Northern lights in Brecon Beacons tonight
South Wales · 52° magnetic latitude · Kp 6-7 threshold
Kp 1 is well below the Kp 6-7 threshold needed for aurora to be visible from Brecon Beacons.
7-day outlook for Brecon Beacons
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
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
Get directions ↗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
Get directions ↗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 dark away from any settlement light.
Pen y Fan north face
Get directions ↗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
Get directions ↗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.
Best time to see the northern lights in Brecon Beacons
At 52°N magnetic latitude, Brecon Beacons sits at the lower end of regular aurora territory. Only the deep mid-winter months of November through January offer nights dark enough for aurora to be visible, and only then when a significant geomagnetic storm pushes the auroral oval this far south.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Brecon Beacons's latitude.
Outside November through January, twilight is too bright for aurora viewing even during significant storms. The season is short, but the equinox months on either side of winter can extend it slightly when storm timing aligns.
Up to 8 locations
How often does the aurora appear in Brecon Beacons?
Average nights per month the Kp reached Brecon Beacons's threshold of 6+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 6+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Brecon Beacons
Best window
The January to March window averages 1 aurora nights - the strongest consecutive stretch of the year.
How long to stay
Aurora at this latitude requires patience - allow as many nights as possible during March.
Related pages
Northern Lights UK
Live aurora forecast hub for all UK regions.
Read →Northern Lights Wales Tonight
Wales-wide aurora forecast.
Read →Northern Lights Cardiff Tonight
Cardiff is 40 minutes south of the Brecon Beacons.
Read →Northern Lights Photography
The Beacons are one of the best aurora photography destinations in Wales.
Read →What Is the Kp Index?
What Kp 6-7 means for the Brecon Beacons latitude.
Read →Aurora photographs from Brecon Beacons
Real photos sourced from Wikimedia Commons.
Aurora over Brecon Beacons 
Aurora over Brecon Beacons 
Aurora over Brecon Beacons 
Aurora over Brecon Beacons 
Aurora over Brecon Beacons 
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