Why can’t Apple Watch 10 show water temp to higher accuracy?

In Vitals my Apple Watch 10 displays wrist temperature anomalies to two decimal places (eg +0.14°), yet all water temperature recordings are rounded to the nearest degree (eg 16°). Why? Can we please have at least one decimal place for water temperature? 🙏

Posted on Jul 25, 2025 06:51 PM

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7 replies

Jul 26, 2025 02:26 AM in response to remaly167

Your body temperature will also change in the water, and the depth will also play a part in the temperature readings.

So the shown water temperature is an average of all the readings.


If you use the Feedback link, you can tell Apple directly about your wishes for future watchOS updates.

This is the only way to reach them, as Apple does not follow theses user to user communities.

Feedback - Apple Watch - Apple

Jul 26, 2025 07:25 PM in response to Matti Haveri

Thanks. I think you’re right on both counts, but it still doesn’t explain why there is this difference in display accuracy. I don’t imagine most women tracking period/ovulation will need to know temperature variation to two decimal places, but many open water swimmers and divers would be keenly interested in having water temperature displayed with a little more precision.

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Why can’t Apple Watch 10 show water temp to higher accuracy?

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