Measurements:
°C
°F
Seoul
32°F
N 6 mph
Feels like: 26°F
Precip: 80%
World Resorts South Korea Seoul Weather

Seoul Sea Water Temperature

Current Sea Water Temperature:
+39.2°F
Maximum Sea Water Temperature in January: 44.0°F
Minimum Sea Water Temperature in January: 34.8°F
Average water temperature in January: 38.7°F

Sea Water Temperature for the Last 10 Days:

January 09 39.2°F January 04 40.4°F
January 08 39.2°F January 03 40.6°F
January 07 39.4°F January 02 40.6°F
January 06 39.6°F January 01 41.2°F
January 05 39.6°F December 31 41.4°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 30.9 °F
December 34.4 °F
February 36.9 °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 +40
Jeju +40
Muju +30
Seoul +32
Yongpyong +26
24 Hours Weather Forecast
Seoul
Local time: 22:08
10 jan, saturday
0000 38°F
NE
13 mph
0300 38°F
NE
16 mph
0600 38°F
E
16 mph
0900 36°F
E
18 mph
1200 38°F
E
21 mph
1500 34°F
E
21 mph
1800 28°F
E
17 mph
2100 24°F
SE
16 mph