watchOS 27

watchOS 27 began rolling out on September 14, 2026. Update documentation lists Series 9 and later, Ultra 2 and later and SE 3, requiring iPhone 11 or later or second-generation SE or later with iOS 27. OS and feature compatibility remain separate, without giving every model the new hardware's capabilities.

Family

watchOS

Version

27

Platform

Apple Watch Series 9+ / Ultra 2+ / SE 3

Apple · Update your Apple Watch · Apple · Security release register · Apple · Platform release · 2026-09-14

Siri AI was a rolling beta, initially in English; 27.2 added French, Japanese, Korean, Portuguese and Spanish on October 26. It required a paired Apple Intelligence-compatible iPhone and was unavailable on watchOS in the EU and mainland China when sources were checked. It was also unavailable under age 13 and could have usage limits. Spanish did not mean availability in Spain.

Apple · watchOS 27 notes · Apple · watchOS 27 user guide · Apple · Platform release · 2026-09-14 · Apple · Siri AI languages · 2026-10-26

Workout Buddy added English and Spanish motivation and could work without the iPhone nearby over Wi-Fi or cellular. Find My combined people, devices and items; a dynamic grid highlighted frequent and recent apps and a tap selected widgets. Readiness and new daytime Vitals metrics were documented for Series 12 and Ultra 4, not every watch running 27.

Apple · watchOS 27 notes · Apple · watchOS 27 user guide

The table retains two 27.0.1 dates: September 23 for Series 12 and Ultra 4, and September 28 with Apple's broader register label. Notes fixed unexpected restarts. 27.2 added more context and excluded-app controls for Siri AI; no 27.1 is invented to fill the gap. Apple's described capabilities are not presented as an independent accuracy or performance test.

Apple · watchOS 27 notes · Apple · Security release register