Forecast models from agencies tracking the Red Sea region show Jeddah's August 11 high likely peaking between 38–41°C under persistent subtropical high pressure and light northerly winds, producing mostly sunny skies with limited daytime cloud cover. Coastal sea breezes from the Red Sea introduce the main uncertainty, as stronger onshore flow could cap the maximum near 38°C while weaker circulation allows inland heating toward 41°C. Historical August averages near 38°C and current early-month readings around 35°C anchor trader consensus, with model ensemble spreads explaining the tight clustering of implied probabilities around those four outcomes. Updated runs from the next 48 hours will likely sharpen resolution.