Swimming in Japan in march 2025 Sea temperature by city in march

In march in Japan swimming conditions vary by city. Details below:

As for Okinawa, Naha, Aguni-jima, Ishigaki-jima, Itoman, Miyagi Island and Yonaguni-jima, swimming is pleasant in march. The sea water is 70°F on average (min: 68°F/max: 74°F) so you can easily spend time in the water.

Swimming in march in Kochi, Kagoshima (Kyushu), Nago, Higashi, Iheya-jima, Izenajima, Kumano Kodo, Tanega-shima, Tosashimizu, Yakushima, Yoron-jima, Miyazaki, Nichinan, Nobeoka, Saiki, Shibushi Bay, Tateyama and Uwajima is possible but the sea is generally cool. So though the sea temperature may sometimes reach 65°F, it can also go as low as 60°F. Note that the average is 63°F.

Swimming in march in Hakone, Nagasaki, Takamatsu, Tokushima, Goto islands, Ise, Izu, Kamakura, Muroto, Yokohama, Fuji, Hamamatsu, Kimitsu, Minamata, Niihama, Shingu, Shizuoka and Wakayama is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 61°F (min: 57°F/max: 64°F).

Forget about swimming in Tokyo, Fukuoka, Hiroshima, Nagoya, Osaka, Sapporo (Hokkaido), Abashiri, Akita, Aomori, Hakodate, Izumo, Kanazawa, Kobe, Okayama, Sendai (Honshu), Kitakyushu, Kure, Miyajima, Monbetsu, Niigata, Sado island, Shiretoko National Park, Tottori, Wajima, Asahi, Beppu/Ōita, Chiba, Hachinohe, Hamada, Hikari, Hitachi-Naka, Ishinomaki, Iwaki, Joetsu, Kamaishi, Karatsu, Kurayoshi, Kushiro, Maizuru, Masuda, Matsuyama, Miyako, Muroran, Mutsu, Nagaoka, Nanao, Nemuro, Noshiro, Otaru, Sakata, Sasebo, Tamano, Tomakomai, Toyama, Ube and Wakkanai in march! The water temperature is freezing, reaching as low as 56°F (and only 60°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!