Recent heatwave conditions across South Korea, with record highs exceeding 40°C in early August, have elevated overnight minima in the Seoul-Incheon region through sustained high pressure, clear skies, and reduced radiative cooling. Official Korea Meteorological Administration guidance and ensemble models indicate the August 8 low will likely settle near 26–28°C, with urban heat-island effects and light winds limiting further drops. The tight clustering of market-implied odds around 27°C versus 28°C reflects minor divergences among forecast runs on exact timing of any late-day cloud increases or marine air influence from the Yellow Sea, while lower-probability outcomes below 25°C would require an unforecasted frontal passage before resolution.