Two hours left until WWDC starts and Apple Beta website has went offline.
The website reads,
We’ll be back soon. We’re busy updating the Apple Beta Software Program website and will be back soon.
The developer beta of the newer versions of iOS, MacOS and WatchOS will be released today after the developer conference. The website is taken down most probably to upload the required instructions and files to install the newer versions of the operating systems.
Let us know in the comments if you are going to try the developer beta(s).