The release of the watchOS 2 update announced for today, simultaneously with the iOS 9 update, has been delayed by Apple due to a substantial bug. No word yet on when it will be released.
Apple Delays Release Of watchOS 2 Due To Bug

The release of the watchOS 2 update announced for today, simultaneously with the iOS 9 update, has been delayed by Apple due to a substantial bug. No word yet on when it will be released.