Aurora tonight in Belfast

Can you see the aurora borealis from Belfast?

Belfast sits at magnetic latitude 54.6°N, just south of the auroral oval. The aurora is not an everyday sight here — but during moderate geomagnetic activity it regularly pushes south, and locals know that a forecast of Kp 5+ is worth stepping outside for.

The answer above is not a guess: it applies Belfast's Kp 6 visibility threshold to the live NOAA forecast, then checks whether the sky will actually cooperate — cloud cover hour by hour, moonlight, the astronomical darkness window, and how much city light you're competing with. When the factors conflict, you get an honest MAYBE or LOW with the limiting factor named, not an inflated promise.

When to look: the Belfast aurora season

The aurora season in Belfast runs from **September to late March**, when nights are long and dark. The weeks around the autumn and spring equinoxes (late September, late March) statistically deliver the strongest geomagnetic storms — a quirk of how Earth's tilted magnetic field interacts with the solar wind — so those windows are worth planning around.

Where to go in Belfast

Light pollution is a real constraint here: Belfast sits in Bortle class 7 skies. From the city centre, only the brightest displays (Kp 6+ with active substorms) punch through. Plan to drive 20–40 minutes toward darker surroundings, face north (or south in the southern hemisphere) from an unlit field, park, or coastline, and give your eyes 15–20 minutes to adapt.

Direction matters as much as darkness. The aurora sits over the magnetic northern horizon — roughly magnetic north in Belfast — so pick a spot with an open view that way. Check the "best window" time in tonight's answer above: it marks the first hour where cloud cover drops below ~40% while the sky is properly dark.

What Kp do you need in Belfast?

This table converts the abstract Kp index into what it actually means from Belfast, at magnetic latitude 54.6°:

One caution: Kp is a planetary average measured every 3 hours. A display can start and fade inside a single Kp interval, and short-lived bursts (substorms) can outperform the index. If tonight shows GO or MAYBE, it's worth checking the sky every 20–30 minutes rather than once.

How tonight's answer is calculated for Belfast

We combine five weighted factors — Kp vs Belfast's threshold (35%), night-average cloud cover (25%), moon illumination (15%), the astronomical darkness window (15%), and light pollution in Bortle class 7 (10%). The full method, data sources and known limitations are documented on our methodology page. No signup, no app, no tracking — the page computes everything in your browser directly from NOAA and Open-Meteo.