South Korea Faces Worsening Air Quality and Coastal Swells, Officials Warn

A weather forecast carried by Yonhap News Agency’s Yonhap TV warns that starting tomorrow, air quality in South Korea will worsen as pollutants generated domestically combine with ultrafine particles carried in from the northwest. The central regions are expected to remain under “bad” air conditions for the entire day, with haze spreading nationwide in the afternoon. Authorities urge people to wear masks outdoors.

Tomorrow, Sunday, is expected to be cloudy across the country. Inland areas may see drizzle or light snow flurries, while western regions could experience fog until morning and visibility in the Gangwon mountains may be reduced in the afternoon. Typical spring temperature fluctuations are expected, with mornings still chilly and daytime highs around 15°C.

For major cities, the forecast calls for cold starts and milder afternoons: Seoul and Daegu around 4°C at dawn, with daytime temperatures near 13°C; Gwangju around 3°C in the morning and roughly 13°C by midday; Busan around 15°C in the afternoon.

Through the next couple of days, strong swells are expected to roll onto the East Sea and the Jeju coast, a ballast for coastal weather and potentially for fishing and shipping activity along those shores.

On Wednesday, rain is anticipated in the Chungcheong region and southern areas, including Jeju. The mix of precipitation, wind and changing temperatures continues to define this spring period across the peninsula.

Why this matters to U.S. readers: South Korea is a key player in the global tech supply chain, home to major semiconductor and electronics manufacturers, with important port hubs such as Busan and Incheon that handle shipments to and from the United States. Air quality and weather disruptions can affect worker health, factory operations, and logistics, potentially impacting product availability and prices in global markets.

The forecast also highlights ongoing air-quality challenges tied to both domestic emissions and cross-border pollution, a factor in regional environmental policy and health advisories. For readers traveling to or doing business in Korea, monitoring local air quality updates and coastal weather alerts remains prudent, given the potential for rapid changes in conditions and coastal swells.