On Saturday the 12th, skies will be mostly clear nationwide, with a cool morning and a sharp rise in temperatures during the day, widening the day-to-night temperature gap to 10–15 degrees, mainly inland.
According to the Korea Meteorological Administration, the country will be mostly clear under the influence of a high-pressure system moving east from near China's Shandong Peninsula.
Morning lows are forecast at 12–20 degrees, with daytime highs at 25–30 degrees. For the time being, temperatures will be similar to the average (lows 15–21 degrees, highs 24–28 degrees), though morning temperatures in central regions and the southern interior will be slightly lower than average.
Forecast morning lows in major cities are 17 degrees in Seoul, 18 in Incheon, 13 in Chuncheon, 15 in Gangneung, 16 in Daejeon, 17 in Daegu, Jeonju, and Gwangju, 20 in Busan, and 23 in Jeju.
Daytime highs are expected to reach 28 degrees in Seoul, 26 in Incheon, 27 in Chuncheon, 26 in Gangneung and Daejeon, 28 in Daegu, Jeonju, Busan, and Jeju, and 30 in Gwangju.
Inland areas may see a day-to-night temperature gap widen to 10–15 degrees, so take care of your health and dress accordingly.
From early morning to morning, some parts of inland and mountainous Gangwon, inland South Jeolla, inland North Gyeongsang, and the western inland of South Gyeongsang will see fog with visibility under 1 kilometer.
In particular, roads near rivers, lakes, and valleys in inland areas may have denser fog than surrounding areas, so slow down and use caution for traffic safety when driving.
Fine dust levels are expected to be at a "good" level across all regions due to smooth atmospheric dispersion.
Waves will run 0.5–1.0 meters off the east and south coasts and 0.5 meters off the west coast. Offshore wave heights are expected at 0.5–1.5 meters in the East and West Seas, and 0.5–2.0 meters in the South Sea.
For the time being, the moon's gravitational pull will raise sea levels above normal, so be alert for flooding and sewer backflow in low-lying coastal areas at high tide.