Current sea water temperature:
+63.1°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: | 62.6°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| December 28 | 63.1°F | December 23 | 65.1°F |
| December 27 | 63.7°F | December 22 | 65.1°F |
| December 26 | 64.0°F | December 21 | 64.8°F |
| December 25 | 64.4°F | December 20 | 66.0°F |
| December 24 | 64.8°F | December 19 | 64.6°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
January
January
| Jeju |
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 08:58
December 29, monday
0900
48°F
NE
12 mph
12 mph
1200
57°F
E
17 mph
17 mph
1500
57°F
E
16 mph
16 mph
1800
54°F
E
12 mph
12 mph
2100
52°F
E
9 mph
9 mph
December 30, tuesday
0000
50°F
SE
7 mph
7 mph
0300
50°F
SE
9 mph
9 mph
0600
48°F
SE
9 mph
9 mph
