18.09
fri
fri
Day

70°F
S 4 mph
Precip.
42%
42%
Night

66°F
S 3 mph
Precip.
52%
52%
19.09
sat
sat
Day

72°F
SW 2 mph
Precip.
33%
33%
Night

64°F
S 6 mph
Precip.
20%
20%
20.09
sun
sun
Day

77°F
S 14 mph
Precip.
3%
3%
Night

66°F
S 6 mph
Precip.
25%
25%
21.09
mon
mon
Day

77°F
S 11 mph
Precip.
2%
2%
Night

61°F
S 5 mph
Precip.
14%
14%
22.09
tue
tue
Day

79°F
W 2 mph
Precip.
1%
1%
Night

64°F
S 2 mph
Precip.
13%
13%
23.09
wed
wed
Day

77°F
N 6 mph
Precip.
4%
4%
Night

68°F
SE 0 mph
Precip.
21%
21%
24.09
thu
thu
Day

73°F
SW 3 mph
Precip.
37%
37%
Night

64°F
S 4 mph
Precip.
19%
19%
25.09
fri
fri
Day

81°F
N 4 mph
Precip.
3%
3%
Night

66°F
S 1 mph
Precip.
14%
14%
26.09
sat
sat
Day

77°F
NE 7 mph
Precip.
15%
15%
Night

68°F
S 1 mph
Precip.
80%
80%
27.09
sun
sun
Day

81°F
SW 6 mph
Precip.
18%
18%
Night

64°F
S 5 mph
Precip.
25%
25%
28.09
mon
mon
Day

77°F
N 5 mph
Precip.
12%
12%
Night

68°F
NE 1 mph
Precip.
30%
30%
29.09
tue
tue
Day

70°F
N 6 mph
Precip.
79%
79%
Night

59°F
SE 14 mph
Precip.
7%
7%
30.09
wed
wed
Day

66°F
S 14 mph
Precip.
11%
11%
Night

52°F
S 2 mph
Precip.
12%
12%
01.10
thu
thu
Day

68°F
SW 4 mph
Precip.
1%
1%
Night

54°F
S 4 mph
Precip.
20%
20%
sea water
temperature
temperature
| Hiroshima |
monthly
weather
weather
| Hiroshima |
current
weather
weather
| Hiroshima |
7 days
forecast
forecast
| Hiroshima |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 80.2°F. The highest and lowest sea temperatures during the month were 83.1°F and 77.7°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 75.8°F. The highest and lowest sea temperatures during the month were 78.1°F and 72.0°F.
Air temperature in Hiroshima, °F
Precipitation total in Hiroshima, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Hiroshima
Hiroshima on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hiroshima
Local time: 09:28
September 18, friday
1200

70°F
S
4 mph
4 mph
1500

70°F
S
4 mph
4 mph
1800

68°F
S
4 mph
4 mph
2100

68°F
S
4 mph
4 mph
September 19, saturday
0000

66°F
S
3 mph
3 mph
0300

68°F
S
4 mph
4 mph
0600

68°F
S
3 mph
3 mph
0900

70°F
SW
4 mph
4 mph




























