Current sea water temperature:
+64.0°F
| Minimum sea water temperature in May: | 67.3°F |
| Maximum sea water temperature in May: | 57.6°F |
| Average sea water temperature in May: | 61.9°F |
| more information | |
14 days
forecast
forecast
| Jeju |
monthly
weather
weather
| Jeju |
Sea water temperature for the last 10 days:
| May 17 | 64.0°F | May 12 | 64.9°F |
| May 16 | 63.0°F | May 11 | 63.1°F |
| May 15 | 64.4°F | May 10 | 62.6°F |
| May 14 | 64.8°F | May 9 | 62.2°F |
| May 13 | 64.4°F | May 8 | 62.1°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
May
May
| Jeju |
Best time for vacation in Jeju
Jeju on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Jeju
Local time: 03:15
May 18, monday
0600
63°F
NW
4 mph
4 mph
0900
72°F
SE
4 mph
4 mph
1200
75°F
S
5 mph
5 mph
1500
77°F
S
5 mph
5 mph
1800
73°F
S
4 mph
4 mph
2100
68°F
N
4 mph
4 mph
May 19, tuesday
0000
66°F
NW
2 mph
2 mph
0300
64°F
N
4 mph
4 mph
