Forecast models from sources including the Met Office, Weather Atlas, and Yr.no indicate a likely daily maximum of 37–39°C for Jeddah on August 29 under persistent sunny, dry conditions typical of late-summer Red Sea coastal climatology, with light westerly winds and minimal cloud cover supporting strong daytime insolation. Recent August observations show peaks near or above 38–39°C amid stable high pressure, aligning with the near-even market split between 38°C and 39°C-or-higher outcomes. Key differentiators include slight variations in peak-hour timing, boundary-layer humidity (often 50%+), and local sea-breeze effects that can suppress or enhance the afternoon maximum by 1–2°C; ensemble spread remains modest given the absence of synoptic disturbances.