Measurements:
°C
°F
Jeju
74°F
SW 11 mph
Feels like: 74°F
Precip: 22%
World Resorts South Korea Jeju Weather

14 Day Weather Forecast

09.09
wed
DAY
76°F
W 17 mph
precip
14%
NIGHT
72°F
W 21 mph
precip
13%
09.10
thu
DAY
74°F
SW 21 mph
precip
13%
NIGHT
72°F
W 16 mph
precip
8%
09.11
fri
DAY
78°F
SW 14 mph
precip
3%
NIGHT
74°F
W 12 mph
precip
10%
09.12
sat
DAY
76°F
W 12 mph
precip
26%
NIGHT
76°F
SW 9 mph
precip
72%
09.13
sun
DAY
76°F
SW 10 mph
precip
76%
NIGHT
74°F
S 4 mph
precip
20%
09.14
mon
DAY
80°F
S 6 mph
precip
8%
NIGHT
76°F
SW 4 mph
precip
12%
09.15
tue
DAY
74°F
SW 9 mph
precip
41%
NIGHT
74°F
W 7 mph
precip
21%
09.16
wed
DAY
76°F
W 15 mph
precip
26%
NIGHT
74°F
W 14 mph
precip
20%
09.17
thu
DAY
78°F
SW 17 mph
precip
15%
NIGHT
68°F
SW 17 mph
precip
7%
09.18
fri
DAY
72°F
SW 16 mph
precip
4%
NIGHT
70°F
SW 13 mph
precip
20%
09.19
sat
DAY
74°F
SW 12 mph
precip
5%
NIGHT
68°F
S 3 mph
precip
7%
09.20
sun
DAY
76°F
SW 13 mph
precip
5%
NIGHT
70°F
SW 15 mph
precip
5%
09.21
mon
DAY
74°F
SW 17 mph
precip
18%
NIGHT
72°F
SW 9 mph
precip
30%
09.22
tue
DAY
74°F
SW 11 mph
precip
7%
NIGHT
70°F
W 5 mph
precip
5%

Jeju Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Jeju was 86.1°F. The maximum and minimum values were 81.0°F and 89.6°F respectively.

Jeju on the Weather Map

Best Time to Visit Jeju
The most sunny months:
May 15 days
October 14 days
April 14 days
The most warm months:
August 88.3 °F
July 85.7 °F
September 80.8 °F
Warmest sea temperature:
August 84.8 °F
September 80.5 °F
July 79.6 °F
The most cold months:
January 44.2 °F
February 45.9 °F
December 48.5 °F
The most rainy months:
August 8 days
September 7 days
July 7 days
The most windy months:
January 14 mph
December 14 mph
February 14 mph
South Korea Resorts:
NAME
Busan +76
Incheon +70
Jeju +74
Muju +62
Seoul +68
Yongpyong +58
24 Hours Weather Forecast
Jeju
Local time: 05:27
09 sep, wednesday
0600 74°F
SW
11 mph
0900 74°F
W
18 mph
1200 76°F
W
17 mph
1500 76°F
W
20 mph
1800 76°F
W
21 mph
2100 74°F
W
21 mph
10 sep, thursday
0000 72°F
W
21 mph
0300 70°F
SW
21 mph