**Trader consensus heavily favors 28°C as the highest temperature in Busan on October 11, 2026, at 89% implied probability.** Current Korea Meteorological Administration observations show temperatures rising steadily through the morning and early afternoon under mostly cloudy skies, light easterly to northeasterly winds, and high pressure near 1018 hPa, with readings already reaching the mid- to upper-20s°C. Multiple forecast models align on a daily maximum around 25–27°C (78–80°F), reflecting typical mid-October conditions with moderate humidity and limited cloud cover allowing sufficient solar heating before any evening cooling. No significant frontal systems or precipitation are expected to suppress the peak, supporting the narrow spread around 28°C versus lower or higher outcomes. Updated model runs and official station data through the afternoon will provide the final resolution inputs.