Recent forecast model runs from sources including the Met Office and European ensembles point to a maximum of 26–28°C in Istanbul on August 30, with northerly to northeasterly winds advecting cooler maritime air and limiting daytime heating after scattered showers on the 28th–29th. Partly cloudy skies and dew points near 17–19°C further cap the peak, consistent with late-August climatology where highs average 27–29°C but often fall short under persistent northerly flow. Trader consensus reflected in the 47% implied probability on 26°C and 33.5% on 27°C aligns with this guidance, while the slim odds above 28°C account for uncertainty in final model runs and any last-minute clearing that could allow slightly stronger insolation. Updated official forecasts from the Turkish State Meteorological Service and NWP ensembles expected in the next 24–48 hours will refine these ranges ahead of market resolution.