Northern Lights Forecast for Belfast

Only during a geomagnetic storm. In the strongest storms hundreds of people have climbed Divis and Black Mountain for it, and photos have come in from west Belfast and from Crawfordsburn on the lough. On a normal night nothing shows through the city lights. Your two quick options are the Belfast Hills, which put you above the glow, and the south shore of Belfast Lough around Helen's Bay, which faces north across the water.

It can be: in the strongest storms the aurora has been photographed over the Causeway. The whole stretch has open sea to the north: Ballycastle with Pans Rocks at the end of its beach, Whitepark Bay, Dunluce Castle and Portstewart Strand. Ballycastle is 55 miles from Belfast, so allow about an hour and a half each way.

It is in Davagh Forest in the Sperrin Mountains of County Tyrone, beyond Cookstown, which is 47 miles west of Belfast. It became Northern Ireland's first International Dark Sky Park in 2020. The skies are far darker than anything near the city, though the park is inland, so for the aurora the north coast still gives the cleaner horizon.

Yes. Helen's Bay station is on the Belfast to Bangor line, and the beach at Crawfordsburn Country Park faces north across Belfast Lough with the Antrim shore opposite. It is about 10 miles from the city. The north coast and Davagh Forest need a car.

The nights in Belfast are dark almost all year. But the aurora rarely reaches this far south: only in strong storms, which can come in any month. The longest nights, around 21 December, have about 14 hours of darkness.

Mostly yes. Apart from a few nights around midsummer the nights in Belfast get dark, so the aurora can show in summer too when it reaches this far south.

In Belfast, you usually need at least Kp 5 to have a reasonable chance of seeing the northern lights. Lower Kp can still bring a faint aurora display low on the northern horizon, but it is less common.

This is based on magnetic latitude, and Kp index is a global geomagnetic index, so treat it as a rule of thumb, not a location-specific guarantee.

Tonight, the NOAA Kp index forecast is 1.3 to 1.7. That is below the usual Kp index threshold for Belfast, so seeing the aurora is unlikely.