When did The Summer I Turned Pretty season 3 finale, “At Last,” premiere?

The Summer I Turned Pretty season 3 finale, “At Last,” premiered on September 17, 2025.

“At Last” is the eleventh episode of the third season and the final episode of the television series. It follows Belly’s life in Paris and Conrad’s visit on his way to a conference in Brussels. The episode resolves the central romantic storyline while also showing developments for Jeremiah, Steven, and Taylor.

The finale came exactly nine weeks after the season’s July 16 premiere. Because the first two episodes were released together, the season used a mixed schedule: a two-episode opening followed by nine weekly episodes.

The date also matters in the franchise’s release history. On the same day the television series concluded, Amazon announced a feature-length continuation intended to further develop Belly’s story.