Average sea water temperature in September:
+78.5°F
| Minimum sea water temperature in September: | 83.3°F |
| Maximum sea water temperature in September: | 74.7°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 79.4°F. The highest and lowest sea temperatures during the month were 81.9°F and 75.7°F.
Monthly sea water temperature in Hakone, °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 Hakone
Hakone on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hakone
Local time: 07:26
December 27, saturday
0900
39°F
W
3 mph
3 mph
1200
41°F
NW
5 mph
5 mph
1500
41°F
N
5 mph
5 mph
1800
41°F
NE
1 mph
1 mph
2100
39°F
S
6 mph
6 mph
December 28, sunday
0000
39°F
S
6 mph
6 mph
0300
37°F
S
4 mph
4 mph
0600
36°F
SE
4 mph
4 mph
