The Met Office long-range forecast suggests there is a chance of late-season hot spells or a heatwave in London in September. The indication points to potentially higher temperatures compared with typical conditions for the time of year, though it does not confirm a specific event.
The available reporting focuses on the same forecast message, with one outlet describing the signal as a “strong indication” of a heatwave risk. The coverage does not provide further detail on temperatures, timing, or whether other parts of the UK are affected, and does not cite agreed figures for any threshold that would formally define a heatwave.
As with longer-range outlooks, the forecast is subject to uncertainty and is best read as a likelihood of warmer conditions rather than a guarantee. Additional updates from the Met Office would typically be needed as September approaches to refine the outlook and assess timing and intensity.
