**Current forecasts from the Korea Meteorological Administration and ensemble models indicate overnight lows near 25–26°C for Busan on August 25 under mostly clear skies and light winds, supporting the near-even market-implied odds (44% each) for those exact minima.** Stable high-pressure conditions and minimal cloud cover are enabling efficient radiative cooling after sunset, while the coastal marine influence and moderate humidity limit further drops below historical August averages of roughly 24°C. Light southwesterly winds (3–6 mph) reduce mixing, keeping the boundary layer stable and allowing temperatures to settle close to the dew point. Minor model differences in exact wind speed or residual moisture explain the tight spread between 25°C and 26°C outcomes; stronger onshore flow or any unexpected low-level clouds could nudge the minimum slightly higher, while clearer, calmer conditions would favor the lower end. Updated KMA guidance and short-range model runs over the next 48 hours will be the key data points for traders.