPS, swimming detection, Oceanic+ compatible for leisure diving.

Ideal for Apple Addicts athletes who want everything right away.

4. Samsung Galaxy Watch 5 Pro

See the Galaxy Watch 5 Pro and Amazon reviews

Robust, elegant, waterproof 50 m, advanced swimming modes, solid autonomy, intuitive interface.

Perfect for Android swimmers who want health and sport without compromise.

5. Kuulaa-tech sea water

See the Kuulaa-Tech and opinions on Amazon

The clever choice: IP68 certification, military resistance MIL-STD810H, GORILLA glass, 70 sport modes, full health follow-up, Canon price.

For the backpackers who want strong without breaking the bank.

What Garmin watch for diving?

The range Garmin Descent (G1 Solar, MK3, MK3I) is cut for scuba diving: waterproofing up to 200 m, management of gas mixtures, GPS monitoring, compatibility with pressure probes, underwater communication ... It is the top for divers who want to control everything, even in depth.

Expert advice to swim at sea without risk

• Always rinse your watch in fresh water after each swim at sea To avoid corrosion of salt, even on “sea water” models.
• Avoid violent shocks (Diving, impact sports) If your watch is not certified for.
• Check the manufacturer's warranty : Some exclude damage linked to salt water.
• Favor silicone or titanium bracelets : leather and some plastics hate salt.
• Activate swimming or diving modeBefore entering the water to avoid false manipulations.

Questions

Can waterproof watches go into the sea?

Yes, if they are explicitly designed to resist salt water and have suitable certification (IP68, 5ATM minimum).

What Garmin watch for diving?

The Garmin Descent MK3 (or G1 Solar): it is the most complete diving watch on the market, waterproof to 200 m, with pro functions.

What do you call a watch that can go in the water?

A waterproof watch (“water resistant” or “waterproof seawater” for the sea).

Conclusion: Never swim without your sea water connected watch

To swim at sea is freedom. But freedom is worth a deserving: choose a seawater water -water connected watch really designed to face the salt, the pressure and the challenges of the ocean.

Trust Garmin, Apple, Samsung or Kuulaa-Tech to stay connected, analyze your performance and push your limits ... without ever fear for your watch.Do you want to go further?

Test, compare, share your experiences: the sea is waiting for you.

Expertise:Written by an enthusiast of water sports, connected watch tester, regular contributor to outdoor technologies and security in the marine environment.

My clear opinion:If you are looking for ultimate safety and performance: Garmin Descent MK3. For the best value for money: Garmin Swim 2 or Kuulaa-Tech. For versatility: Apple Watch Ultra 2.The sea does not wait. And you ?

Here is a complete guide on sports watches for swimming: