Shichirigahama Beach (七里ヶ浜) 七里ヶ浜
The water is 24 degrees in summer and 12 in winter; the waves here are for beginners.
It looks out towards Enoshima Island, and Mount Fuji on clear days. It is the same coast that serves as the setting for Bunny Girl Senpai, produced by the same studio.
Kanagawa
Shichirigahama, Inamuragasaki
The Fragrant Flower Blooms with Dignity
The beach of the fireworks and the confession, in episode 12: the climax of the series. The anime draws the spot on the beach about fifty metres further east than the manga does.