Busan’s coastal location and maritime influence from the East Sea moderate daytime highs through sea breezes and higher humidity, keeping mid-June maxima typically within 1–2 °C of the long-term average of 25–26 °C. Current forecasts from AccuWeather and the Korea Meteorological Administration indicate June 15 highs centered on 25–28 °C under partly cloudy skies with light southerly flow and no strong high-pressure ridge or heat advection expected. This consensus places the 27–29 °C band as the most probable range, reflected in the market’s tight clustering around those outcomes. No recent model runs or observational updates have signaled deviations such as stronger onshore winds or clearer skies that would push temperatures notably higher or lower.