The third season of "The Summer I Turned Pretty" premiered on Prime Video on July 16, 2025. The season features a total of 11 episodes. Following the premiere of the first two episodes on July 16, new episodes are released weekly on Wednesdays at 3 a.m. ET (midnight PT) until the season finale on September 17, 2025. This season is the final chapter of the series and continues the story four years after Season 2, focusing on Belly as she navigates her relationships and upcoming adulthood.