| 8°C | Aikawa
Sea temperature in AikawaAverage water temperature: 16,6°C |
| | 6°C | Akita
Sea temperature in AkitaAverage water temperature: 15,2°C |
| | 21°C | Chichijima
Sea temperature in ChichijimaAverage water temperature: 25,3°C |
| | 12°C | Choshi
Sea temperature in ChoshiAverage water temperature: 17,9°C |
| | 16°C | Fukue
Sea temperature in FukueAverage water temperature: 21,9°C |
| | 19°C | Hachijojima
Sea temperature in HachijojimaAverage water temperature: 22,7°C |
| | 1°C | Hakodate
Sea temperature in HakodateAverage water temperature: 10,9°C |
| | 12°C | Irozaki
Sea temperature in IrozakiAverage water temperature: 15,8°C |
| | 24°C | Ishigakijima
Sea temperature in IshigakijimaAverage water temperature: 26,3°C |
| | 14°C | Izuhara
Sea temperature in IzuharaAverage water temperature: 20,5°C |
| | 10°C | Kanazawa
Sea temperature in KanazawaAverage water temperature: 17,8°C |
| | 22°C | Kumejima
Sea temperature in KumejimaAverage water temperature: 25,7°C |
| | 22°C | Minamidait.
Sea temperature in Minamidait.Average water temperature: 25,5°C |
| | 24°C | Minamitorish.
Sea temperature in Minamitorish.Average water temperature: 26,9°C |
| | 24°C | Miyakojima
Sea temperature in MiyakojimaAverage water temperature: 26,2°C |
| | 8°C | Murotomisaki
Sea temperature in MurotomisakiAverage water temperature: 17,7°C |
| | 17°C | Nagasaki
Sea temperature in NagasakiAverage water temperature: 22,3°C |
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| | | 22°C | Nago
Sea temperature in NagoAverage water temperature: 24,4°C |
| | 5°C | Nagoya
Sea temperature in NagoyaAverage water temperature: 14,5°C |
| | 23°C | Naha
Sea temperature in NahaAverage water temperature: 25,7°C |
| | 21°C | Naze
Sea temperature in NazeAverage water temperature: 25°C |
| | -1°C | Nemuro
Sea temperature in NemuroAverage water temperature: 7,2°C |
| | 22°C | Okinoerabu
Sea temperature in OkinoerabuAverage water temperature: 25,1°C |
| | 17°C | Osaka
Sea temperature in OsakaAverage water temperature: 22,3°C |
| | 15°C | Oshima
Sea temperature in OshimaAverage water temperature: 19,8°C |
| | 12°C | Saigo
Sea temperature in SaigoAverage water temperature: 18,9°C |
| | 0°C | Sapporo
Sea temperature in SapporoAverage water temperature: 10,8°C |
| | 0°C | Sendai
Sea temperature in SendaiAverage water temperature: 10,2°C |
| | 16°C | Shimizu
Sea temperature in ShimizuAverage water temperature: 21,8°C |
| | 3°C | Takamatsu
Sea temperature in TakamatsuAverage water temperature: 13,1°C |
| | 20°C | Tanegashima
Sea temperature in TanegashimaAverage water temperature: 24,2°C |
| | 6°C | Tokyo
Sea temperature in TokyoAverage water temperature: 14,2°C |
| | 20°C | Yakushima
Sea temperature in YakushimaAverage water temperature: 23°C |
| | 24°C | Yonagunijima
Sea temperature in YonagunijimaAverage water temperature: 24,6°C |
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