Current sea water temperature:
+66.0°F
| Minimum sea water temperature in December: | 67.6°F |
| Maximum sea water temperature in December: | 59.2°F |
| Average sea water temperature in December: | 62.5°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| December 20 | 66.0°F | December 15 | 64.8°F |
| December 19 | 64.6°F | December 14 | 65.3°F |
| December 18 | 64.6°F | December 13 | 65.5°F |
| December 17 | 63.5°F | December 12 | 64.6°F |
| December 16 | 63.7°F | December 11 | 64.9°F |
Monthly sea water temperature, °F
When is the warmest sea in Jeju?
Based on the data about daily sea water temperature for the last three years the warmest sea in Jeju was noticed in August, September and July.
Monthly Sea Temperatures in Jeju, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 83.6°F. The highest and lowest sea temperatures during the month were 85.6°F and 80.2°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 82.5°F. The highest and lowest sea temperatures during the month were 85.6°F and 77.9°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 80.2°F. The highest and lowest sea temperatures during the month were 83.5°F and 73.6°F.
current
weather
weather
| Jeju |
weather in
December
December
| Jeju |
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 19:46
December 20, saturday
2100
57°F
SE
11 mph
11 mph
December 21, sunday
0000
52°F
SE
17 mph
17 mph
0300
48°F
SE
22 mph
22 mph
0600
46°F
S
21 mph
21 mph
0900
45°F
S
21 mph
21 mph
1200
45°F
S
21 mph
21 mph
1500
45°F
S
19 mph
19 mph
1800
43°F
S
17 mph
17 mph
