Grand Blue Season 3 is set to premiere on July 6, 2026, with the story moving to Palau for the first time.
The third season of the Grand Blue Dreaming anime will premiere on July 6, 2026, on Tokyo MX and BS11, with additional broadcasts on MBS from July 7 and AT-X from July 9. The season is set in Palau, marking the first time the story moves outside Japan. The synopsis for Episode 1, titled "Unfinished Business," confirms the third-year PaB members plan a summer festival, a premise that sets the tone for the new episodes.
Returning director Shinji Takamatsu is handling direction, script, and sound direction at studios ZERO-G and Liber. The opening theme song "Natsuko" is performed by FUNKY MONKEY BΛBY'S, and the ending theme song "Hadaka no Mermaid" is performed by MAMESHiBA NO TAiGUN, produced by comedian and actor Kuro-chan. New cast members include M.A.O as Karina, Sayaka Ōhara as Sayaka Kotegawa, Asami Seto as Chief, and Aya Suzaki as Maki.
The second season concluded in September 2025, and the third season was announced shortly after its finale. The manga by Kenji Inoue and Kimitake Yoshioka began serialization in Kodansha's Good! Afternoon magazine in April 2014 and has 26 volumes as of April 2026. The series also earned a spot on the 2026 list of 88 anime holy lands for its Ito City setting.
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ASCII.jp's 2026 Summer Anime Special Part 7 highlights five titles: Grand Blue Season 3, The Cat and the Dragon, The Strongest Dregs Prince's Secret Imperial Succession Struggle, The Case of the Transfer Student's Pure and Lovely Beautiful Girl Being a Childhood Friend I Used to Play with Thinking She Was a Boy, and X-Men '97. Grand Blue Season 3 premieres July 6.
The third season of the anime adaptation of Kenji Inoue and Kimitake Yoshioka's diving comedy manga will begin airing on TOKYO MX, BS11, MBS and other stations from July 6, 2026. Streaming on U-NEXT, Anime Hōdai, Anime Times, and Lemino starts July 7. The season takes Iori and the cast to Palau. Episode 1 synopsis and preview cuts have been released.
The synopsis and scene cuts for Episode 1 of Grand Blue Season 3 have been released. The episode, titled "Unfinished Business," airs July 6. The third-year PaB members plan a summer festival to do what they left unfinished, but it is bound not to end peacefully.
The third season of the Grand Blue Dreaming anime will premiere on July 6 on Tokyo MX and BS11, with additional broadcasts on MBS from July 7 and AT-X from July 9. The main promotional video, released on June 11, previews the opening theme song "Natsuko" by FUNKY MONKEY BΛBY'S and the ending theme song "Hadaka no Mermaid" by MAMESHiBA NO TAiGUN, which was produced by comedian and actor Kuro-chan. The season is set in Palau, marking the first time the story moves outside Japan. Returning director Shinji Takamatsu is handling direction, script, and sound direction at studios ZERO-G and Liber. Previously announced new cast members include M.A.O as Karina, Sayaka Ōhara as Sayaka Kotegawa, Asami Seto as Chief, and Aya Suzaki as Maki. The second season concluded in September 2025, and the third season was announced shortly after its finale.
The official website for the Grand Blue Dreaming anime revealed a key visual and the opening theme song artist for the third season on May 24, a date recognized as "Scuba Diving Day" in Japan due to a wordplay on "Go to Sea." The band FUNKY MONKEY BΛBY'S will perform the opening theme song titled "Natsuko." The season is set to premiere in July on Tokyo MX, BS11, MBS, and AT-X channels. This season will take the cast to Palau, marking the first time the setting has been outside Japan. New cast members include Sayaka Ohara as Sayaka Kotegawa, Asami Seto as Chief, and Aya Suzaki as Maki. The second season ended in September 2025, and the third season was announced shortly after its finale. The anime is produced by studios Zero-G and Saber Works, with Shinji Takamatsu returning as director, scriptwriter, and sound director. The manga by Kenji Inoue and Kimitake Yoshioka began serialization in Kodansha's Good! Afternoon magazine in April 2014 and has 26 volumes as of April 2026.
The summer anime guide from ASCII.jp confirms Grand Blue Season 3 will air in July 2026, moving the college comedy to Palau. The teaser PV shows the usual Izu University crew causing trouble before the overseas trip. Director Shinji Takamatsu returns. The series also earned a spot on the 2026 list of 88 anime holy lands for its Ito City setting.