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Northern lights Brecon Beacons tonight

The Brecon Beacons is an International Dark Sky Reserve - one of the highest sky quality designations in the world. At ~52°N magnetic latitude, Kp 6-7 brings aurora within range of its Bortle 3 skies.

Aurora visibility — Brecon Beacons

Unlikely tonight

Kp 1 is well below the Kp 6-7 threshold needed for aurora to be visible from Brecon Beacons.

Current Kp

1

of 9

Threshold for Brecon Beacons: Kp 6-7 Magnetic latitude: ~52°N Updated: 10 May, 11:06 UTC

What Kp is needed here?

Brecon Beacons sits at a magnetic latitude of approximately 52°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 6-7 before the auroral oval expands far enough south to be visible from here.

At Kp 6-7, visibility is possible from Brecon Beacons but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Best dark sky sites near Brecon Beacons

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Brecon Beacons International Dark Sky Reserve

One of only a handful of International Dark Sky Reserves in the world. The reserve covers the entire national park and gives Bortle 3-4 conditions across a large area. The central Beacons around Libanus and Mynydd Illtyd Common are the most accessible areas within the reserve.

Mynydd Illtyd Common

Open moorland near Brecon town in the heart of the reserve. A broad flat common at around 300 m with open 360-degree sky. Popular starting point for aurora watches. Car parking available and very dark away from any settlement light.

Pen y Fan north face

The northern slopes of Pen y Fan face toward the Usk Valley and give an open north-facing horizon from high ground (886 m at the summit). The Storey Arms car park gives starting altitude for the approach.

Hay-on-Wye and the Black Mountains

The eastern Beacons around Hay Bluff and Twmpa (Lord Hereford's Knob) give the highest north-facing ridges in the area. The open escarpment above Hay-on-Wye faces north over the Wye Valley with Bortle 3 conditions.

Other UK aurora forecasts

UK overview Cardiff Wales overview Pembrokeshire

Related pages

Northern Lights UK

Live aurora forecast hub for all UK regions.

Northern Lights Wales Tonight

Wales-wide aurora forecast.

Northern Lights Cardiff Tonight

Cardiff is 40 minutes south of the Brecon Beacons.

Northern Lights Photography

The Beacons are one of the best aurora photography destinations in Wales.

What Is the Kp Index?

What Kp 6-7 means for the Brecon Beacons latitude.

Common questions

Aurora watching in the Brecon Beacons International Dark Sky Reserve.

Is the Brecon Beacons a good place for aurora watching?
Excellent. The Brecon Beacons is an International Dark Sky Reserve - one of the highest designations in the world - with Bortle 3 conditions across most of the park. The combination of high altitude, minimal light pollution, and accessible car parks makes it the best aurora site in south Wales and one of the best in England and Wales overall.
What Kp is needed for aurora in the Brecon Beacons?
Kp 6-7 from dark sites within the reserve. The park sits at ~52°N magnetic latitude, requiring a moderate geomagnetic storm. At Kp 7 a clear display with colour is typically visible; at Kp 8+ the aurora can be dramatic and overhead.
What is an International Dark Sky Reserve?
An International Dark Sky Reserve is the highest tier of dark sky designation, awarded by the International Dark-Sky Association to areas combining exceptional sky quality with strict light pollution controls. The Brecon Beacons received this status recognising its Bortle 3 skies and the commitment of local authorities and residents to maintaining them.
Where exactly should I go in the Brecon Beacons for aurora?
Mynydd Illtyd Common near Libanus is the most popular and accessible starting point - flat, open, dark, with parking. The Mountain Centre nearby has car parking and toilet facilities. For north-facing elevation, the Pen y Fan northern approach or the Black Mountains around Hay Bluff give the clearest northern horizon.
How far is the Brecon Beacons from Cardiff and Bristol?
About 40 minutes from Cardiff via the A470. Around 60-70 minutes from Bristol via the A449 and A40. Both are realistic evening trips during a Kp 7 forecast. The reserve is well sign-posted and the dark sky experience begins just a few kilometres inside the park boundary.