World Resorts South Korea Incheon Weather

Incheon 7 Days Forecast

16.09
wed
Day
79°F
W 2 mph
Precip.
0%
Night
72°F
NW 3 mph
Precip.
1%
17.09
thu
Day
79°F
W 6 mph
Precip.
9%
Night
72°F
W 5 mph
Precip.
12%
18.09
fri
Day
79°F
W 10 mph
Precip.
8%
Night
70°F
W 7 mph
Precip.
3%
19.09
sat
Day
79°F
W 8 mph
Precip.
1%
Night
72°F
W 6 mph
Precip.
2%
20.09
sun
Day
79°F
SE 4 mph
Precip.
10%
Night
72°F
S 4 mph
Precip.
4%
21.09
mon
Day
81°F
S 2 mph
Precip.
1%
Night
73°F
S 2 mph
Precip.
3%
22.09
tue
Day
82°F
NW 6 mph
Precip.
9%
Night
73°F
N 3 mph
Precip.
3%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 78.7°F. The highest and lowest sea temperatures during the month were 80.8°F and 76.3°F.

Air temperature in Incheon, °F

Precipitation total in Incheon, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Incheon

Sunniest months:
May 19 days
October 18 days
March 18 days
Warmest months:
August 84.2 °F
July 81.8 °F
September 78.6 °F
Warmest sea temp:
August 79.2 °F
September 75.4 °F
July 74.8 °F
Coldest months:
January 33.6 °F
February 37.6 °F
December 38.0 °F
Rainiest months:
July 10 days
August 8 days
June 4 days
Windiest months:
December 11.1 mph
November 10.3 mph
January 10.3 mph

Incheon on a weather map

Current weather
13:04
Incheon
+79°F
W 2 mph
Feels like: +77°F
Precip.: 0%
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
Incheon
Local time: 13:04
September 16, wednesday
1500
82°F
E
3 mph
1800
77°F
E
6 mph
2100
75°F
S
2 mph
September 17, thursday
0000
72°F
NW
3 mph
0300
70°F
W
3 mph
0600
68°F
W
3 mph
0900
72°F
W
4 mph
1200
79°F
W
6 mph
Units of measurement: °C / °F