We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies as per our policy which also explains how to change your preferences.

Best activity trackers and fitness watches

Top 5 waterproof fitness watches and activity trackers for swimming

By Hannah Walsh

Article 3 of 6

Dive into our pick of the best waterproof fitness trackers and watches for the pool, including models from Fitbit, Garmin and Samsung

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

Whether you want to improve your front crawl, backstroke, breaststroke or butterfly, an activity tracker could help. But not all activity trackers can be used in the water, and some will even get damaged if you wear them in the shower. Before diving in it's important to know the level of water resistance your tracker offers, to avoid damage to your device.

In the table below, we've rounded up the best of the activity trackers from our testing that can be used in a pool and that offer some form of swim tracking. Our picks are great out of the pool, too, with accurate activity tracking, easy-to-use apps and comfortable designs. 

If you're looking for more detailed swim metrics – such as stroke, pace or speed data – combined with other in-depth sports or fitness tracking, then check out our fitness watches for swimming.

Only logged-in members can view our recommendations in the table. If you’re not yet a member, you can get instant access with a Which? trial.

Best activity trackers and fitness watches for swimming


Detailed swim tracking makes this a great device for keen swimmers or triathletes.


A plethora of tracking options and plenty of detailed swim data – is this pricey fitness watch the perfect partner in the pool?


A feature-packed tracker that’s a pro at tracking your activity and swimming – is it the one for you?


An accurate and comfortable fitness tracker that tracks everyday activity well, and is water resistant to 50 metres.


Suitable for the pool and salt-water swimming, this tracker will display swim duration and calories burned.

Pricing, recommendations and test scores correct as of June 2018.

Not found the perfect product for you? Browse all of our fitness watch and activity tracker reviews.

Water ratings explained

Water ratings are a confusing topic, and rating codes may mean different things depending on the type of device they are referring to. In the tables below we look at the different ratings, and what each one means in terms of how you can use your fitness tracker around and in water.

There are two main ways to find out what level of water protection or resistance your fitness tracker has. The first thing to look for is the Ingress Protection (IP) rating. These are set by the International Electrotechnical Commission (IEC), and refer to the protection provided by the casing of an electrical device in fresh water. 

The first digit after the IP reflects the level of protection against solids, such as dust or grit. The second represents the protection against moisture. An IP code with an X in place of either number means the device hasn't been tested for that element. For example, a fitness tracker with a rating of IPX7 has been tested for moisture protection, but not dust.  

IP code Level of protection
0 No protection
1 - 3 Protection against light rain
4 - 6 Splashproof
7 Protected from immersion in water with a depth of up to 1 metre for up to 30 minutes
8 Protected from continuous immersion in water with a depth of more than 1 metre

The second is the water-pressure rating. These are standards set by the International Organisation for Standardisation (ISO). Pressure tests are measured in atmospheres (ATMs), and replicate the level of pressure at certain depths of water.

Water ratings Level of protection
1 ATM Resistant to pressure equivalent to a depth of 10 metres. Splashproof, but not shower or swim proof.
3 ATM Resistant to pressure equivalent to a depth of 30 metres. Splashproof and shower proof, and should be fine if accidentally submersed. Not designed for swimming.
5 ATM Resistant to pressure equivalent to a depth of 50 metres. Splashproof, shower proof, can be worn swimming and snorkelling in shallow water.
10 ATM Resistant to pressure equivalent to a depth of 100 metres. Splashproof, shower proof, swimming and snorkelling. Not designed for deep water diving or water sports.
20 ATM Resistant to pressure equivalent to a depth of 200 metres.  Splashproof, shower proof, swimming and snorkelling. Surface diving and watersports, but no deep-water diving.