The teaser offers up the first glimpse of Will, Simon, Jay and Neil's adventure down under.
Cast members Simon Bird, Joe Thomas, Blake Harrison and James Buckley are all returning for the follow-up, while TV series creators Damon Beesley and Iain Morris are writing and directing.
Emily Berrington, Freddie Stroma and David Field are new cast additions.
The Inbetweeners 2 will open in UK cinemas on August 8, soon after Marvel's Guardians of the Galaxy (August 1) and on the same day as Disney's Planes 2: Fire and Rescue.
Watch Simon Thomas discuss the sequel with Digital Spy: