World Resorts South Korea Incheon Weather

Incheon Sea Temperature in September

Average sea water temperature in September:
+75.5°F
Minimum sea water temperature in September: 82.6°F
Maximum sea water temperature in September: 69.6°F

Daily 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.

Monthly sea water temperature in Incheon, °F

Which South Korea resorts have warmest sea in September?

Place name September 2026 September 2025
Jeju 80.8°F 82.5°F
Busan 80.5°F 77.8°F
Incheon 78.7°F 78.3°F
Seoul 77.5°F 76.6°F
Yongpyong 75.6°F 76.5°F

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
13:31
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: 13:31
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