Forecast models from the Korea Meteorological Administration and international sources indicate peak temperatures of 32–33°C in Busan on August 20, supported by the persistent influence of the North Pacific High delivering warm, humid subtropical air typical of late summer. Coastal sea breezes and variable afternoon cloud cover or isolated showers introduce uncertainty that narrows extremes, explaining the near-even market split between the 33°C and 32°C outcomes. Historical August climatology shows average daily maxima of 29–31°C, with recent short-term guidance showing limited day-to-day shifts in convective timing or marine moderation. Official observations recorded at the primary Busan station will determine resolution based on the verified daily maximum.