Measurements:
°C
°F
CURRENT WEATHER
06:29
Incheon
70°F
W 13 mph
Feels like: 70°F
Precip: 13%
World Resorts South Korea Incheon Weather

7 Day Weather Forecast

09.09
wed
DAY
74°F
W 13 mph
precip
11%
NIGHT
68°F
W 8 mph
precip
7%
09.10
thu
DAY
78°F
W 6 mph
precip
1%
NIGHT
72°F
S 4 mph
precip
13%
09.11
fri
DAY
80°F
SE 3 mph
precip
10%
NIGHT
72°F
S 2 mph
precip
11%
09.12
sat
DAY
82°F
SE 6 mph
precip
9%
NIGHT
76°F
S 3 mph
precip
13%
09.13
sun
DAY
80°F
E 5 mph
precip
10%
NIGHT
74°F
S 4 mph
precip
14%
09.14
mon
DAY
78°F
SE 6 mph
precip
11%
NIGHT
74°F
S 2 mph
precip
12%
09.15
tue
DAY
80°F
E 5 mph
precip
9%
NIGHT
74°F
S 4 mph
precip
3%

Incheon Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Incheon was 25.7°F. The maximum and minimum values were 22.8°F and 28.0°F respectively.

Incheon on the Weather Map

Best Time to Visit Incheon
The most sunny months:
May 19 days
October 18 days
March 18 days
The most warm months:
August 88.0 °F
July 85.3 °F
September 81.7 °F
Warmest sea temperature:
August 82.5 °F
September 78.2 °F
July 77.6 °F
The most cold months:
January 31.8 °F
February 36.2 °F
December 36.6 °F
The most rainy months:
July 10 days
August 8 days
June 4 days
The most windy months:
December 11 mph
November 10 mph
January 10 mph
more details