The Japan resorts with the warmest sea water temperature in September are Okinawa, Kyoto and Nagoya.
Below you can see a list of all popular Japan resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2024 | September 2023 | September 2022 |
|---|---|---|---|
| Okinawa | 89.2°F | 88.5°F | 87.5°F |
| Kyoto | 87.8°F | 85.5°F | 83.9°F |
| Nagoya | 87.7°F | 87.5°F | 85.0°F |
| Nagasaki | 87.6°F | 86.2°F | 84.2°F |
| Nara | 87.3°F | 85.7°F | 83.9°F |
| Osaka | 87.2°F | 85.8°F | 83.9°F |
| Kobe | 86.4°F | 85.6°F | 84.0°F |
| Fukuoka | 86.2°F | 84.5°F | 82.1°F |
| Hiroshima | 85.8°F | 83.5°F | 82.3°F |
| Tokyo | 85.5°F | 85.0°F | 81.8°F |
| Yokohama | 85.1°F | 84.6°F | 81.3°F |
| Atami | 84.6°F | 84.0°F | 82.2°F |
| Hakone | 84.5°F | 83.9°F | 81.5°F |
| Kamakura | 84.4°F | 83.9°F | 80.9°F |
| Sapporo | 74.7°F | 77.0°F | 72.6°F |
| Noboribetsu | 73.9°F | 76.0°F | 70.9°F |
Please see following sea water temperature averages charts for the warmest Japan resorts in September.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
15
30
45
60
75
90
105
77.3
80.7
84.2
87.4
88.3
87.3
83.1
78.6
74.9
73
72.8
74.3
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
14
28
42
56
70
84
98
112
58.2
65.1
73.3
81
84.6
80.1
71.7
64.2
56.7
51.2
51.4
53.3
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
14
28
42
56
70
84
98
112
61.4
69.3
75.4
82.7
86.9
83.1
75.4
67.3
60.5
56.3
55.2
56.4
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
