Measurements:
°C
°F
Seoul
36°F
NE 3 mph
Feels like: 32°F
Precip: 0%
World Resorts South Korea Seoul Weather

Seoul Sea Water Temperature

Current Sea Water Temperature:
+40.2°F
Maximum Sea Water Temperature in March: 47.2°F
Minimum Sea Water Temperature in March: 34.8°F
Average water temperature in March: 40.1°F

Sea Water Temperature for the Last 10 Days:

March 09 40.2°F March 04 38.8°F
March 08 40.2°F March 03 39.4°F
March 07 40.2°F March 02 39.0°F
March 06 39.4°F March 01 37.8°F
March 05 39.4°F February 28 38.2°F

When is the Warmest Sea for Seoul?

According to our data for the last three years for Seoul 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 Seoul was 84.2°F. The maximum and minimum values were 81.6°F and 86.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Seoul was 79.6°F. The maximum and minimum values were 74.6°F and 84.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Seoul was 81.2°F. The maximum and minimum values were 76.0°F and 85.8°F respectively.

Best Time to Visit Seoul
The most sunny months:
May 19 days
October 18 days
March 17 days
The most warm months:
August 91.1 °F
July 89.9 °F
June 85.7 °F
Warmest sea temperature:
August 81.9 °F
September 77.6 °F
July 77.4 °F
The most cold months:
January 30.6 °F
December 34.4 °F
February 37.0 °F
The most rainy months:
July 11 days
August 8 days
June 5 days
The most windy months:
April 7 mph
March 7 mph
May 6 mph

Seoul on the Weather Map

South Korea Resorts:
NAME
Busan +40
Incheon +36
Jeju +40
Muju +36
Seoul +36
Yongpyong +28
24 Hours Weather Forecast
Seoul
Local time: 10:13
10 mar, tuesday
1200 42°F
NE
6 mph
1500 46°F
E
9 mph
1800 42°F
E
8 mph
2100 38°F
E
3 mph
11 mar, wednesday
0000 36°F
E
2 mph
0300 36°F
E
1 mph
0600 36°F
S
0 mph
0900 38°F
NW
1 mph