It safe to swim in the Adriatic Sea without taking off Apple Watch Ultra?

Is it safe to swim in the Adriatic Sea (Montenegro coast) (Water salinity ranges from 33 to 38 parts per thousand) without taking off my Apple Watch Ultra? Are the watches designed for swimming in water with such salinity? Could they get damaged? I would appreciate your answer, thank you!

Apple Watch Ultra, watchOS 9

Posted on Apr 9, 2023 6:34 PM

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Question marked as Top-ranking reply

Posted on Apr 9, 2023 6:59 PM

Your Apple Watch is water resistant, but not waterproof. Apple Watch Ultra has a water-resistance rating of 100 meters under ISO standard 22810:2010 and is EN13319-compliant.


If you have Apple Watch Ultra, you can wear it during recreational scuba diving up to 130 feet (40 meters) and other activities like swimming, showering, and water skiing.*


Water resistance isn't a permanent condition and can diminish over time. Apple Watch can't be rechecked or resealed for water resistance.


if you have Apple Watch Ultra, you can have it turn on Water Lock automatically when it's submerged to a depth of 10cm or lower. When you finish, press and hold the Digital Crown to unlock the screen and clear any water from your Apple Watch. A series of tones plays to clear any water that remains in the speaker. For more info, see:

About Apple Watch water resistance - Apple Support


Al,so see:

Use the Depth app on Apple Watch Ultra - Apple Support



5 replies
Question marked as Top-ranking reply

Apr 9, 2023 6:59 PM in response to MNEbrt

Your Apple Watch is water resistant, but not waterproof. Apple Watch Ultra has a water-resistance rating of 100 meters under ISO standard 22810:2010 and is EN13319-compliant.


If you have Apple Watch Ultra, you can wear it during recreational scuba diving up to 130 feet (40 meters) and other activities like swimming, showering, and water skiing.*


Water resistance isn't a permanent condition and can diminish over time. Apple Watch can't be rechecked or resealed for water resistance.


if you have Apple Watch Ultra, you can have it turn on Water Lock automatically when it's submerged to a depth of 10cm or lower. When you finish, press and hold the Digital Crown to unlock the screen and clear any water from your Apple Watch. A series of tones plays to clear any water that remains in the speaker. For more info, see:

About Apple Watch water resistance - Apple Support


Al,so see:

Use the Depth app on Apple Watch Ultra - Apple Support



Apr 9, 2023 7:05 PM in response to MNEbrt

Can it? Probably. Would I do it personally in highly saline water? No. Salt water is corrosive enough. Higher level salinity is more so. Apple Watch Ultra is certainly designed to operate in situations regular Apple Watches are not. But like javaliga suggests, no Apple Watch is truly rated as waterproof and if you swim with in high salinity water and it suffers from the experience, it will not be covered under warranty. To me, that's an expensive risk I wouldn't personally take.

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It safe to swim in the Adriatic Sea without taking off Apple Watch Ultra?

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