Current sea water temperature:
+79.7°F
| Minimum sea water temperature in September: | 85.6°F |
| Maximum sea water temperature in September: | 70.0°F |
| Average sea water temperature in September: | 77.6°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| September 15 | 79.7°F | September 10 | 81.0°F |
| September 14 | 77.5°F | September 9 | 81.5°F |
| September 13 | 77.0°F | September 8 | 81.0°F |
| September 12 | 77.5°F | September 7 | 79.7°F |
| September 11 | 79.3°F | September 6 | 79.5°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:
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.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 80.8°F. The highest and lowest sea temperatures during the month were 85.1°F and 77.0°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 78.3°F. The highest and lowest sea temperatures during the month were 86.0°F and 72.1°F.
current
weather
weather
| Jeju |
weather in
September
September
| Jeju |
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 13:04
September 16, wednesday
1500
75°F
SW
16 mph
16 mph
1800
73°F
W
14 mph
14 mph
2100
72°F
W
14 mph
14 mph
September 17, thursday
0000
70°F
W
16 mph
16 mph
0300
70°F
W
17 mph
17 mph
0600
70°F
SW
17 mph
17 mph
0900
72°F
SW
17 mph
17 mph
1200
72°F
SW
19 mph
19 mph
