18.09
fri
fri
Day

75°F
SW 22 mph
Precip.
4%
4%
Night

70°F
S 17 mph
Precip.
18%
18%
19.09
sat
sat
Day

73°F
S 14 mph
Precip.
21%
21%
Night

72°F
S 19 mph
Precip.
36%
36%
20.09
sun
sun
Day

72°F
S 19 mph
Precip.
78%
78%
Night

72°F
S 23 mph
Precip.
94%
94%
21.09
mon
mon
Day

81°F
N 6 mph
Precip.
4%
4%
Night

75°F
NW 5 mph
Precip.
21%
21%
22.09
tue
tue
Day

77°F
W 6 mph
Precip.
3%
3%
Night

73°F
SW 2 mph
Precip.
23%
23%
23.09
wed
wed
Day

77°F
NW 6 mph
Precip.
14%
14%
Night

73°F
E 7 mph
Precip.
10%
10%
24.09
thu
thu
Day

77°F
NW 7 mph
Precip.
6%
6%
Night

73°F
SW 12 mph
Precip.
18%
18%
25.09
fri
fri
Day

77°F
W 6 mph
Precip.
4%
4%
Night

73°F
SE 3 mph
Precip.
19%
19%
26.09
sat
sat
Day

77°F
N 11 mph
Precip.
8%
8%
Night

75°F
NE 12 mph
Precip.
24%
24%
27.09
sun
sun
Day

75°F
W 7 mph
Precip.
6%
6%
Night

72°F
SW 14 mph
Precip.
29%
29%
28.09
mon
mon
Day

66°F
S 15 mph
Precip.
71%
71%
Night

66°F
S 12 mph
Precip.
24%
24%
29.09
tue
tue
Day

68°F
N 7 mph
Precip.
37%
37%
Night

75°F
NE 14 mph
Precip.
11%
11%
30.09
wed
wed
Day

72°F
S 6 mph
Precip.
45%
45%
Night

66°F
NE 11 mph
Precip.
3%
3%
01.10
thu
thu
Day

66°F
N 6 mph
Precip.
11%
11%
Night

66°F
NE 6 mph
Precip.
33%
33%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 78.8°F. The highest and lowest sea temperatures during the month were 80.2°F and 76.6°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 75.1°F. The highest and lowest sea temperatures during the month were 77.5°F and 72.7°F.
Air temperature in Hakone, °F
Precipitation total in Hakone, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Hakone
Hakone on a weather map
Places in Japan:
Name
°F
24 Hours Forecast
Hakone
Local time: 11:56
September 18, friday
1200

75°F
SW
22 mph
22 mph
1500

75°F
SW
21 mph
21 mph
1800

72°F
SW
21 mph
21 mph
2100

72°F
SW
18 mph
18 mph
September 19, saturday
0000

70°F
S
17 mph
17 mph
0300

70°F
S
15 mph
15 mph
0600

72°F
S
14 mph
14 mph
0900

72°F
S
15 mph
15 mph




























