Current forecasts from the Korea Meteorological Administration and global models point to a high near 32–33°C for Seoul and Incheon on August 12 amid an ongoing regional heatwave driven by persistent high pressure, easterly flow descending off the peninsula's mountains, and residual effects from nearby typhoon circulation. These conditions favor clear to partly cloudy skies with strong daytime insolation and limited mixing, while typical mid-August humidity near 70–80% amplifies perceived heat but has minimal direct impact on maximum air temperature. Ensemble guidance shows tight clustering around these values, with modest spread arising from small timing differences in any weak frontal passage or cloud cover. Historical climatology places average August highs near 30–31°C, so the current pattern reflects above-normal persistence that traders are pricing into the closely bunched 31–34°C outcomes.