Warmest sea in South Korea in May

62 coastal locations in South Korea ranked by their typical May sea temperature. Region-wide average in May: 15.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in May

Seogwipo

18.7°C May mean in South Korea

Regional May average

15.4°C

across all 62 coastal locations in South Korea

Vs annual mean

-1.7°C

below the year-round regional average

What the South Korea sea feels like in May

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

South Korea monthly average 9.9°C to 26.2°C

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 May fits in the year

May 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 May 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 May

Sorted by the typical May 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	Country	May mean
1	Seogwipo Jeju-do	South Korea	18.7°C
2	Hwasun Jeju-do	South Korea	18.3°C
3	Udo Sudo Jeju-do	South Korea	17.5°C
4	Jukdo Jeju-do	South Korea	17.3°C
5	Sinhyeon	South Korea	17.3°C
6	Ulsan	South Korea	17.3°C
7	Busan	South Korea	17.2°C
8	Gampo Gyeongsangbuk-do	South Korea	16.9°C
9	Chinhae	South Korea	16.8°C
10	Masan	South Korea	16.8°C
11	Gadeokdo Busan	South Korea	16.7°C
12	Geoje	South Korea	16.6°C
13	Gwanyang Jeollanam-do	South Korea	16.6°C
14	Kyosai	South Korea	16.6°C
15	Yeosu Jeollanam-do	South Korea	16.6°C
16	Jeju	South Korea	16.5°C
17	Jejudo	South Korea	16.5°C
18	Jisepo Gyeongsangnam-do	South Korea	16.5°C
19	Sunchun	South Korea	16.5°C
20	Reisui	South Korea	16.4°C
21	Hoko	South Korea	16.4°C
22	Pohang	South Korea	16.4°C
23	Yokjido Gyeongsangnam-do	South Korea	16.3°C
24	Ganggu Gyeongsangnam-do	South Korea	16.2°C
25	Geomundo Jeollanam-do	South Korea	16.2°C

Show 25 more ▸

26	Narodo Jeollanam-do	South Korea	16.0°C
27	Chujado Jeju-do	South Korea	16.0°C
28	Geumdangdo Jeollanam-do	South Korea	15.9°C
29	Ulleungdo Gyeongsangbuk-do	South Korea	15.9°C
30	Jukbyeon Gyeongsangbuk-do	South Korea	15.8°C
31	Cheongsando Jeollanam-do	South Korea	15.7°C
32	Wando Jeollanam-do	South Korea	15.7°C
33	Soando Jeollanam-do	South Korea	15.6°C
34	Tonghae	South Korea	15.5°C
35	Wido Jeollabuk-do	South Korea	15.5°C
36	Mukho Gangwon-do	South Korea	15.4°C
37	Gangneung	South Korea	15.3°C
38	Boryeong	South Korea	15.3°C
39	Jumunjin Gangwon-do	South Korea	15.3°C
40	Kunsan	South Korea	15.3°C
41	Yongpyong	South Korea	15.2°C
42	Sokcho	South Korea	15.1°C
43	Moppo	South Korea	14.9°C
44	Sinan	South Korea	14.9°C
45	Byeokpajin Jeollanam-do	South Korea	14.9°C
46	Eoranjin Jeollanam-do	South Korea	14.9°C
47	Modo Jeollanam-do	South Korea	14.9°C
48	Sangmado Jeollanam-do	South Korea	14.9°C
49	Hataedo Jeollanam-do	South Korea	14.6°C
50	Daeheuksando Jeollanam-do	South Korea	14.1°C

Coldest 10 in South Korea in May

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

#	Location	Country	May mean
1	Baengnyeongdo Incheon	South Korea	11.2°C
2	Daecheongdo Incheon	South Korea	11.2°C
3	Mohang-ri Chungcheongnam-do	South Korea	11.9°C
4	Taesal Li	South Korea	12.4°C
5	Anheung Chungcheongnam-do	South Korea	12.6°C
6	Hwaseong	South Korea	12.8°C
7	Incheon	South Korea	12.8°C
8	Ansan	South Korea	13.0°C
9	Goyang	South Korea	13.0°C
10	Seoul	South Korea	13.0°C