Recent short-range forecasts from the Korea Meteorological Administration and ensemble models indicate daytime highs in Busan on June 16, 2026, most likely in the 27–29°C range, with cloud cover and moderate southwesterly flow limiting peak heating. Sea surface temperatures in the Korea Strait near seasonal norms and the early East Asian monsoon pattern support this consensus, while variable low-level moisture and timing of any weak frontal boundary create the narrow spread among leading outcomes. Historical June climatology shows average maxima near 26°C, so current model runs reflect slightly above-normal conditions driven by recent clear-sky episodes. Updated KMA guidance and afternoon model runs on June 15 will be the key data points for traders, as small shifts in predicted insolation or wind mixing can decide between the closely matched 28°C and 29°C contracts.