Recent official forecasts from the Korea Meteorological Administration indicate a maximum of 34°C for Busan on August 10 under partly cloudy skies and light winds, yet trader consensus clusters tightly on 30–31°C amid model spread. Key differentiating factors include Busan’s coastal marine layer moderating afternoon heating via sea breezes, variable cloud cover reducing insolation, and potential for scattered convection that caps peak temperatures below drier-model runs. Historical August climatology averages near 29–30°C, with high humidity amplifying heat indices but not always daily maxima; small shifts in boundary-layer moisture or timing of any onshore flow can readily swing the observed high between these narrow bins as new model guidance arrives before resolution.