Current sea water temperature:
+63.3°F
| Minimum sea water temperature in January: | 63.3°F |
| Maximum sea water temperature in January: | 55.2°F |
| Average sea water temperature in January: | 59.3°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| January 1 | 63.3°F | December 27 | 63.7°F |
| December 31 | 63.5°F | December 26 | 64.0°F |
| December 30 | 63.7°F | December 25 | 64.4°F |
| December 29 | 63.5°F | December 24 | 64.8°F |
| December 28 | 63.1°F | December 23 | 65.1°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: 18:09
January 01, thursday
2100
39°F
SE
19 mph
19 mph
January 02, friday
0000
37°F
SE
19 mph
19 mph
0300
37°F
SE
26 mph
26 mph
0600
34°F
SE
27 mph
27 mph
0900
36°F
SE
28 mph
28 mph
1200
37°F
SE
26 mph
26 mph
1500
37°F
SE
25 mph
25 mph
1800
37°F
SE
24 mph
24 mph
