The website for the Apple Beta Program has gone down ahead of the WWDC 2016 keynote, due to start at 10 AM PT (in about 40 minutes). With Apple about to unveil iOS 10, macOS 10.12, watchOS 3 and new tvOS, the Beta Program site going down indicates that at least something new will be available for wider release today.
Try Amazon Prime 30-Day Free Trial
There’s a chance iOS 10 will be available for public betas today but it is slim given tradition; a developer beta for iOS 10 will almost certainly debut today. Apple usually releases a public beta for new iOS and OS X later in the cycle, around seed 3 about a month after the initial developer seeds.
Keep it locked to 9to5Mac for full coverage of all the announcements. A public beta for iOS 10 at the same time as the developer beta would be unprecedented.