Current sea water temperature:
+77.4°F
| Minimum sea water temperature in July: | 84.0°F |
| Maximum sea water temperature in July: | 68.5°F |
| Average sea water temperature in July: | 76.5°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| July 17 | 77.4°F | July 12 | 76.8°F |
| July 16 | 77.4°F | July 11 | 76.3°F |
| July 15 | 77.9°F | July 10 | 75.0°F |
| July 14 | 77.0°F | July 9 | 74.7°F |
| July 13 | 77.2°F | July 8 | 75.0°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 75.1°F. The highest and lowest sea temperatures during the month were 77.9°F and 72.1°F.
current
weather
weather
| Jeju |
weather in
July
July
| Jeju |
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 22:19
July 18, saturday
0000
75°F
N
4 mph
4 mph
0300
75°F
N
4 mph
4 mph
0600
75°F
N
4 mph
4 mph
0900
84°F
NE
6 mph
6 mph
1200
86°F
NE
5 mph
5 mph
1500
88°F
NE
7 mph
7 mph
1800
84°F
NE
9 mph
9 mph
2100
77°F
NE
6 mph
6 mph
