A proper late-summer Sunday in Barnes: sunny skies and 25°C
6 September 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
After a week that has edged steadily warmer, Barnes gets a genuinely fine Sunday today — the Met Office is forecasting sunshine, a high of 25°C and a low of 17°C overnight, with just a 6% chance of rain and a UV index of 5 (moderate, so sun cream is worth it if you're spending time outdoors).
That puts today a notch above the 22°C that characterised the earlier part of this fine spell, and well into the kind of September afternoon that makes the towpath, the wetlands and Barnes Green look their best. The river tends to be busy on days like this, so if you're heading to the Thames foreshore or the Leg O'Mutton reserve, an earlier start helps.
UV index 5 means that fair-skinned adults and children can start to burn after about 30 minutes of unprotected exposure, so hats and SPF are sensible precautions for the afternoon hours between noon and 3pm.
The overnight low of 17°C is mild enough that an evening in a pub garden or on a terrace remains comfortable well into the night. Full forecast from the Met Office.