Overview
- Apple released the watchOS 27 developer beta on June 9, 2026, with a public beta expected in July and a final worldwide release targeted for September alongside iOS 27.
- The company published a compatibility list that allows upgrades on Apple Watch SE 3, Series 9, Series 10, Series 11, Ultra 2 and Ultra 3 only.
- Apple Watch SE (2nd gen), Series 6, Series 7, Series 8 and the first‑generation Ultra are no longer eligible for watchOS 27, prompting strong user backlash online from owners of recently made devices.
- watchOS 27 adds AI-powered experiences, a more conversational Siri, an independent Workout Buddy that can run without a nearby iPhone, improved treadmill tracking, a redesigned app grid, and a unified Find My interface.
- Installing watchOS 27 requires an iPhone 11 or later or an iPhone SE (2nd gen) running iOS 27, and Apple has said some advanced Apple Intelligence features will be restricted to newer hardware such as Series 10 and above with additional AI health features possibly phased into later 27.x updates.