Latest numerical weather prediction models from the Met Office and ECMWF consensus indicate a mild overnight minimum near 18°C for London on August 26, driven by a southerly airflow advecting warmer air masses under increasing cloud cover that limits radiative cooling. Surface observations from recent days show temperatures holding above seasonal averages due to weak pressure gradients and minimal wind shear, reducing the likelihood of sharp drops. Ensemble spreads highlight modest uncertainty from potential timing shifts in any incoming frontal systems, though historical August climatology supports lows rarely falling below 15°C without stronger northerly outbreaks. Updated model runs and real-time buoy data expected overnight will refine resolution criteria based on official London station readings.