The anime series Grand Blue has officially announced that a fourth season is in production. This news was revealed at the end of the 12th and final episode of Grand Blue Season 3. The announcement was also accompanied by the release of an announcement visual on the series' official website.
Grand Blue Season 3, produced by Zero-G and Saber Works, premiered on July 7. The first season of Grand Blue, produced by Zero-G, consisted of 12 episodes and aired in Summer 2018. A second season followed, airing in Summer 2025. Amazon Prime Video streamed the first season, while Crunchyroll simulcasted the second season.
Key points
- A fourth season of Grand Blue is in production.
- The announcement was made at the end of Grand Blue Season 3's final episode.
- An announcement visual was released on the official website.
- Grand Blue Season 3 premiered on July 7.
Source: MyAnimeList · News · Sep 21, 2026
