On Sunday, the 18th, it is expected to be mostly cloudy nationwide. However, as time passes, it is expected to clear up.
Jeju Island is expected to be generally cloudy.
As of 5 a.m. on that day, the temperatures in major regions are as follows: Seoul 11.8 degrees, Incheon 10.9 degrees, Suwon 11.0 degrees, Chuncheon 11.1 degrees, Gangneung 17.1 degrees, Cheongju 13.5 degrees, Daejeon 12.4 degrees, Jeonju 12.7 degrees, Gwangju 12.8 degrees, Jeju 15.4 degrees, Daegu 16.4 degrees, Busan 16.6 degrees, Ulsan 17.3 degrees, and Changwon 16.0 degrees.
The highest daytime temperature is forecasted to be between 18 and 24 degrees.
The concentration of fine dust is expected to be at a 'good' to 'moderate' level nationwide due to smooth atmospheric diffusion.
The sea waves are expected to be 0.5 to 1.5 meters in the East and West Seas, and 0.5 to 1.0 meters in the South Sea.
The wave height in the inner offshore waters (about 200 km from the coast) is expected to be 0.5 to 2.5 meters in the East Sea and 0.5 to 1.5 meters in the West and South Seas.