Apple Watch S3 Water rating

Welcome to the Apple Support Communities!

I understand you would like to swim with your Apple Watch Series 3. With this watch, you certainly can! Here are a few resources that explain water resistance and specific workouts for swimming.
About Apple Watch water resistance​

Apple Watch Series 2 and Apple Watch Series 3 have a water resistance rating of 50 meters under ISO standard 22810:2010.
Classic Buckle, Leather Loop, Modern Buckle, Milanese, and Link Bracelet Bands aren't water resistant.
Apple Watch Series 2 and Apple Watch Series 3

When you start a swimming workout, your Apple Watch automatically locks the screen with Water Lock to avoid accidental taps. When you're done, turn the Digital Crown to unlock the screen and clear any water from your Apple Watch. You hear sounds and may feel some water on your wrist.

To manually clear water from Apple Watch, swipe up on the bottom of the watch face to open Control Center, tap Water Lock, then turn the Digital Crown to unlock the screen and clear water from the speaker.

About workout types​

Swimming workouts

With Apple Watch Series 2 or later, you can choose Pool Swim or Open Water Swim. When the workout starts, the screen automatically locks to prevent accidental taps from water droplets.

Here's how to end your workout and unlock the screen:

1. Press the Digital Crown and the side button at the same time to pause your workout.
2. Dry your screen. If the screen's wet, the water might cause accidental taps.
3. Turn the Digital Crown to unlock the screen and clear any water from your Apple Watch. Your watch makes a sound, and you might feel water on your wrist.
4. Swipe right and tap End.

Here's how your Apple Watch measures each workout:

• Pool Swim: When you start a workout, be sure to accurately set the pool length to help your Apple Watch measure laps and distance. GPS isn't used during a Pool Swim, and water might prevent a heart-rate measurement, but calories, laps, and distance will still be tracked using the built-in accelerometer.
• Open Water Swim: GPS will only provide distance when you do a freestyle stroke. Water might prevent a heart-rate measurement, but calories will still be tracked using the built-in accelerometer.

Cellular coverage on Apple Watch Series 3 (GPS + Cellular) might be impacted during Pool Swim and Open Water Swim workouts.

Enjoy your day!