Recent forecasts for Jeddah on August 18 show daytime maxima clustered around 38–41°C, reflecting typical August conditions moderated by Red Sea breezes in a region where historical averages reach about 37–38°C. Trader consensus between the 39°C and 40°C+ outcomes stems from minor differences across meteorological models in peak temperature timing and wind effects, with some runs indicating 39°C under moderate northerly flow while others project brief spikes near 40–41°C amid clear skies and low humidity. Official agencies such as the Saudi National Center for Meteorology provide the authoritative observations that will resolve the market, and any late adjustments in steering patterns or sea-surface temperatures could shift the final reading.