The Japan resorts with the warmest sea water temperature in December are Okinawa, Atami and Hakone.
Below you can see a list of all popular Japan resorts and information about sea water temperature in December for the last two years.
| Resort Name | December 2024 | December 2023 | December 2022 |
|---|---|---|---|
| Okinawa | 78.2°F | 78.0°F | 77.5°F |
| Atami | 67.5°F | 65.0°F | 66.9°F |
| Hakone | 67.4°F | 65.0°F | 66.5°F |
| Kamakura | 66.8°F | 64.5°F | 65.6°F |
| Nagasaki | 65.7°F | 65.7°F | 65.6°F |
| Fukuoka | 63.6°F | 63.5°F | 62.8°F |
| Hiroshima | 62.9°F | 62.1°F | 63.4°F |
| Nagoya | 61.9°F | 60.9°F | 61.8°F |
| Yokohama | 61.6°F | 60.7°F | 61.2°F |
| Kobe | 61.2°F | 61.3°F | 61.4°F |
| Osaka | 59.7°F | 60.2°F | 60.5°F |
| Tokyo | 59.3°F | 59.6°F | 58.7°F |
| Nara | 59.1°F | 59.3°F | 59.7°F |
| Kyoto | 57.2°F | 56.9°F | 57.8°F |
| Noboribetsu | 50.2°F | 45.9°F | 48.7°F |
| Sapporo | 44.7°F | 47.0°F | 35.6°F |
Please see following sea water temperature averages charts for the warmest Japan resorts in December.
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
66.1
71.8
76.7
81.8
83.7
79.3
72.9
67.4
62.5
60.9
60.4
62
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
14
28
42
56
70
84
98
112
65.8
71.4
76.3
81.6
83.8
79.5
72.8
67.2
62.3
60.6
60
61.7
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.
