Every autumn, Londoners get a quiet warning that winter is on the way: the final sunset of the year at or after 6pm. In 2026 that moment arrives in late October, just before the clocks go back and British Summer Time ends on Sunday 25 October.
Here's how it works. Through early and mid-October, the sun keeps sinking earlier each evening — by around 6pm at the start of the month, then creeping closer to 5:45pm as the weeks pass. The real gut-punch comes when BST ends and clocks fall back an hour overnight. Sunset suddenly lands before 4:30pm in London, and by December it's dark not long after 3:45pm. That one-hour shift is the difference between an after-work stroll along the South Bank and a commute that happens entirely in the dark.
So the last 6pm sunset is a small milestone worth noticing. If you want to mark it, London has no shortage of good sunset spots: Primrose Hill and Parliament Hill for skyline views, Greenwich Park for the Thames snaking east, the Sky Garden (free, but book ahead) for a city-high vantage, or simply Westminster Bridge when the light turns gold behind Big Ben.
After the change, evenings aren't all doom. Early darkness has its perks — Christmas lights along Regent and Oxford Street, ice rinks at Somerset House and the Natural History Museum, and pubs that feel extra cosy by 5pm. But if you're the type who plans your day around daylight, the second half of October is your window: aim outdoor plans before roughly 5:30pm from late October through winter.
Travellers planning a London trip should build this into their itinerary. Visit in late October and you still get a proper evening — sunset around 6pm, dinner in the light, maybe a rooftop drink. Come in November or December and you'll want to front-load sightseeing into the shorter daylight hours and save museums, markets and covered attractions for after dark. It's also worth noting that sunrise shifts too: it's gloomy until around 7am after the clocks change.
Whether you're local or visiting, the takeaway is simple: enjoy the long evenings while they last, because London's 6pm sunsets are packing up for the year.
