Current sea water temperature:
+76.6°F
| Minimum sea water temperature in September: | 83.3°F |
| Maximum sea water temperature in September: | 74.7°F |
| Average sea water temperature in September: | 78.6°F |
| more information | |
14 days
forecast
forecast
| Hakone |
monthly
weather
weather
| Hakone |
Sea water temperature for the last 10 days:
| September 17 | 76.6°F | September 12 | 79.2°F |
| September 16 | 77.2°F | September 11 | 79.2°F |
| September 15 | 77.5°F | September 10 | 79.5°F |
| September 14 | 77.7°F | September 9 | 80.2°F |
| September 13 | 78.8°F | September 8 | 78.8°F |
Monthly sea water temperature, °F
When is the warmest sea in Hakone?
Based on the data about daily sea water temperature for the last three years the warmest sea in Hakone was noticed in August, September and July.
Monthly Sea Temperatures in Hakone, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 81.2°F. The highest and lowest sea temperatures during the month were 82.0°F and 80.1°F.
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.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 78.1°F. The highest and lowest sea temperatures during the month were 82.4°F and 73.0°F.
current
weather
weather
| Hakone |
weather in
September
September
| Hakone |
Best time for vacation in Hakone
Hakone on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hakone
Local time: 11:07
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
