Measurements:
°C
°F
CURRENT WEATHER
14:26
Nagasaki
78°F
NE 13 mph
Feels like: 82°F
Precip: 71%
World Resorts Japan Nagasaki Weather

7 Day Weather Forecast

05.20
wed
DAY
80°F
N 5 mph
precip
76%
NIGHT
74°F
N 12 mph
precip
100%
05.21
thu
DAY
72°F
NE 14 mph
precip
100%
NIGHT
68°F
SE 4 mph
precip
84%
05.22
fri
DAY
76°F
SW 11 mph
precip
0%
NIGHT
66°F
SW 6 mph
precip
0%
05.23
sat
DAY
76°F
N 8 mph
precip
0%
NIGHT
68°F
SW 8 mph
precip
100%
05.24
sun
DAY
80°F
S 7 mph
precip
0%
NIGHT
68°F
SW 4 mph
precip
0%
05.25
mon
DAY
78°F
NE 4 mph
precip
0%
NIGHT
70°F
N 3 mph
precip
0%
05.26
tue
DAY
78°F
N 6 mph
precip
0%
NIGHT
74°F
NW 6 mph
precip
0%

Nagasaki Sea Water Temperature in May, °F

Select Year: 2026 2025 2024

The average sea surface temperature in May 2026 for Nagasaki was 19.5°F. The maximum and minimum values were 18.0°F and 22.0°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 91.8 °F
July 88.3 °F
September 86.6 °F
Warmest sea temperature:
August 86.4 °F
September 83.7 °F
July 82.2 °F
The most cold months:
January 50.4 °F
February 52.0 °F
December 54.1 °F
The most rainy months:
July 12 days
June 11 days
August 10 days
The most windy months:
January 11 mph
February 11 mph
December 11 mph
more details