Average sea water temperature in September:
+78.6°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 78.8°F. The highest and lowest sea temperatures during the month were 80.2°F and 76.6°F.
Monthly sea water temperature in Hakone, °F
Which Japan resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Okinawa | 83.4°F | 85.9°F |
| Nagasaki | 83.0°F | 83.9°F |
| Fukuoka | 81.9°F | 83.2°F |
| Kobe | 81.9°F | 81.5°F |
| Osaka | 81.9°F | 82.5°F |
| Nara | 81.5°F | 82.6°F |
| Nagoya | 80.4°F | 82.2°F |
| Hiroshima | 80.2°F | 81.4°F |
| Kyoto | 80.0°F | 82.6°F |
| Tokyo | 80.0°F | 81.6°F |
| Yokohama | 79.4°F | 80.9°F |
| Kamakura | 79.1°F | 79.6°F |
| Atami | 78.9°F | 79.7°F |
| Hakone | 78.8°F | 79.4°F |
| Sapporo | 71.8°F | 73.2°F |
| Noboribetsu | 69.1°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: 11:58
September 18, friday
1200
75°F
SW
22 mph
22 mph
1500
75°F
SW
21 mph
21 mph
1800
72°F
SW
21 mph
21 mph
2100
72°F
SW
18 mph
18 mph
September 19, saturday
0000
70°F
S
17 mph
17 mph
0300
70°F
S
15 mph
15 mph
0600
72°F
S
14 mph
14 mph
0900
72°F
S
15 mph
15 mph
