18.12
thu
thu
Day
50°F
S 6 mph
Precip.
0%
0%
Night
46°F
N 4 mph
Precip.
0%
0%
19.12
fri
fri
Day
61°F
N 5 mph
Precip.
0%
0%
Night
54°F
N 6 mph
Precip.
0%
0%
20.12
sat
sat
Day
66°F
E 7 mph
Precip.
0%
0%
Night
52°F
SE 11 mph
Precip.
0%
0%
21.12
sun
sun
Day
45°F
S 17 mph
Precip.
0%
0%
Night
41°F
S 9 mph
Precip.
0%
0%
22.12
mon
mon
Day
48°F
SW 11 mph
Precip.
0%
0%
Night
50°F
W 15 mph
Precip.
0%
0%
23.12
tue
tue
Day
59°F
NW 12 mph
Precip.
0%
0%
Night
59°F
E 17 mph
Precip.
79%
79%
24.12
wed
wed
Day
48°F
SE 21 mph
Precip.
77%
77%
Night
41°F
S 22 mph
Precip.
74%
74%
25.12
thu
thu
Day
43°F
S 16 mph
Precip.
0%
0%
Night
41°F
S 9 mph
Precip.
0%
0%
26.12
fri
fri
Day
46°F
S 4 mph
Precip.
0%
0%
Night
46°F
W 6 mph
Precip.
77%
77%
27.12
sat
sat
Day
48°F
S 16 mph
Precip.
100%
100%
Night
46°F
SE 14 mph
Precip.
0%
0%
28.12
sun
sun
Day
48°F
SE 17 mph
Precip.
0%
0%
Night
43°F
S 7 mph
Precip.
0%
0%
29.12
mon
mon
Day
52°F
E 6 mph
Precip.
0%
0%
Night
48°F
SE 12 mph
Precip.
100%
100%
30.12
tue
tue
Day
48°F
SE 22 mph
Precip.
100%
100%
Night
41°F
SE 25 mph
Precip.
69%
69%
31.12
wed
wed
Day
39°F
SE 28 mph
Precip.
72%
72%
Night
39°F
SE 17 mph
Precip.
0%
0%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 65.6°F. The highest and lowest sea temperatures during the month were 67.6°F and 63.5°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 59.4°F. The highest and lowest sea temperatures during the month were 60.8°F and 57.6°F.
Air temperature in Jeju, °F
Precipitation total in Jeju, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 18:34
December 18, thursday
2100
46°F
NW
4 mph
4 mph
December 19, friday
0000
46°F
N
4 mph
4 mph
0300
46°F
N
5 mph
5 mph
0600
48°F
NW
3 mph
3 mph
0900
52°F
NW
4 mph
4 mph
1200
61°F
N
5 mph
5 mph
1500
61°F
N
2 mph
2 mph
1800
54°F
NW
3 mph
3 mph
