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Where to watch Summer Wars (2009)
Summer Wars is streaming on Filmelier Plus Amazon Channel in 5 countries, Prime Video in 4 countries and Max in 3 countries, plus 10 more services. In the US, you can watch it on Max. It isn't on a subscription service in the UK right now.
Summer Wars
Teenage math whiz Kenji Koiso agrees to take a summer job at the Nagano hometown of his crush, Natsuki. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of their matriarch. His job: pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with Earth.
Also available regionally
Filmelier Plus Amazon Channel
Aniverse Amazon Channel
RTL+
Animebox Channel Amazon Channel
U-NEXT
wavve
Watcha
TVING
Okko
Quick answers
Is Summer Wars on Netflix?
Yes, Summer Wars is on Netflix in 1 country, including Japan. It isn't on Netflix in the US.
Is Summer Wars on Prime Video?
Yes, Summer Wars is on Prime Video in 4 countries, including Italy, Japan and San Marino. It isn't on Prime Video in the US.
Is Summer Wars on Disney+?
No. Summer Wars isn't on Disney+ in any country right now.
Is Summer Wars on Max?
Yes, Summer Wars is on Max in 3 countries, including the US, Austria and Germany.
Where can I watch Summer Wars in the US?
In the US, Summer Wars is streaming on Max.
Where can I watch Summer Wars in the UK?
Summer Wars isn't on a subscription streaming service in the UK right now. A VPN lets you watch it from a country where it is streaming.
Where can I watch Summer Wars in Canada?
Summer Wars isn't on a subscription streaming service in Canada right now. A VPN lets you watch it from a country where it is streaming.
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Last updated October 7, 2026.