Current Sea Water Temperature:
+66.6°F
| Maximum Sea Water Temperature in April: | 69.0°F |
| Minimum Sea Water Temperature in April: | 56.6°F |
| Average water temperature in April: | 62.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| April 26 | 66.6°F | April 21 | 65.6°F |
| April 25 | 67.0°F | April 20 | 65.0°F |
| April 24 | 66.2°F | April 19 | 64.4°F |
| April 23 | 66.6°F | April 18 | 64.8°F |
| April 22 | 65.8°F | April 17 | 63.8°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
The average sea surface temperature in August 2025 for Hakone was 84.3°F. The maximum and minimum values were 83.2°F and 86.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Hakone was 82.7°F. The maximum and minimum values were 78.6°F and 85.4°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Hakone was 83.4°F. The maximum and minimum values were 80.0°F and 86.0°F respectively.
Japan Resorts:
NAME
F°
| Atami |  |
+58 |
| Fukuoka |  |
+56 |
| Hakone |  |
+60 |
| Hiroshima | |
+56 |
| Kamakura | |
+62 |
| Kobe | |
+60 |
| Kyoto | |
+56 |
| Nagasaki | |
+60 |
| Nagoya | |
+58 |
| Nara | |
+58 |
| Okinawa |  |
+66 |
| Osaka | |
+60 |
| Sapporo | |
+44 |
| Tokyo | |
+62 |
| Yokohama | |
+62 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Hakone
Local time: 02:14
27 apr, monday
| 0300 |  |
60°F | S 11 mph |
| 0600 |  |
58°F | S 12 mph |
| 0900 | |
60°F | S 6 mph |
| 1200 | |
62°F | NE 4 mph |
| 1500 | |
62°F | SW 4 mph |
| 1800 |  |
60°F | W 2 mph |
| 2100 |  |
60°F | NE 2 mph |
28 apr, tuesday
| 0000 |  |
60°F | NE 6 mph |