# Extreme weather patterns in South Korea

> Live situation record from CLSTR: https://clstr.news/situations/extreme-weather-patterns-in-south-korea
> Updated: 2026-08-11T03:09:30.000Z. Sources: 6. Developments: 2.

South Korea has transitioned from a period of extreme heat to more moderate, though still warm, conditions. Initially, the country faced record-breaking heatwaves, with temperatures in Seoul reaching 40.2°C. This heat was accompanied by heavy rainfall along the eastern coast and Jeju Island, driven by moisture from Typhoon Dolphin.

By mid-August, the extreme heatwave warnings were lifted as overnight temperatures began to drop. Major cities saw an end to prolonged streaks of ‘tropical nights’—periods where temperatures remained at or above 25°C overnight—with Busan ending a 23-day streak and Seoul ending a 17-day streak. While daytime highs remain significant, reaching up to 33°C in several regions, morning lows have decreased. Weather patterns continue to be influenced by tropical systems, with moisture from Typhoon Chan-hom expected to affect rainfall along the east coast.

## Timeline

### 2026-08-11: South Korea sees relief from extreme heat as overnight temperatures drop

South Korea is seeing relief from extreme heat as overnight temperatures drop, ending long streaks of tropical nights in cities like Busan and Seoul, despite continued daytime warmth.

2 sources. https://clstr.news/cluster/south-korea-sees-relief-from-extreme-heat-as-overnight-temperatures-drop

### 2026-08-08: South Korea weather shifts from record heat to heavy eastern rainfall

Extreme heat in South Korea is subsiding as heavy rainfall impacts the east coast and Jeju Island, driven by moisture from the East Sea and the influence of Typhoon Dolphin.

5 sources. https://clstr.news/cluster/south-korea-sees-record-heat-ease-as-heavy-rain-hits-east-coast

---
Cite as: Extreme weather patterns in South Korea. CLSTR, https://clstr.news/situations/extreme-weather-patterns-in-south-korea