Skip to content
seatemperatures.net

Warmest sea in South Korea

62 coastal locations in South Korea ranked by their year-round average sea temperature. The regional average is 17.1°C. The top of the list shows where to find the warmest water in a typical year. The bottom shows the coldest year-round coasts of the region.

Warmest location

Seogwipo

21.4°C annual mean in South Korea

Regional average

17.1°C

across all 62 South Korea coastal locations

Warmest month

August

26.2°C region-wide average

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

Month by month across South Korea

Sea temperatures in South Korea swing from 9.9°C in February to 26.2°C in August on average across every coast we track. That spread of 16°C hides much bigger swings at individual locations.

Want a specific month? Pick one for a dedicated ranking:

South Korea sea temperature map

Today's pin colours show the latest daily reading at every South Korea location we track. Pick any pin for the location's full page.

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 locations in South Korea

The warmest coastal locations across all of South Korea, sorted by year-round average. Click any place for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Seogwipo Jeju-do 21.4°C
2 Hwasun Jeju-do 21.1°C
3 Jukdo Jeju-do 20.3°C
4 Udo Sudo Jeju-do 20.3°C
5 Busan 19.5°C
6 Sinhyeon 19.4°C
7 Ulsan 19.4°C
8 Jeju 19.4°C
9 Jejudo 19.4°C
10 Gadeokdo Busan 19.1°C
11 Chinhae 19.1°C
12 Masan 19.1°C
13 Gampo Gyeongsangbuk-do 19.0°C
14 Geoje 18.8°C
15 Jisepo Gyeongsangnam-do 18.8°C
16 Kyosai 18.8°C
17 Chujado Jeju-do 18.6°C
18 Yokjido Gyeongsangnam-do 18.3°C
19 Geomundo Jeollanam-do 18.2°C
20 Ganggu Gyeongsangnam-do 18.0°C
21 Ulleungdo Gyeongsangbuk-do 18.0°C
22 Cheongsando Jeollanam-do 18.0°C
23 Wando Jeollanam-do 18.0°C
24 Hoko 18.0°C
25 Pohang 18.0°C
Show 25 more ▸
26 Reisui 17.9°C
27 Soando Jeollanam-do 17.9°C
28 Jukbyeon Gyeongsangbuk-do 17.8°C
29 Gwanyang Jeollanam-do 17.5°C
30 Yeosu Jeollanam-do 17.5°C
31 Mukho Gangwon-do 17.4°C
32 Narodo Jeollanam-do 17.3°C
33 Tonghae 17.2°C
34 Geumdangdo Jeollanam-do 17.1°C
35 Jumunjin Gangwon-do 17.1°C
36 Sunchun 17.1°C
37 Yongpyong 16.9°C
38 Gangneung 16.9°C
39 Sokcho 16.5°C
40 Byeokpajin Jeollanam-do 16.2°C
41 Eoranjin Jeollanam-do 16.2°C
42 Modo Jeollanam-do 16.2°C
43 Sangmado Jeollanam-do 16.2°C
44 Hataedo Jeollanam-do 16.1°C
45 Daeheuksando Jeollanam-do 16.0°C
46 Wido Jeollabuk-do 15.8°C
47 Boryeong 15.5°C
48 Kunsan 15.5°C
49 Eocheongdo Jeollabuk-do 15.5°C
50 Moppo 15.1°C

Coldest 10 in South Korea for contrast

Same data, sorted the other way. Useful if you want to know which South Korea coasts stay coldest year-round.

# Location Annual mean
1 Taesal Li 13.9°C
2 Daeyeonpyeongdo Incheon 14.0°C
3 Baengnyeongdo Incheon 14.0°C
4 Daecheongdo Incheon 14.0°C
5 Ansan 14.1°C
6 Goyang 14.1°C
7 Seoul 14.1°C
8 Hwaseong 14.1°C
9 Incheon 14.1°C
10 Mohang-ri Chungcheongnam-do 14.2°C

More on this region