Skip to content
seatemperatures.net

Warmest sea in South Korea in December

62 coastal locations in South Korea ranked by their typical December sea temperature. Region-wide average in December: 13.8°C. The top of the list is where to find the warmest swimming this month.

Warmest in December

Seogwipo

19.7°C December mean in South Korea

Regional December average

13.8°C

across all 62 coastal locations in South Korea

Vs annual mean

-3.4°C

below the year-round regional average

What the South Korea sea feels like in December

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

South Korea monthly average 9.9°C to 26.2°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month August 26.2°C
  • Coldest month February 9.9°C
  • Annual mean 17.1°C
  • Months above 20°C 4 of 12

Where December fits in the year

December sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve South Korea month rankings:

South Korea sea temperature map (live)

The map shows today's latest reading at every South Korea location. The list below is based on the typical December mean, useful for trip planning weeks or months ahead.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest South Korea locations in December

Sorted by the typical December mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location December mean
1 Seogwipo Jeju-do 19.7°C
2 Hwasun Jeju-do 19.5°C
3 Jukdo Jeju-do 18.2°C
4 Udo Sudo Jeju-do 18.1°C
5 Busan 17.1°C
6 Sinhyeon 17.1°C
7 Ulsan 17.1°C
8 Gampo Gyeongsangbuk-do 17.0°C
9 Jeju 16.9°C
10 Jejudo 16.9°C
11 Chinhae 16.5°C
12 Masan 16.5°C
13 Gadeokdo Busan 16.5°C
14 Ulleungdo Gyeongsangbuk-do 16.0°C
15 Geoje 15.9°C
16 Kyosai 15.9°C
17 Jisepo Gyeongsangnam-do 15.8°C
18 Chujado Jeju-do 15.7°C
19 Ganggu Gyeongsangnam-do 15.6°C
20 Jukbyeon Gyeongsangbuk-do 15.5°C
21 Hoko 15.5°C
22 Pohang 15.5°C
23 Mukho Gangwon-do 15.2°C
24 Tonghae 14.8°C
25 Yokjido Gyeongsangnam-do 14.8°C
Show 25 more ▸
26 Jumunjin Gangwon-do 14.8°C
27 Geomundo Jeollanam-do 14.7°C
28 Cheongsando Jeollanam-do 14.7°C
29 Wando Jeollanam-do 14.7°C
30 Soando Jeollanam-do 14.6°C
31 Yongpyong 14.5°C
32 Gangneung 14.2°C
33 Reisui 14.1°C
34 Sokcho 13.7°C
35 Gwanyang Jeollanam-do 13.0°C
36 Yeosu Jeollanam-do 13.0°C
37 Narodo Jeollanam-do 12.9°C
38 Daeheuksando Jeollanam-do 12.7°C
39 Geumdangdo Jeollanam-do 12.6°C
40 Hataedo Jeollanam-do 12.6°C
41 Byeokpajin Jeollanam-do 12.5°C
42 Eoranjin Jeollanam-do 12.5°C
43 Modo Jeollanam-do 12.5°C
44 Sangmado Jeollanam-do 12.5°C
45 Sunchun 12.3°C
46 Eocheongdo Jeollabuk-do 11.7°C
47 Anheung Chungcheongnam-do 11.4°C
48 Wido Jeollabuk-do 11.1°C
49 Mohang-ri Chungcheongnam-do 11.0°C
50 Moppo 10.7°C

Coldest 10 in South Korea in December

Same data the other way. Helpful if you want to know which South Korea coasts to avoid for swimming in December.

# Location December mean
1 Daeyeonpyeongdo Incheon 7.9°C
2 Ansan 9.2°C
3 Goyang 9.2°C
4 Seoul 9.2°C
5 Taesal Li 9.7°C
6 Hwaseong 9.7°C
7 Incheon 9.7°C
8 Baengnyeongdo Incheon 10.4°C
9 Daecheongdo Incheon 10.4°C
10 Boryeong 10.5°C

More on this region