Recent ensemble forecasts from the Met Office and ECMWF point to a maximum of 23–24°C in London on August 19 under weakening high pressure, with partly cloudy skies, light variable winds, and limited Atlantic moisture moderating temperatures after earlier heat. Historical mid-August averages near 22°C provide context, while current model runs show tight clustering around these values amid a north-south UK split that favors milder southern conditions. Minor differences in cloud timing or urban heat retention could determine whether the peak reaches 24°C or stays at 23°C, with later model updates expected to refine the exact outcome before resolution.