Recent Met Office guidance highlights a post-heatwave cooling trend across southeast England, with high pressure building after thundery showers and fresher Atlantic air arriving by the weekend. Ensemble forecasts show daytime maxima for London on 16 August most likely between 23–27 °C, depending on the precise timing of cloud breaks and light winds; model spreads create genuine uncertainty around whether peak readings reach the mid- or upper-20s. Historical August climatology places the long-term average high near 22 °C, so current trader consensus clustering on 25–26 °C (combined ~50 % implied probability) reflects expectations of residual warmth under mostly sunny conditions rather than a return to the 30 °C+ values recorded earlier in the week. Updated model runs and Met Office briefings over the next 48 hours will be the key catalysts for any shifts in these market-implied odds.