South Korea forecast: mild weekend with frosty mornings and windy coasts

South Korea is forecast to enjoy a milder spring weekend, but mornings will remain chilly. The Korea Meteorological Administration says Saturday, the 14th, will bring sunny to partly cloudy skies with daytime temperatures climbing to 10–15°C in many areas.

Across the country, morning lows are expected from -4 to 4°C, with daytime highs ranging from 10 to 15°C. In major cities, Seoul is projected to see about 3°C at dawn and 12°C by the afternoon, Incheon 3°C/10°C, Suwon 2°C/12°C, Gangneung 2°C/12°C, Daejeon 1°C/14°C, Sejong 0°C/13°C, Gwangju 1°C/15°C, Daegu 0°C/15°C, Ulsan 2°C/12°C, Busan 4°C/13°C, and Jeju 6°C/13°C.

Cloud cover is expected to be more widespread on the 14th, with some places in the southern inland experiencing frost during the pre-dawn hours. The diurnal swing—about 15 degrees Celsius from morning to afternoon—means you should dress in layers to cope with rapid changes in temperature.

Coastal and offshore conditions will be notably windy. Winds along the East Sea central and other East and South Sea routes are forecast at 30–60 kilometers per hour, bringing high waves that could affect beaches, coastal roads, and port operations. Mariners and coastal travelers are advised to monitor advisories and plan accordingly.

Fine dust levels are expected to be in the good to moderate range nationwide through the 14th, making outdoor activities more comfortable for residents and visitors alike.

Spring scenes are already drawing visitors. In Yangsan, south of Busan, plum blossoms have bloomed in Won-dong Plum Village following the traditional solar term for early spring. Another common early-season sight is the yellow blossoms of sansuyu in Gurye County, Jeollanam-do, which attract visitors and walkers as the season turns.

Why this matters beyond Korea: the transition to spring affects industries and travelers with ties to Korea, including the broader Asia-Pacific economy and U.S. supply chains. The mild but variable weather can influence energy demand, coastal shipping, and port throughput at major hubs like Busan and Incheon, which in turn affect the cost and timing of electronics and other goods that move from Korea to the United States. Seasonal bloom events also support tourism flows, some of which involve American travelers and travel providers. Finally, the continued winter-to-spring pattern and any associated weather risks—fog, frost, wind, and coastal waves—are relevant to U.S. manufacturers, insurers, and policymakers monitoring regional stability and resilience in supply chains and markets.