In March warmest sea in Japan is usually observed in the following locations: Okinawa, Nagasaki, Atami.
Table below shows the average sea water temperature for marine resorts of Japan in March for the last three years.
| Place name | March 2026 | March 2025 | March 2024 |
|---|---|---|---|
| Okinawa | 70.5°F | 70.8°F | 70.8°F |
| Nagasaki | 60.3°F | 57.9°F | 60.2°F |
| Atami | 60.0°F | 59.6°F | 61.0°F |
| Hakone | 59.4°F | 59.3°F | 60.9°F |
| Kamakura | 57.9°F | 58.7°F | 59.8°F |
| Fukuoka | 54.7°F | 53.4°F | 54.9°F |
| Yokohama | 54.5°F | 55.6°F | 54.3°F |
| Tokyo | 53.8°F | 54.6°F | 52.8°F |
| Hiroshima | 52.2°F | 53.0°F | 52.9°F |
| Nagoya | 50.7°F | 53.2°F | 54.5°F |
| Kobe | 50.1°F | 50.3°F | 51.1°F |
| Osaka | 49.8°F | 50.8°F | 51.1°F |
| Nara | 49.6°F | 50.3°F | 50.4°F |
| Kyoto | 48.9°F | 48.9°F | 48.3°F |
| Sapporo | 40.4°F | 40.8°F | 39.4°F |
| Noboribetsu | 37.3°F | 40.4°F | 36.2°F |
Charts below show average sea water temperature for Japan resorts with the warmest sea in March.
You can also check other months of the year to see sea temperature of Japan resorts at that time.
Places in Japan:
Name
°F
