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:
2026
2025
2024
The average sea water temperature in September of 2026 was 78.2°F. The highest and lowest sea temperatures during the month were 80.2°F and 76.5°F.
Monthly sea water temperature in Hakone, °F
Which Japan resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Okinawa | 83.6°F | 85.9°F |
| Nagasaki | 81.9°F | 83.9°F |
| Kobe | 81.2°F | 81.5°F |
| Osaka | 81.2°F | 82.5°F |
| Nara | 80.6°F | 82.6°F |
| Fukuoka | 80.2°F | 83.2°F |
| Nagoya | 79.4°F | 82.2°F |
| Hiroshima | 79.3°F | 81.4°F |
| Kyoto | 79.1°F | 82.6°F |
| Hakone | 78.2°F | 79.4°F |
| Atami | 78.1°F | 79.7°F |
| Tokyo | 77.9°F | 81.6°F |
| Yokohama | 77.8°F | 80.9°F |
| Kamakura | 77.7°F | 79.6°F |
| Sapporo | 71.1°F | 73.2°F |
| Noboribetsu | 68.6°F | 71.1°F |
Best time for vacation in Hakone
Hakone on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hakone
Local time: 01:09
October 30, friday
0300
57°F
SE
2 mph
2 mph
0600
55°F
SE
2 mph
2 mph
0900
59°F
SE
3 mph
3 mph
1200
66°F
N
5 mph
5 mph
1500
70°F
N
11 mph
11 mph
1800
63°F
E
7 mph
7 mph
2100
61°F
E
7 mph
7 mph
October 31, saturday
0000
59°F
E
6 mph
6 mph
