Official Korea Meteorological Administration guidance for August 13 projects a daytime maximum near 33 °C under mostly clear morning skies transitioning to increased afternoon cloud cover, with only a 20 % chance of light precipitation. Busan’s coastal setting introduces moderating sea breezes and elevated humidity that typically cap peaks 1–2 °C below inland values despite strong late-summer insolation. Ensemble model spreads reflect uncertainty in exact cloud timing and wind strength, producing the observed tight clustering of market-implied odds around 31–33 °C. Final hourly observations tomorrow will resolve the outcome; any unexpected clearing or delayed marine layer could push readings toward the low- to mid-30s.