Recent official forecasts from the Korea Meteorological Administration place Busan’s August 23 maximum near 31 °C under mostly cloudy skies and modest onshore flow, yet market-implied odds cluster on 33–34 °C because traders weigh the potential for brief clearing that would allow stronger daytime heating. Coastal sea breezes and high humidity typical of late-summer North Pacific High influence often cap peaks, while small differences in model timing of any weak frontal passage or reduced cloud cover can shift the daily high by 1–2 °C. With resolution only 48 hours away, updated KMA guidance and local mesoscale runs will likely tighten the distribution between the closely matched 33 °C and 34 °C outcomes.