Short-range forecasts from agencies including the Korea Meteorological Administration indicate overnight lows in Seoul and Incheon on August 4 will most likely settle near 27°C, driven by persistent summer heat, elevated dew points, and limited nocturnal radiative cooling amid high humidity and urban heat-island effects. Recent model runs show minimal cooling from any passing weak fronts, consistent with the ongoing heatwave that produced record daytime highs and tropical-night minima above 25°C in late July and early August. Trader consensus around 27°C (61.5%) and adjacent 26–28°C outcomes reflects tight clustering in ensemble guidance, with lower probabilities assigned to outliers that would require an unexpected surge in onshore flow or clearer skies for enhanced cooling. Updated KMA briefings and model consensus through August 3 remain the key near-term catalysts.