Current Sea Water Temperature:
+88.0°F
| Maximum Sea Water Temperature in July: | 88.0°F |
| Minimum Sea Water Temperature in July: | 70.6°F |
| Average water temperature in July: | 79.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 28 | 88.0°F | July 23 | 83.6°F |
| July 27 | 87.6°F | July 22 | 82.6°F |
| July 26 | 87.2°F | July 21 | 82.8°F |
| July 25 | 86.8°F | July 20 | 82.0°F |
| July 24 | 85.4°F | July 19 | 83.0°F |
When is the Warmest Sea for Jeju?
According to our data for the last three years for Jeju the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Jeju was 87.3°F. The maximum and minimum values were 83.6°F and 89.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Jeju was 86.1°F. The maximum and minimum values were 81.0°F and 89.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Jeju was 80.5°F. The maximum and minimum values were 74.6°F and 88.0°F respectively.
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Jeju
Local time: 05:55
29 jul, wednesday
| 0600 |  |
82°F | E 9 mph |
| 0900 | |
86°F | SE 9 mph |
| 1200 | |
90°F | SE 9 mph |
| 1500 | |
90°F | SE 11 mph |
| 1800 | |
86°F | SE 9 mph |
| 2100 |  |
84°F | E 7 mph |
30 jul, thursday
| 0000 | |
84°F | E 9 mph |
| 0300 | |
84°F | E 10 mph |