Will Apple Watch Series 5 (watchOS 10.6.1) pair with iPhone 15 Pro on iOS 18?

Select the appropriate watchOS from the dropdown menu in this guide --> Set up and pair your Apple Watch with iPhone – Apple Support (UK)

Hasnat1324 wrote:

I am using an Apple Watch Series 5 running watchOS 10.6.1, paired with my iPhone 15 Pro running iOS 17.7. My Apple Watch does not support upgrading to watchOS 11.

I’m considering upgrading my iPhone to iOS 18 but am unsure if my Apple Watch will still pair and function properly with the updated iPhone. Could someone confirm if watchOS 10.6.1 is compatible with iOS 18, or if this upgrade might cause any issues?

Your watch will still be paired to your iPhone and the upgrade to iOS 18 will not cause an issue.