Measurements:
°C
°F
Seoul
84°F
E 7 mph
Feels like: 86°F
Precip: 3%
World Resorts South Korea Seoul Weather

Seoul Sea Water Temperature

Current Sea Water Temperature:
+73.2°F
Maximum Sea Water Temperature in June: 76.8°F
Minimum Sea Water Temperature in June: 59.4°F
Average water temperature in June: 69.5°F

Sea Water Temperature for the Last 10 Days:

June 21 73.2°F June 16 73.2°F
June 20 74.0°F June 15 72.0°F
June 19 75.6°F June 14 71.6°F
June 18 73.4°F June 13 70.2°F
June 17 73.8°F June 12 69.4°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 30.6 °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 +72
Incheon +76
Jeju +76
Muju +82
Seoul +84
Yongpyong +64
24 Hours Weather Forecast
Seoul
Local time: 18:42
21 jun, sunday
2100 78°F
E
4 mph
22 jun, monday
0000 76°F
SE
1 mph
0300 74°F
S
1 mph
0600 74°F
W
2 mph
0900 78°F
W
2 mph
1200 84°F
NW
1 mph
1500 86°F
E
4 mph
1800 84°F
E
4 mph