Current sea water temperature:
+67.5°F
| Minimum sea water temperature in December: | 68.9°F |
| Maximum sea water temperature in December: | 58.3°F |
| Average sea water temperature in December: | 64.2°F |
| more information | |
14 days
forecast
forecast
| Hakone |
monthly
weather
weather
| Hakone |
Sea water temperature for the last 10 days:
| December 5 | 67.5°F | November 30 | 68.9°F |
| December 4 | 68.9°F | November 29 | 68.4°F |
| December 3 | 68.4°F | November 28 | 69.8°F |
| December 2 | 68.4°F | November 27 | 68.9°F |
| December 1 | 68.7°F | November 26 | 67.6°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 80.9°F. The highest and lowest sea temperatures during the month were 82.8°F and 79.9°F.
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.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 80.0°F. The highest and lowest sea temperatures during the month were 82.4°F and 77.0°F.
current
weather
weather
| Hakone |
weather in
December
December
| Hakone |
Best time for vacation in Hakone
Hakone on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hakone
Local time: 23:47
December 06, saturday
0000
43°F
S
2 mph
2 mph
0300
41°F
SE
2 mph
2 mph
0600
41°F
S
4 mph
4 mph
0900
48°F
SW
3 mph
3 mph
1200
52°F
N
3 mph
3 mph
1500
54°F
N
5 mph
5 mph
1800
48°F
E
6 mph
6 mph
2100
46°F
E
7 mph
7 mph
