World Resorts South Korea Jeju Weather

Jeju Sea Temperature in August

Average sea water temperature in August:
+81.3°F
Minimum sea water temperature in August: 86.5°F
Maximum sea water temperature in August: 73.6°F

Daily sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 82.4°F. The highest and lowest sea temperatures during the month were 85.8°F and 79.0°F.

Monthly sea water temperature in Jeju, °F

Which South Korea resorts have warmest sea in August?

Place name August 2026 August 2025
Jeju 82.4°F 83.6°F
Incheon 82.1°F 82.0°F
Busan 81.6°F 80.6°F
Seoul 81.1°F 80.8°F
Yongpyong 78.9°F 78.7°F

Best time for vacation in Jeju

Sunniest months:
May 15 days
October 14 days
April 14 days
Warmest months:
August 84.4 °F
July 82.1 °F
September 77.5 °F
Warmest sea temp:
August 81.3 °F
September 77.6 °F
July 76.7 °F
Coldest months:
January 44.8 °F
February 46.3 °F
December 48.6 °F
Rainiest months:
August 8 days
July 7 days
September 6 days
Windiest months:
January 14.4 mph
December 14.1 mph
February 13.9 mph

Jeju on a weather map

Current weather
23:07
Jeju
+63°F
S 9 mph
Feels like: +63°F
Precip.: 3%
Places in South Korea:
Name
°F
Yongpyong
+52°F
Incheon
+63°F
Muju
+46°F
Busan
+66°F
Seoul
+63°F
Jeju
+63°F
24 Hours Forecast
Jeju
Local time: 23:07
October 07, wednesday
0000
63°F
S
9 mph
0300
61°F
S
9 mph
0600
61°F
S
7 mph
0900
66°F
S
7 mph
1200
70°F
S
8 mph
1500
70°F
S
8 mph
1800
66°F
S
7 mph
2100
64°F
S
5 mph
Units of measurement: °C / °F