World Resorts South Korea Seoul Weather

Seoul Sea Temperature in December

Average sea water temperature in December:
+46.8°F
Minimum sea water temperature in December: 54.0°F
Maximum sea water temperature in December: 41.5°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 46.9°F. The highest and lowest sea temperatures during the month were 51.6°F and 42.3°F.

Monthly sea water temperature in Seoul, °F

Which South Korea resorts have warmest sea in December?

Place name December 2025 December 2024
Jeju 65.1°F 62.8°F
Busan 60.6°F 58.9°F
Yongpyong 56.9°F 56.0°F
Seoul 46.9°F 46.2°F
Incheon 46.5°F 45.5°F

Best time for vacation in Seoul

Sunniest months:
May 19 days
October 18 days
March 17 days
Warmest months:
August 87.0 °F
July 85.9 °F
June 82.2 °F
Warmest sea temp:
August 78.7 °F
September 74.9 °F
July 74.7 °F
Coldest months:
January 32.6 °F
December 36.0 °F
February 38.3 °F
Rainiest months:
July 11 days
August 8 days
June 5 days
Windiest months:
April 7.1 mph
March 7.1 mph
May 6.5 mph

Seoul on a weather map

Current weather
03:19
Seoul
+64°F
W 2 mph
Feels like: +64°F
Precip.: 0%
Places in South Korea:
Name
°F
Yongpyong
+61°F
Incheon
+64°F
Muju
+55°F
Busan
+63°F
Seoul
+64°F
Jeju
+63°F
24 Hours Forecast
Seoul
Local time: 03:19
May 18, monday
0600
64°F
W
2 mph
0900
75°F
NW
2 mph
1200
84°F
NE
6 mph
1500
84°F
E
9 mph
1800
79°F
E
8 mph
2100
73°F
E
2 mph
May 19, tuesday
0000
72°F
NE
2 mph
0300
70°F
N
1 mph
Units of measurement: °C / °F