It’s worth noting straight away that you can’t simply use the Apple Watch to measure your body temperature. Instead the watch calculates a baseline figure as it measures your sleep, and then keeps a track of how that baseline figure changes over time. As it’s not immediately obvious how to get to this data, this handy guide will break it down in a few simple steps.
What you’ll need:
An Apple Watch Series 8 (this will also work on the Apple Watch Ultra) with Sleep mode enabledAt least five days of sleep dataAn iPhone
