26.08
wed
wed
Day
90°F
N 3 mph
Precip.
4%
4%
Night
82°F
NW 6 mph
Precip.
9%
9%
27.08
thu
thu
Day
82°F
NE 6 mph
Precip.
63%
63%
Night
82°F
N 4 mph
Precip.
8%
8%
28.08
fri
fri
Day
86°F
N 7 mph
Precip.
6%
6%
Night
82°F
S 2 mph
Precip.
27%
27%
29.08
sat
sat
Day
84°F
NE 7 mph
Precip.
16%
16%
Night
81°F
N 6 mph
Precip.
11%
11%
30.08
sun
sun
Day
84°F
E 8 mph
Precip.
19%
19%
Night
81°F
SW 6 mph
Precip.
24%
24%
31.08
mon
mon
Day
86°F
E 9 mph
Precip.
6%
6%
Night
82°F
W 8 mph
Precip.
17%
17%
01.09
tue
tue
Day
77°F
S 9 mph
Precip.
95%
95%
Night
79°F
S 7 mph
Precip.
10%
10%
sea water
temperature
temperature
| Nagasaki |
monthly
weather
weather
| Nagasaki |
current
weather
weather
| Nagasaki |
14 days
forecast
forecast
| Nagasaki |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 84.7°F. The highest and lowest sea temperatures during the month were 86.4°F and 83.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 83.9°F. The highest and lowest sea temperatures during the month were 85.3°F and 81.9°F.
Air temperature in Nagasaki, °F
Precipitation total in Nagasaki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Nagasaki
Nagasaki on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Nagasaki
Local time: 17:58
August 26, wednesday
1800
88°F
N
2 mph
2 mph
2100
84°F
NW
3 mph
3 mph
August 27, thursday
0000
82°F
NW
6 mph
6 mph
0300
81°F
SW
4 mph
4 mph
0600
81°F
W
4 mph
4 mph
0900
82°F
NE
1 mph
1 mph
1200
82°F
NE
6 mph
6 mph
1500
84°F
E
6 mph
6 mph
