Swimming in Jeju Island (Jejudo) in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Jeju Island (Jejudo) in september 2025.
In september, according to seasonal norms, the sea temperature in Jeju Island (Jejudo) is:
Minimum: 74°F
Average: 77°F
Maximum: 80°F
Other useful seasonal weather averages in september:
- Outside temperature: 71°F to 77°F
- Most common weather: "Clear/Sunny"
- The wind blows at 13.7mph
- It rains a total of 11.3in, over 8 day(s).
Should we swim in Jeju Island (Jejudo) in september?
Yes! The water temperature in Jeju Island (Jejudo) in september is pleasant
Swimming in september is pleasant in Jeju Island (Jejudo) and the surrounding area. The sea temperature is 77°F on average (min/max: 74°F/80°F), allowing you to swim for a long time and enjoy water sports.
Note also that in september, the climate is tolerable with an average outside temperature of 74°F, 11.2in of precipitation (over 8 days) and 81.25 % humidity.
Water and normal seasonal temperatures in Jeju Island (Jejudo) in september
| September | |||
| Average sea temperature | 77°F | ||
| Minimum sea temperature | 74°F | ||
| Maximum sea temperature | 80°F | ||
| Average outside temperature | 76°F | ||
| Maximum outside temperature | 77°F | ||
| Minimum outside temperature | 72°F | ||
| Wind speed | 14.9mph | ||
| Wind temperature | 72°F | ||
| Precipitation | 11.3in | ||
| Number of days of rain | 8 jour(s) (28%) | ||
| Humidity | 82% | ||
| Visibility in kilometers | 9.36km | ||
| Cloud cover | 46% | ||
| Our opinion | pleasant swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Jeju Island (Jejudo)
Swim elsewhere in South Korea in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Busan in september | 77°F | 81°F | pleasant swimming | Gangneung in september | 72°F | 77°F | pleasant swimming | Incheon in september | 72°F | 75°F | pleasant swimming | Pohang in september | 75°F | 79°F | pleasant swimming | Sokcho in september | 71°F | 76°F | pleasant swimming |