The Japan resorts with the warmest sea water temperature in May are Okinawa, Tokyo and Nagasaki.
Below you can see a list of all popular Japan resorts and information about sea water temperature in May for the last two years.
| Resort Name | May 2023 | May 2022 | May 2021 |
|---|---|---|---|
| Okinawa | 77.8°F | 79.0°F | 80.3°F |
| Tokyo | 68.7°F | 68.4°F | 67.8°F |
| Nagasaki | 68.3°F | 69.9°F | 68.9°F |
| Yokohama | 67.8°F | 67.6°F | 67.7°F |
| Kamakura | 67.5°F | 67.8°F | 67.3°F |
| Atami | 67.4°F | 68.4°F | 67.0°F |
| Hakone | 67.2°F | 68.3°F | 66.7°F |
| Fukuoka | 67.1°F | 68.4°F | 67.4°F |
| Osaka | 66.9°F | 67.4°F | 66.0°F |
| Nagoya | 66.9°F | 68.5°F | 67.7°F |
| Kobe | 66.6°F | 65.9°F | 65.3°F |
| Nara | 66.6°F | 67.5°F | 65.8°F |
| Kyoto | 65.8°F | 67.9°F | 65.0°F |
| Hiroshima | 64.5°F | 65.3°F | 65.2°F |
| Sapporo | 52.4°F | 51.8°F | 49.7°F |
| Noboribetsu | 47.3°F | 47.1°F | 44.8°F |
Please see following sea water temperature averages charts for the warmest Japan resorts in May.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
