Recent Met Office forecasts indicate a maximum of 31–32°C for London on August 9, 2026, aligning with the market's heaviest weighting on those outcomes. A building high-pressure system and southerly advection of warmer air masses have driven a warming trend after cooler readings near 23°C on August 6. Clear skies and light winds are expected to enhance daytime heating under strong summer insolation, while ensemble guidance shows limited model spread around this range. Traders are pricing in modest uncertainty from potential small timing shifts in the ridge or localized cloud, keeping 30°C as a close second and capping probabilities for 33°C or higher. Updated model runs and official observations over the next 48 hours remain the key near-term catalysts.