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%
sea water
temperature
temperature
| Hiroshima |
monthly
weather
weather
| Hiroshima |
current
weather
weather
| Hiroshima |
14 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: 10:13
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
