If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Seogwipo: The hottest months are usually August and July, with an average temperature of 24°C, while the coldest months are January and February, with an average of 8°C. The rainiest months in Seogwipo are September, July, August and June, with each month seeing an average of 272 mm of rainfall.