Forecast models from the UK Met Office and European agencies converge on a daytime maximum of 27°C for London on August 15 under mostly sunny intervals and light northerly winds, following a 34°C peak the previous day. This positions 27°C as the modal outcome, with 26°C and 28°C close behind, reflecting typical uncertainty ranges in high-resolution numerical weather prediction. A ridge of high pressure has maintained stable conditions with minimal cloud cover, maximizing solar insolation while the post-heatwave advection of cooler maritime air limits further warming. Historical August baselines (roughly 21–22°C) make this well above average, yet the tight clustering of probabilities around 26–28°C aligns with ensemble spread rather than outlier scenarios. Traders are closely monitoring the next model runs and real-time observations for any late adjustments to the maximum.