The finale of "The Summer I Turned Pretty" drops on September 17, 2025. It is the last episode of season 3 and the entire series. The episode releases at 3:00 a.m. Eastern Time (ET) and midnight Pacific Time (PT) on Prime Video. In other time zones, such as the UK, it releases at 8:00 a.m. BST, and in Australia at 5:00 p.m. AEST on the same day. This final episode marks the conclusion of Belly Conklin's story and the end of the show.