Measurements:
°C
°F
CURRENT WEATHER
05:31
Nagasaki
80°F
S 17 mph
Feels like: 86°F
Precip: 21%
World Resorts Japan Nagasaki Weather

7 Day Weather Forecast

09.09
wed
DAY
84°F
SW 21 mph
precip
7%
NIGHT
80°F
SW 17 mph
precip
17%
09.10
thu
DAY
74°F
SW 6 mph
precip
73%
NIGHT
76°F
SW 6 mph
precip
29%
09.11
fri
DAY
84°F
SE 3 mph
precip
29%
NIGHT
80°F
SW 5 mph
precip
28%
09.12
sat
DAY
84°F
N 1 mph
precip
24%
NIGHT
82°F
SW 3 mph
precip
10%
09.13
sun
DAY
84°F
NE 5 mph
precip
57%
NIGHT
80°F
SW 3 mph
precip
34%
09.14
mon
DAY
84°F
E 6 mph
precip
17%
NIGHT
82°F
W 2 mph
precip
24%
09.15
tue
DAY
82°F
NE 2 mph
precip
70%
NIGHT
78°F
SW 5 mph
precip
30%

Nagasaki Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Nagasaki was 28.9°F. The maximum and minimum values were 27.7°F and 29.6°F respectively.

Nagasaki on the Weather Map

Best Time to Visit Nagasaki
The most sunny months:
October 18 days
May 14 days
August 13 days
The most warm months:
August 91.6 °F
July 88.2 °F
September 86.6 °F
Warmest sea temperature:
August 86.5 °F
September 83.7 °F
July 82.3 °F
The most cold months:
January 50.4 °F
February 52.0 °F
December 54.1 °F
The most rainy months:
July 11 days
June 11 days
August 9 days
The most windy months:
January 11 mph
February 11 mph
December 11 mph
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