To remove water from your Apple Watch, turn the Digital Crown on and then swipe upwards. The blue dots will start to dance and sounds will be emitted.
You can then use the display as normal. Once you've done that, your Apple Watch will be completely dry. If you're wearing the Apple Watch while swimming, you'll probably notice that it is leaking some of the water from its speaker.
To fix this problem, you can simply turn the Digital Crown in the other direction.
These methods will dry out all the water or any other liquid from apple watch and you can continue your sports activity anytime.