Apple has announced that watchOS 27 will be compatible with several models of the Apple Watch, specifically the Apple Watch Series 9, Series 10, Series 11, Apple Watch Ultra 2, Ultra 3, and Apple Watch SE 3. This new operating system requires users to have an iPhone 11 or later, or an iPhone SE (2nd generation or later) running iOS 27. Models that will not support watchOS 27 include the Apple Watch Series 8, Apple Watch Ultra 1, and earlier versions of the SE. Notably, features utilizing Apple Intelligence will require either the Series 9, Ultra 2, or SE 3, paired with a compatible iPhone. Apple has confirmed that watchOS 27 will be released this fall as a free update, with the first developer beta already available. More beta releases are expected leading up to the public launch, allowing developers to prepare for the new features. Users are encouraged to stay updated through various platforms for the latest information on watchOS.