World Resorts Japan Hakone Weather

Hakone Sea Temperature in August

Average sea water temperature in August:
+80.4°F
Minimum sea water temperature in August: 84.9°F
Maximum sea water temperature in August: 75.9°F

Daily 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.

Monthly sea water temperature in Hakone, °F

Which Japan resorts have warmest sea in August?

Place name August 2025 August 2024
Nagoya 86.4°F 86.2°F
Kyoto 86.3°F 86.2°F
Nara 85.7°F 85.2°F
Osaka 85.5°F 84.8°F
Okinawa 85.4°F 86.5°F
Fukuoka 85.2°F 85.9°F
Nagasaki 84.8°F 85.5°F
Kobe 84.8°F 83.6°F
Tokyo 83.7°F 84.3°F
Hiroshima 83.2°F 84.6°F
Yokohama 82.8°F 83.8°F
Kamakura 81.5°F 82.8°F
Hakone 80.9°F 82.8°F
Atami 80.7°F 82.8°F
Sapporo 77.2°F 74.6°F
Noboribetsu 74.8°F 74.5°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
+43°F
S 2 mph
Feels like: +41°F
Precip.: 0%
Places in Japan:
Name
°F
+43°F
+48°F
+50°F
+37°F
+43°F
+43°F
+41°F
+39°F
+63°F
+45°F
+30°F
+46°F
+41°F
+43°F
+36°F
24 Hours Forecast
Hakone
Local time: 00:31
December 06, saturday
0300
41°F
SE
2 mph
0600
41°F
S
4 mph
0900
48°F
SW
3 mph
1200
52°F
N
3 mph
1500
54°F
N
5 mph
1800
48°F
E
6 mph
2100
46°F
E
7 mph
December 07, sunday
0000
45°F
E
7 mph
Units of measurement: °C / °F