https://www.cnet.com/news/watchos-5-comes-to-all-apple-watches-september-17/ > Even if you don't get the Apple Watch Series 4, your current Apple Watch will still feel new. > That's because Apple is releasing its latest Apple Watch software update, WatchOS 5, on Sept. 17. Apple revealed the launch date for WatchOS 5 at its event on Sept. 12.