Recent official forecasts from multiple models indicate a cooling trend for Istanbul on August 28, with daytime highs likely peaking near 24–27°C amid northerly winds and scattered showers. This shift stems from a change in synoptic flow, with cooler maritime air advecting from the north, increased cloud cover, and potential convective activity that limits solar heating and caps maximum temperatures below recent values near 30°C. Model consensus points to resolution in the middle temperature bins, though small variations in timing of any frontal passage or wind speed could differentiate outcomes around 25–26°C. Traders weigh these near-term NHC-style guidance updates against typical late-August climatology, where highs average 28–29°C.