World Resorts Japan Hakone Weather

Hakone sea water temperature

Current sea water temperature:
+75.2°F
Minimum sea water temperature in October: 79.2°F
Maximum sea water temperature in October: 69.6°F
Average sea water temperature in October: 73.8°F

Sea water temperature for the last 10 days:

October 8 75.2°F October 3 76.1°F
October 7 75.0°F October 2 76.5°F
October 6 74.7°F October 1 76.6°F
October 5 74.5°F September 30 77.4°F
October 4 75.2°F September 29 77.0°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 78.2°F. The highest and lowest sea temperatures during the month were 80.2°F and 76.5°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.

Best time for vacation in Hakone

Sunniest months:
January 17 days
December 17 days
May 13 days
Warmest months:
August 86.7 °F
July 84.2 °F
September 80.9 °F
Warmest sea temp:
August 80.5 °F
September 78.5 °F
July 76.9 °F
Coldest months:
January 48.9 °F
February 49.7 °F
December 53.8 °F
Rainiest months:
July 8 days
June 7 days
September 7 days
Windiest months:
April 8.5 mph
March 8.5 mph
October 8.0 mph

Hakone on a weather map

Hakone
+68°F
S 2 mph
Feels like: +68°F
Precip.: 17%
Places in Japan:
Name
°F
+64°F
+70°F
+72°F
+63°F
+64°F
+68°F
+68°F
+63°F
+77°F
+66°F
+46°F
+70°F
+59°F
+68°F
+54°F
24 Hours Forecast
Hakone
Local time: 22:44
October 09, friday
0000
68°F
S
2 mph
0300
68°F
S
4 mph
0600
66°F
S
6 mph
0900
70°F
SW
7 mph
1200
72°F
NW
6 mph
1500
72°F
N
5 mph
1800
70°F
NW
3 mph
2100
70°F
W
6 mph
Units of measurement: °C / °F