Apple just announced during their iPhone event that watchOS 5 will be available to the public on September 17. Apple has been running a developer beta all summer, with features such as Walkie-Talkie and a full-fledged first-party Podcasts app with support for both downloading and streaming podcasts onto the Watch, all without the need of your iPhone.
Users wanting to update from watchOS 4 can simply do so from Watch app > General > Software Update on your iPhone. It’s unclear at this time if beta users will see an update or if the latest beta will be the same build as the public release.
Keep your eyes locked at 9to5Mac for more details coming out of Apple’s event, including information regarding the just announced Apple Watch Series 4.