The weather in Jeju in August is very hot. The average temperatures are between 24°C and 28°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of August in Jeju. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Jeju in August 2026.
If you’re planning to visit Jeju in the near future, we highly recommend that you review the 14 day weather forecast for Jeju before you arrive.
Temperatures
28° / 24°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
277
mm
Sun Hours
9.9
Hrs
