Official forecasts from the Met Office and BBC Weather currently indicate a high of 25°C for London on August 7 under mostly sunny conditions with light westerly winds, while some models and sites project 26°C amid a gradual warming trend from high-pressure building. Ensemble model spreads and local factors such as urban heat island effects, variable cloud cover, and precise measurement sites like Heathrow explain the tight 25–26°C split in trader sentiment, with both outcomes near 37–40% implied probability. Historical August averages near 22–23°C provide context for the elevated readings, though short-range uncertainty in boundary-layer mixing keeps 24°C or 27°C as plausible tails. Updated model runs and afternoon observations will refine these probabilities ahead of resolution.