Official Met Office guidance currently projects a London daytime maximum of 28°C on August 17 under partly cloudy conditions with a risk of light afternoon showers, following the recent heat spike that produced peaks near 34–38°C earlier in the week. This places the highest probability on 26–27°C outcomes as traders weigh reduced solar insolation from increased cloud cover, a shift toward more westerly flow advecting milder air, and potential boundary-layer mixing against lingering warm advection. Model consensus shows modest spread around these values, with any delays in shower development or clearer spells able to push readings toward 28°C while earlier or heavier cloud would favor 25°C. Historical August maxima near 22°C provide context, but current high-pressure influence keeps readings above average. Updated model runs and Met Office briefings tomorrow morning represent the next key data points for refining exact peak temperatures at official stations.