Short-range forecast guidance from models such as those referenced by the UK Met Office and timeanddate.com, combined with typical August climatology for Jeddah’s Red Sea coastal setting, positions 40–41 °C as the most probable peak temperature range on August 12. Strong solar insolation under stable high-pressure conditions, light northerly winds, minimal cloud cover, and the absence of dust outbreaks or enhanced sea-breeze suppression allow afternoon maxima to build above the long-term average of 37–38 °C. Recent early-August observations of 35–37 °C and current readings near 42 °C reinforce trader consensus, reflected in the 59.5 % market-implied probability for 41 °C or higher. Updated model runs ahead of resolution will determine whether slight cooling from marine influence or further warming materializes.