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

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

As for Okinawa, Nago, Naha, Aguni-jima, Higashi, Iheya-jima, Ishigaki-jima, Itoman, Izenajima, Miyagi Island, Tanega-shima, Yakushima, Yonaguni-jima and Yoron-jima, swimming is pleasant in april. The sea water is 73°F on average (min: 69°F/max: 76°F) so you can easily spend time in the water.

Swimming in april in Kochi, Hakone, Kagoshima (Kyushu), Tokushima, Ise, Kamakura, Kumano Kodo, Muroto, Tosashimizu, Yokohama, Asahi, Kimitsu, Minamata, Miyazaki, Nichinan, Niihama, Nobeoka, Saiki, Shibushi Bay, Shizuoka, Tateyama, Uwajima and Wakayama is possible but the sea is generally cool. So though the sea temperature may sometimes reach 68°F, it can also go as low as 62°F. Note that the average is 65°F.

Swimming in april in Tokyo, Fukuoka, Nagoya, Osaka, Izumo, Kobe, Nagasaki, Okayama, Takamatsu, Goto islands, Izu, Kitakyushu, Beppu/Ōita, Chiba, Fuji, Hamamatsu, Karatsu, Matsuyama, Sasebo, Shingu and Tamano 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: 65°F).

Forget about swimming in Hiroshima, Sapporo (Hokkaido), Abashiri, Akita, Aomori, Hakodate, Kanazawa, Sendai (Honshu), Kure, Miyajima, Monbetsu, Niigata, Sado island, Shiretoko National Park, Tottori, Wajima, Hachinohe, Hamada, Hikari, Hitachi-Naka, Ishinomaki, Iwaki, Joetsu, Kamaishi, Kurayoshi, Kushiro, Maizuru, Masuda, Miyako, Muroran, Mutsu, Nagaoka, Nanao, Nemuro, Noshiro, Otaru, Sakata, Tomakomai, Toyama, Ube and Wakkanai in april! The water temperature is freezing, reaching as low as 55°F (and only 62°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!