Ongoing heatwave conditions over South Korea, sustained by a strong North Pacific subtropical high advecting warm, moist southerly flow, form the main driver behind trader consensus clustering on 35–37°C for Busan’s August 3 maximum. Coastal proximity to the East Sea introduces marine moderation via potential afternoon sea breezes and boundary-layer mixing, which can cap peaks below inland values, while variable cloud cover or scattered showers tied to residual monsoon moisture adds forecast uncertainty. Ensemble model spreads in subsidence strength and exact timing of any breeze differentiate the closely matched leading outcomes, with historical August baselines around 30–32°C underscoring the anomalous warmth. Updated KMA guidance and diurnal temperature trends through the weekend will refine probabilities ahead of resolution.