The next episode of "The Summer I Turned Pretty," which is Season 3, Episode 9, will be released on Wednesday, September 3, 2025, at 12:00 a.m. PT (3:00 a.m. ET) on Prime Video. The episodes are released weekly on Wednesdays, and Season 3 has a total of 11 episodes with the finale scheduled for September 17, 2025.