Aurora tonight in London

Can you see the aurora borealis from London?

London is well outside the normal aurora zone, so a display here requires a genuinely strong geomagnetic storm — which is exactly why the sightings that do happen make the news.

London needs Kp 7 — a G3 storm — and even then you are working against one of the largest light domes on the planet. The aurora here is a deep-red glow low over the northern horizon, frequently invisible in photographs taken from the centre and obvious from countryside twenty miles out. It is genuinely rare and genuinely spectacular when it happens.

Country

United Kingdom

Magnetic latitude

51.5°N

Geographic latitude

51.51°

Aurora threshold

Kp 7

Light pollution

Bortle 9

Deep-dark nights / yr

298

Sun at solar midnight

61.9° below horizon

Midnight sun

none

When to look: the London aurora season

The dates worth planning around at London are **25 Jul** to **18 May**. Inside that run the sun clears 18° below the horizon on 298 nights and the sky is dark enough for a faint arc to register; outside it you are relying on twilight and luck. The counter-season is just as clearly defined: from about **19 May** to **24 Jul** (67 nights) the sun never gets 18° below the horizon, so the sky never reaches full darkness, though the sky stays dark enough in the early hours that a bright display is still worth looking for.

The nights here do get genuinely dark — the sun bottoms out 61.9° below the horizon in midwinter. But for roughly 19 May to 24 Jul it never gets that low, and the sky stays too bright for anything but the strongest displays. The season is therefore defined by dark nights, not by calendar dates.

Where to go in London

The northern edge of the city, out toward the Chilterns and the open country beyond the M25, is the realistic option: you need both distance from the light and an unobstructed northern horizon.

Face north. Auroral light comes from the oval that rings the magnetic pole, and from London that ring lies to the north — so a rooftop, a treeline or a bright shopfront on that side costs you the display no matter how good the forecast is. As for timing, the "best window" figure near the top is the first hour where cloud sits below about 40% during this latitude's darkness.

What Kp do you need in London?

Kp is a planetary number, and the only way to read it usefully is against this city's own threshold. For London that threshold is Kp 7, set by a magnetic latitude of 51.5°:

At Bortle class 9, London's own light is the biggest single obstacle between the forecast and what you actually see. A Kp 7 night that shows beautifully from open country shows as nothing from a lit street. When the verdict above is GO or MAYBE, budget the drive out of town into the evening.

How tonight's answer is calculated for London

Tonight's verdict for London weights five inputs: the live Kp forecast measured against this city's own Kp 7 threshold (35%), night-average cloud cover at 51.51°, -0.13° (25%), moon illumination (15%), the astronomical darkness window computed for this latitude (15%), and light pollution at Bortle class 9 (10%). The method, its data sources and its known limitations are documented on our methodology page. No signup, no app, no account — the page computes everything in your browser from NOAA and Open-Meteo directly. Anonymous analytics and Google's advertising script are the only third parties involved, and both are set out on our privacy page.