Average sea water temperature in September:
+78.3°F
| Minimum sea water temperature in September: | 85.3°F |
| Maximum sea water temperature in September: | 74.3°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 81.4°F. The highest and lowest sea temperatures during the month were 84.7°F and 77.5°F.
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| Hiroshima |
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| Hiroshima |
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| Hiroshima |
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| Hiroshima |
Monthly sea water temperature in Hiroshima, °F
Which Japan resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Okinawa | 85.9°F | 85.3°F |
| Nagasaki | 83.9°F | 83.8°F |
| Fukuoka | 83.2°F | 82.6°F |
| Kyoto | 82.6°F | 84.0°F |
| Nara | 82.6°F | 83.6°F |
| Osaka | 82.5°F | 83.4°F |
| Nagoya | 82.2°F | 84.0°F |
| Tokyo | 81.6°F | 81.9°F |
| Kobe | 81.5°F | 82.7°F |
| Hiroshima | 81.4°F | 82.2°F |
| Yokohama | 80.9°F | 81.6°F |
| Atami | 79.7°F | 81.1°F |
| Kamakura | 79.6°F | 81.0°F |
| Hakone | 79.4°F | 81.1°F |
| Sapporo | 73.2°F | 72.2°F |
| Noboribetsu | 71.1°F | 71.5°F |
Best time for vacation in Hiroshima
Hiroshima on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hiroshima
Local time: 05:20
December 17, wednesday
0600
45°F
E
3 mph
3 mph
0900
50°F
NE
4 mph
4 mph
1200
55°F
NE
7 mph
7 mph
1500
52°F
NE
6 mph
6 mph
1800
50°F
E
1 mph
1 mph
2100
50°F
S
6 mph
6 mph
December 18, thursday
0000
48°F
S
5 mph
5 mph
0300
45°F
S
5 mph
5 mph
