World Resorts South Korea Jeju Weather

Jeju 7 Days Forecast

18.05
mon
Day
75°F
S 5 mph
Precip.
0%
Night
66°F
NW 2 mph
Precip.
0%
19.05
tue
Day
73°F
W 2 mph
Precip.
0%
Night
70°F
W 9 mph
Precip.
100%
20.05
wed
Day
66°F
W 19 mph
Precip.
100%
Night
66°F
W 7 mph
Precip.
100%
21.05
thu
Day
63°F
SW 19 mph
Precip.
100%
Night
63°F
SW 17 mph
Precip.
76%
22.05
fri
Day
66°F
W 13 mph
Precip.
0%
Night
64°F
W 11 mph
Precip.
61%
23.05
sat
Day
70°F
W 5 mph
Precip.
100%
Night
66°F
W 5 mph
Precip.
82%
24.05
sun
Day
73°F
W 9 mph
Precip.
64%
Night
66°F
W 4 mph
Precip.
0%

Sea water temperature in May, °F

Show year:
2026
2025
2024

The average sea water temperature in May of 2026 was 62.5°F. The highest and lowest sea temperatures during the month were 64.9°F and 59.5°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

Sunniest months:
May 15 days
October 14 days
April 14 days
Warmest months:
August 84.5 °F
July 82.0 °F
September 77.7 °F
Warmest sea temp:
August 81.2 °F
September 77.5 °F
July 76.6 °F
Coldest months:
January 44.8 °F
February 46.3 °F
December 48.6 °F
Rainiest months:
August 8 days
September 7 days
July 7 days
Windiest months:
January 14.4 mph
December 14.1 mph
February 13.9 mph

Jeju on a weather map

Current weather
03:15
Jeju
+63°F
NW 2 mph
Feels like: +63°F
Precip.: 0%
Places in South Korea:
Name
°F
Yongpyong
+61°F
Incheon
+64°F
Muju
+55°F
Busan
+63°F
Seoul
+64°F
Jeju
+63°F
24 Hours Forecast
Jeju
Local time: 03:15
May 18, monday
0600
63°F
NW
4 mph
0900
72°F
SE
4 mph
1200
75°F
S
5 mph
1500
77°F
S
5 mph
1800
73°F
S
4 mph
2100
68°F
N
4 mph
May 19, tuesday
0000
66°F
NW
2 mph
0300
64°F
N
4 mph
Units of measurement: °C / °F