Why Can't I see the beat on my Apple Watch 8 during swimming?

Good day to you raimo160, 

You might want to tighten your Apple Watch band for workouts, then loosen it when you’re done. In addition, the sensors will work only if you wear your Apple Watch on the top of your wrist. The following article has more information on how to get a good fit when you wear your Apple Watch and find out about potential skin sensitivities. Wearing your Apple Watch

It would also be helpful to know if this happens during other workout types or if you have an issue taking a heart rate reading at other times. Monitor your heart rate with Apple Watch 

You can check your heart rate any time using the Heart Rate app. Open the app, then wait for Apple Watch to measure your heart rate.

Thanks.

Hey raimo160,

We'd recommend reviewing this article as it provides information on swimming with Apple Watch: Swim with your Apple Watch - Apple Support

If that doesn't help, you may want to provide some additional information about the situation.

When you say that you can't see the beat during swimming, what do you mean by "the beat"? Are you referring to heart rate or something else?

Which model of iPhone and version of iOS is paired with your Apple Watch?

Thanks!