Current Sea Water Temperature:
+65.6°F
| Maximum Sea Water Temperature in April: | 67.2°F |
| Minimum Sea Water Temperature in April: | 58.6°F |
| Average water temperature in April: | 63.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| April 04 | 65.6°F | March 30 | 61.6°F |
| April 03 | 65.8°F | March 29 | 62.2°F |
| April 02 | 65.8°F | March 28 | 63.2°F |
| April 01 | 63.4°F | March 27 | 63.4°F |
| March 31 | 63.2°F | March 26 | 64.2°F |
When is the Warmest Sea for Nagasaki?
According to our data for the last three years for Nagasaki the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Nagasaki was 88.7°F. The maximum and minimum values were 86.6°F and 90.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Nagasaki was 87.7°F. The maximum and minimum values were 85.4°F and 89.2°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Nagasaki was 87.1°F. The maximum and minimum values were 84.2°F and 89.0°F respectively.
Japan Resorts:
NAME
F°
| Atami |  |
+62 |
| Fukuoka |  |
+54 |
| Hakone | |
+60 |
| Hiroshima |  |
+52 |
| Kamakura | |
+64 |
| Kobe | |
+60 |
| Kyoto | |
+60 |
| Nagasaki | |
+58 |
| Nagoya |  |
+62 |
| Nara | |
+60 |
| Okinawa | |
+66 |
| Osaka | |
+62 |
| Sapporo | |
+44 |
| Tokyo | |
+62 |
| Yokohama | |
+64 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Nagasaki
Local time: 00:31
05 apr, sunday
| 0300 |  |
58°F | SE 5 mph |
| 0600 | |
56°F | E 7 mph |
| 0900 |  |
60°F | E 9 mph |
| 1200 | |
62°F | NE 8 mph |
| 1500 |  |
62°F | NE 11 mph |
| 1800 | |
60°F | NE 7 mph |
| 2100 |  |
58°F | NE 6 mph |
06 apr, monday
| 0000 |  |
58°F | N 5 mph |