As of today, Monday, October 23, 2023, the latest Apple Watch update is watchOS 9.6.2. This update provides important security fixes and is recommended for all users. It was released on September 26, 2023, and includes improvements and bug fixes for the Apple Watch.

Its worth noting that the search results also include information about previous updates, such as watchOS 10 and watchOS 8, which were released in previous years. However, the latest update as of today is watchOS 9.6.2.