World Resorts South Korea Jeju Weather

Jeju 7 Days Forecast

16.09
wed
Day
73°F
SW 15 mph
Precip.
24%
Night
70°F
W 16 mph
Precip.
5%
17.09
thu
Day
72°F
SW 19 mph
Precip.
26%
Night
70°F
W 20 mph
Precip.
31%
18.09
fri
Day
72°F
W 20 mph
Precip.
64%
Night
72°F
W 17 mph
Precip.
27%
19.09
sat
Day
72°F
SW 17 mph
Precip.
23%
Night
70°F
W 13 mph
Precip.
9%
20.09
sun
Day
72°F
SW 12 mph
Precip.
4%
Night
68°F
SE 2 mph
Precip.
10%
21.09
mon
Day
75°F
SW 7 mph
Precip.
2%
Night
68°F
W 7 mph
Precip.
5%
22.09
tue
Day
73°F
SW 14 mph
Precip.
4%
Night
70°F
W 13 mph
Precip.
8%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 80.8°F. The highest and lowest sea temperatures during the month were 85.1°F and 77.0°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 84.4 °F
July 82.1 °F
September 77.7 °F
Warmest sea temp:
August 81.3 °F
September 77.5 °F
July 76.7 °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
13:04
Jeju
+73°F
SW 15 mph
Feels like: +77°F
Precip.: 24%
Places in South Korea:
Name
°F
Yongpyong
+72°F
Incheon
+79°F
Muju
+75°F
Busan
+77°F
Seoul
+79°F
Jeju
+73°F
24 Hours Forecast
Jeju
Local time: 13:04
September 16, wednesday
1500
75°F
SW
16 mph
1800
73°F
W
14 mph
2100
72°F
W
14 mph
September 17, thursday
0000
70°F
W
16 mph
0300
70°F
W
17 mph
0600
70°F
SW
17 mph
0900
72°F
SW
17 mph
1200
72°F
SW
19 mph
Units of measurement: °C / °F