Measurements:
°C
°F
CURRENT WEATHER
08:50
Hiroshima
66°F
W 2 mph
Feels like: 66°F
Precip: 44%
World Resorts Japan Hiroshima Weather

7 Day Weather Forecast

09.29
tue
DAY
68°F
SW 3 mph
precip
32%
NIGHT
64°F
S 4 mph
precip
20%
09.30
wed
DAY
80°F
NW 1 mph
precip
3%
NIGHT
66°F
SW 1 mph
precip
19%
10.01
thu
DAY
82°F
E 2 mph
precip
2%
NIGHT
58°F
S 5 mph
precip
12%
10.02
fri
DAY
74°F
SW 6 mph
precip
2%
NIGHT
54°F
S 6 mph
precip
12%
10.03
sat
DAY
76°F
NW 2 mph
precip
1%
NIGHT
62°F
S 3 mph
precip
28%
10.04
sun
DAY
78°F
S 8 mph
precip
1%
NIGHT
58°F
S 6 mph
precip
14%
10.05
mon
DAY
72°F
S 14 mph
precip
1%
NIGHT
56°F
S 5 mph
precip
21%

Hiroshima Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Hiroshima was 26.4°F. The maximum and minimum values were 25.4°F and 28.4°F respectively.

Hiroshima on the Weather Map

Best Time to Visit Hiroshima
The most sunny months:
May 16 days
October 15 days
April 14 days
The most warm months:
August 92.5 °F
July 89.7 °F
September 85.3 °F
Warmest sea temperature:
August 84.8 °F
September 81.5 °F
July 80.8 °F
The most cold months:
January 45.8 °F
February 47.6 °F
December 49.7 °F
The most rainy months:
July 9 days
June 9 days
August 8 days
The most windy months:
December 6 mph
January 6 mph
February 6 mph
more details