Recent Korea Meteorological Administration short-range forecasts point to a daytime high near 28–29°C in Busan on May 18, sustained by a persistent high-pressure ridge and warm southerly flow that has elevated temperatures above typical mid-May climatology of 23–25°C. Coastal sea breezes at the Gimhae station resolution point introduce modest cooling potential that could keep the peak at 28°C if onshore winds strengthen, while predominantly clear skies would allow greater radiative heating toward 30°C. Ensemble model consensus remains tight, with small differences in timing of any cloud development or wind shifts likely determining the exact maximum; updated KMA guidance later today will provide the next key refinement for traders.