Grand Blue Season 3 Anime Details and Episodes The third season of Grand Blue. Series info Watch free DetailsFormatTvStatusUpcomingSeasonSummer 2026StudiosZero-G, Saber WorksSourceMangaCountryJapan GenresComedySlice of LifeSports TagsForeign RelatedGrand Blue Season 2 (Prequel)Grand Blue (Source) CharactersChisa KotegawaIori KitaharaKouhei ImamuraAina YoshiwaraAzusa Hamaoka (Supporting)