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“Waterproof” on a product page does not always mean you can swim with the watch. Ratings describe specific tests. This guide explains the common labels and what they mean for daily use.

This guide is based on product listings and general knowledge rather than our own testing. Features vary by model and year, so confirm the details on the product page. Smartwatch health readings are estimates and are not medical advice.

By the Reviewstook Editorial Team. Last updated: November 1, 2026.

IP Ratings

IP ratings, such as IP67 or IP68, describe protection against dust and water. The first number covers dust and the second covers water. They are tests for still water at a set depth and time, and they do not cover moving water well. IP67 and IP68 usually mean the watch can handle splashes and brief immersion.

ATM and Water Depth

ATM ratings, such as 3 ATM or 5 ATM, come from pressure tests. A 5 ATM rating is often described as suitable for swimming in shallow water. Higher ratings suit more water activity. The exact meaning depends on the maker’s guidance, so read it.

Showers, Hot Water and Soap

Hot water, steam and soaps can damage seals over time. Many makers advise against wearing the watch in a sauna or hot shower. Check the manual.

Salt Water and Pools

Rinse with fresh water after a swim and dry the watch. Chlorine and salt can damage straps and seals.

Care Tips

  • Keep the charging port dry before charging.
  • Do not press buttons underwater unless the maker says it is safe.
  • Replace worn straps and seals if the maker offers a service.
  • Water resistance can fade with age and impact.

Matching the Rating to the Activity

  • Handwashing and rain: IP67, IP68 or 3 ATM.
  • Swimming laps: 5 ATM or higher, if the maker states it is suitable.
  • Surfing and water sports: look for higher ratings and the maker’s statement.
  • Scuba diving: use a watch specifically made for diving.

What Voids Water Resistance

  • Dropping or hitting the watch hard.
  • Chemicals such as perfume, solvents or strong cleaners.
  • Hot tubs, saunas and steam.
  • Damaged seals or cracked glass.

Strap Materials in Water

Silicone and nylon dry quickly and suit pools. Leather and metal bands can be damaged by water or chlorine. Many watches let you swap bands in seconds.

Frequently Asked Questions

Can I swim with an IP68 watch?

Not necessarily. IP ratings do not cover swimming well; check the ATM rating and the maker’s guidance.

Is 5 ATM enough for swimming?

Often yes for shallow swimming, but follow the maker’s instructions.

Can I shower with my smartwatch?

Many can, but hot water and soap can wear seals.

Does water resistance last?

It can decline over time and with damage.

Is IPX7 the same as 1 ATM?

No. They are different tests; read the maker’s guidance.

Can I wear my watch in the ocean?

Rinse with fresh water afterward, and only if the rating supports it.

Bottom Line

Check the exact rating, follow the maker’s guidance, and rinse and dry the watch after water. Choose a 5 ATM or higher watch if you swim.