Measurements:
°C
°F
Incheon
78°F
NW 9 mph
Feels like: 82°F
Precip: 27%
World Resorts South Korea Incheon Weather

Incheon Sea Water Temperature

Current Sea Water Temperature:
+80.0°F
Maximum Sea Water Temperature in July: 87.0°F
Minimum Sea Water Temperature in July: 68.0°F
Average water temperature in July: 77.4°F

Sea Water Temperature for the Last 10 Days:

July 04 80.0°F June 29 75.6°F
July 03 78.0°F June 28 75.2°F
July 02 76.8°F June 27 73.8°F
July 01 75.8°F June 26 72.8°F
June 30 75.8°F June 25 75.4°F

When is the Warmest Sea for Incheon?

According to our data for the last three years for Incheon the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Incheon was 85.5°F. The maximum and minimum values were 83.8°F and 87.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Incheon was 81.4°F. The maximum and minimum values were 75.6°F and 86.0°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Incheon was 81.4°F. The maximum and minimum values were 77.2°F and 87.0°F respectively.

Best Time to Visit Incheon
The most sunny months:
May 19 days
October 18 days
March 18 days
The most warm months:
August 88.2 °F
July 85.6 °F
September 81.7 °F
Warmest sea temperature:
August 82.3 °F
September 78.2 °F
July 77.4 °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

Incheon on the Weather Map

South Korea Resorts:
NAME
Busan +76
Incheon +78
Jeju +78
Muju +80
Seoul +84
Yongpyong +86
24 Hours Weather Forecast
Incheon
Local time: 11:39
05 jul, sunday
1200 78°F
NW
9 mph
1500 78°F
N
9 mph
1800 78°F
N
7 mph
2100 76°F
N
11 mph
06 jul, monday
0000 74°F
N
9 mph
0300 76°F
NW
9 mph
0600 76°F
NW
8 mph
0900 76°F
NW
9 mph