Measurements:
°C
°F
CURRENT WEATHER
05:30
Hiroshima
74°F
S 7 mph
Feels like: 74°F
Precip: 39%
World Resorts Japan Hiroshima Weather

7 Day Weather Forecast

09.09
wed
DAY
74°F
S 8 mph
precip
22%
NIGHT
64°F
S 6 mph
precip
12%
09.10
thu
DAY
82°F
SW 5 mph
precip
10%
NIGHT
68°F
S 3 mph
precip
41%
09.11
fri
DAY
70°F
S 2 mph
precip
75%
NIGHT
70°F
SW 2 mph
precip
77%
09.12
sat
DAY
80°F
SW 1 mph
precip
30%
NIGHT
74°F
S 1 mph
precip
42%
09.13
sun
DAY
86°F
N 5 mph
precip
49%
NIGHT
74°F
S 2 mph
precip
52%
09.14
mon
DAY
86°F
NE 4 mph
precip
12%
NIGHT
74°F
N 2 mph
precip
74%
09.15
tue
DAY
74°F
NE 2 mph
precip
63%
NIGHT
72°F
NE 1 mph
precip
73%

Hiroshima Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Hiroshima was 27.4°F. The maximum and minimum values were 25.3°F and 29.3°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 85.7 °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