**Trader consensus centers on 39–41°C as the most likely range for Jeddah’s highest temperature on August 11, 2026, with 40°C holding the highest implied probability at 39.5%.** Jeddah’s Red Sea coastal location typically moderates peak heat through sea breezes and humidity, yet August remains the seasonal maximum with strong solar insolation and minimal cloud cover expected under the current sunny forecast. The National Center for Meteorology (NCM) has projected above-normal temperatures for the western region, including up to 2.5°C above average in parts of Makkah province, supporting the market’s tilt toward the upper end of typical August maxima (historically 37–39°C). Recent days have seen highs near 39°C amid partly cloudy conditions and active winds, while extended forecasts for August 11 indicate around 38°C (101°F) under clear skies—close enough to resolution thresholds that small shifts in wind timing or afternoon heating could push the daily maximum into the 39–41°C band. Limited model divergence and proximity to the observation window keep the market tightly clustered around these values rather than extremes.