On Saturday the 27th, the country will be mostly clear. With many inland areas seeing afternoon highs rise above 30 degrees, the heat is expected to set in in earnest.
According to the Korea Meteorological Administration, morning lows will range from 13 to 20 degrees, and afternoon highs from 24 to 32 degrees. For the time being, morning lows will be similar to or slightly lower than the average (lows 17 to 20 degrees, highs 24 to 29 degrees). Afternoon highs will be similar to or slightly higher than average.
Afternoon highs in major areas are expected to be 32 degrees in Seoul, 30 in Incheon, 30 in Chuncheon, 27 in Gangneung, 32 in Daejeon, 29 in Daegu, 31 in Jeonju, 31 in Gwangju, 27 in Busan, and 26 on Jeju.
The country will be mostly clear, but the southern regions and Jeju Island will have many clouds before clearing from late afternoon. Until around 9 a.m., some inland areas will see fog with visibility under 1 kilometer.
Fine dust concentrations are expected to be at "good" to "moderate" levels across all regions.
Waves will run 0.5 to 1.5 meters off the east and south coasts and 0.5 to 1.0 meters off the west coast. In the inner offshore waters, waves are expected to be 0.5 to 2.0 meters in the East Sea, 0.5 to 1.5 meters in the West Sea, and 0.5 to 2.5 meters in the South Sea. In the inner offshore waters of Jeju Island, the outer offshore waters of Jeju Island, and the outer offshore waters of the South Sea, winds will blow very strong at 30 to 60 kilometers per hour and waves will run very high at 1.5 to 3.5 meters until the morning of the day, so vessels navigating or operating should take caution.