Measurements:
°C
°F
Hakone
50°F
E 3 mph
Feels like: 50°F
Precip: 30%
World Resorts Japan Hakone Weather

Hakone Sea Water Temperature

Current Sea Water Temperature:
+73.0°F
Maximum Sea Water Temperature in November: 77.6°F
Minimum Sea Water Temperature in November: 65.6°F
Average water temperature in November: 71.4°F

Sea Water Temperature for the Last 10 Days:

November 12 73.0°F November 07 73.8°F
November 11 73.2°F November 06 74.2°F
November 10 73.2°F November 05 73.0°F
November 09 73.0°F November 04 73.6°F
November 08 73.4°F November 03 74.6°F

When is the Warmest Sea for Hakone?

According to our data for the last three years for Hakone the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Hakone was 84.6°F. The maximum and minimum values were 83.4°F and 85.6°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Hakone was 81.3°F. The maximum and minimum values were 79.4°F and 83.6°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Hakone was 81.2°F. The maximum and minimum values were 75.6°F and 86.0°F respectively.

Best Time to Visit Hakone
The most sunny months:
January 17 days
December 17 days
May 13 days
The most warm months:
August 90.8 °F
July 88.1 °F
September 84.3 °F
Warmest sea temperature:
August 83.9 °F
September 81.7 °F
July 79.8 °F
The most cold months:
January 48.7 °F
February 49.7 °F
December 54.3 °F
The most rainy months:
July 8 days
June 7 days
September 7 days
The most windy months:
April 8 mph
March 8 mph
October 7 mph

Hakone on the Weather Map

Japan Resorts:
NAME
F°
Atami +52
Fukuoka +56
Hakone +50
Hiroshima +58
Kamakura +52
Kobe +58
Kyoto +52
Nagasaki +64
Nagoya +52
Noboribetsu +42
Okinawa +74
Osaka +56
Sapporo +40
Tokyo +52
Yokohama +52
24 Hours Weather Forecast
Hakone
Local time: 23:24
13 nov, friday
0000 50°F
E
3 mph
0300 50°F
E
4 mph
0600 50°F
E
4 mph
0900 62°F
NE
2 mph
1200 68°F
NE
5 mph
1500 66°F
NE
6 mph
1800 58°F
SE
2 mph
2100 54°F
SE
2 mph