In February warmest sea in Japan is usually observed in the following locations: Okinawa, Nagasaki, Hakone.
Table below shows the average sea water temperature for marine resorts of Japan in February for the last three years.
| Place name | February 2026 | February 2025 | February 2024 |
|---|---|---|---|
| Okinawa | 69.9°F | 69.2°F | 71.9°F |
| Nagasaki | 60.1°F | 57.1°F | 60.7°F |
| Hakone | 59.3°F | 59.2°F | 60.4°F |
| Atami | 59.3°F | 59.0°F | 60.7°F |
| Kamakura | 59.1°F | 59.2°F | 60.1°F |
| Yokohama | 55.6°F | 55.4°F | 55.2°F |
| Tokyo | 54.8°F | 52.0°F | 53.4°F |
| Fukuoka | 54.4°F | 53.7°F | 55.4°F |
| Hiroshima | 52.8°F | 51.7°F | 53.8°F |
| Nagoya | 49.4°F | 51.8°F | 52.8°F |
| Kobe | 48.3°F | 48.5°F | 51.3°F |
| Kyoto | 48.2°F | 47.7°F | 49.6°F |
| Nara | 47.7°F | 48.0°F | 50.7°F |
| Osaka | 47.4°F | 47.8°F | 51.2°F |
| Sapporo | 41.1°F | 42.3°F | 39.7°F |
| Noboribetsu | 38.0°F | 40.9°F | 40.5°F |
Charts below show average sea water temperature for Japan resorts with the warmest sea in February.
You can also check other months of the year to see sea temperature of Japan resorts at that time.
Places in Japan:
Name
°F
