World Resorts Japan Hakone Weather

Hakone Sea Temperature in December

Average sea water temperature in December:
+64.3°F
Minimum sea water temperature in December: 68.9°F
Maximum sea water temperature in December: 58.3°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 65.7°F. The highest and lowest sea temperatures during the month were 68.9°F and 64.0°F.

Monthly sea water temperature in Hakone, °F

Which Japan resorts have warmest sea in December?

Place name December 2025 December 2024
Okinawa 75.4°F 75.3°F
Nagasaki 67.1°F 64.1°F
Atami 66.2°F 65.8°F
Hakone 65.7°F 65.7°F
Kamakura 65.6°F 65.1°F
Fukuoka 62.5°F 62.2°F
Hiroshima 61.8°F 61.6°F
Kobe 60.6°F 60.1°F
Yokohama 60.3°F 60.4°F
Nagoya 59.6°F 60.7°F
Osaka 59.5°F 58.7°F
Nara 59.0°F 58.2°F
Tokyo 58.3°F 58.4°F
Kyoto 57.2°F 56.4°F
Noboribetsu 49.5°F 50.2°F
Sapporo 44.9°F 45.2°F

Best time for vacation in Hakone

Sunniest months:
January 17 days
December 17 days
November 13 days
Warmest months:
August 87.1 °F
July 84.5 °F
September 81.3 °F
Warmest sea temp:
August 80.4 °F
September 78.5 °F
July 76.8 °F
Coldest months:
January 49.0 °F
February 49.7 °F
December 53.9 °F
Rainiest months:
July 8 days
August 7 days
April 7 days
Windiest months:
April 8.6 mph
March 8.5 mph
October 8.0 mph

Hakone on a weather map

Hakone
+37°F
W 4 mph
Feels like: +36°F
Precip.: 63%
Places in Japan:
Name
°F
+39°F
+39°F
+30°F
+36°F
+37°F
+34°F
+34°F
+19°F
+59°F
+37°F
+16°F
+36°F
+37°F
+37°F
+32°F
24 Hours Forecast
Hakone
Local time: 07:26
December 27, saturday
0900
39°F
W
3 mph
1200
41°F
NW
5 mph
1500
41°F
N
5 mph
1800
41°F
NE
1 mph
2100
39°F
S
6 mph
December 28, sunday
0000
39°F
S
6 mph
0300
37°F
S
4 mph
0600
36°F
SE
4 mph
Units of measurement: °C / °F