16.09
wed
wed
Day
79°F
W 4 mph
Precip.
0%
0%
Night
70°F
W 3 mph
Precip.
1%
1%
17.09
thu
thu
Day
77°F
W 6 mph
Precip.
9%
9%
Night
70°F
W 4 mph
Precip.
13%
13%
18.09
fri
fri
Day
79°F
W 9 mph
Precip.
7%
7%
Night
68°F
SW 6 mph
Precip.
4%
4%
19.09
sat
sat
Day
79°F
W 8 mph
Precip.
1%
1%
Night
68°F
W 4 mph
Precip.
3%
3%
20.09
sun
sun
Day
79°F
SW 3 mph
Precip.
10%
10%
Night
72°F
SW 2 mph
Precip.
3%
3%
21.09
mon
mon
Day
82°F
SW 2 mph
Precip.
1%
1%
Night
73°F
SW 2 mph
Precip.
3%
3%
22.09
tue
tue
Day
82°F
W 6 mph
Precip.
9%
9%
Night
73°F
N 2 mph
Precip.
2%
2%
23.09
wed
wed
Day
81°F
NE 6 mph
Precip.
1%
1%
Night
72°F
E 2 mph
Precip.
8%
8%
24.09
thu
thu
Day
81°F
SE 3 mph
Precip.
11%
11%
Night
72°F
SW 2 mph
Precip.
4%
4%
25.09
fri
fri
Day
82°F
NW 4 mph
Precip.
10%
10%
Night
73°F
NE 4 mph
Precip.
13%
13%
26.09
sat
sat
Day
66°F
NW 7 mph
Precip.
87%
87%
Night
68°F
SE 4 mph
Precip.
80%
80%
27.09
sun
sun
Day
70°F
SW 8 mph
Precip.
5%
5%
Night
61°F
SW 6 mph
Precip.
11%
11%
28.09
mon
mon
Day
66°F
W 7 mph
Precip.
13%
13%
Night
64°F
W 4 mph
Precip.
16%
16%
29.09
tue
tue
Day
61°F
W 4 mph
Precip.
61%
61%
Night
59°F
E 3 mph
Precip.
28%
28%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 77.5°F. The highest and lowest sea temperatures during the month were 79.7°F and 75.0°F.
Air temperature in Seoul, °F
Precipitation total in Seoul, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Seoul
Seoul on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Seoul
Local time: 11:53
September 16, wednesday
1200
79°F
W
4 mph
4 mph
1500
82°F
W
4 mph
4 mph
1800
79°F
N
2 mph
2 mph
2100
73°F
S
1 mph
1 mph
September 17, thursday
0000
70°F
W
3 mph
3 mph
0300
66°F
W
3 mph
3 mph
0600
64°F
W
4 mph
4 mph
0900
70°F
W
4 mph
4 mph
