**Trader sentiment for Busan's August 13 highest temperature clusters tightly around 31–33°C (23–30% each), reflecting short-range forecast consensus tempered by Busan’s coastal location.** Official Korea Meteorological Administration guidance indicates clear skies and a 34°C maximum under the influence of the North Pacific High, which sustains warm, humid southerly flow and ongoing heatwave conditions across southern Korea. However, multiple models and extended outlooks (including timeanddate and Met Office) point to 30–32°C, consistent with the moderating effect of sea breezes and relatively cooler Yellow Sea surface temperatures that frequently limit coastal peaks below inland values. Key differentiating factors include subtle variations in boundary-layer mixing, exact wind direction/speed (stronger onshore flow favors the lower end near 31°C), and any late-day cloud development that could shave 1–2°C off the peak. With the event only 48 hours away, model spread remains narrow; traders are pricing in the high probability of a mid-30s reading while discounting the chance of 34°C+ due to the well-documented urban-coastal gradient in Busan. Historical August averages near 29–31°C provide additional context, though the current anomalous warmth supports the market’s slight upward bias. Updated KMA and regional model runs expected in the next 24 hours will likely sharpen resolution.