Northern lights Cornwall tonight
Cornwall at ~50°N magnetic latitude needs a G2-G3 storm (Kp 6-7) for aurora to reach its skies. The Atlantic-facing north coast and Bodmin Moor Dark Sky Landscape are the best positions. During the G5 storm of May 2024, aurora was photographed across the county.
Aurora visibility - Cornwall
Unlikely tonight
Kp 1 is well below the Kp 6–7 threshold needed for aurora to be visible from Cornwall.
Current Kp
1
of 9
7-day outlook for Cornwall
Today
21 May
Tomorrow
22 May
Sat
23 May
Sun
24 May
Mon
25 May
Tue
26 May
Wed
27 May
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
What Kp is needed here?
Cornwall sits at a magnetic latitude of approximately 50°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 Cornwall 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 Cornwall
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Bodmin Moor Dark Sky Landscape
Get directions ↗Bodmin Moor holds status as a Dark Sky Landscape - a formal recognition of its exceptional sky conditions. The elevated granite plateau in central Cornwall sits above coastal cloud inversions on many nights, giving reliable clear sky when the coasts are covered. Brown Willy and Rough Tor - the two highest points - give north-facing moorland positions with no artificial light for several kilometres. Bortle 3 conditions are consistent across the higher moor, and the area is accessible from the A30 without long walks. During the G5 storm of May 2024, aurora was photographed from Bodmin Moor.
Cape Cornwall and the north coast near St Just
Get directions ↗Cape Cornwall at the far south-western tip is one of the few capes in England that actually faces north at its headland end, giving a direct Atlantic horizon with no land obstruction for hundreds of miles. The surrounding area near St Just is among the darkest in England - Bortle 2 conditions with minimal settlement lighting in the far west. During major events, aurora photographed from here appears over the Atlantic Ocean with the coastal cliff foreground. The approach road is narrow but manageable; park at Cape Cornwall and walk the coast path for the best horizon positions.
Carnewas and Bedruthan Steps
Get directions ↗The north Cornwall coast between Newquay and Padstow gives a north-facing Atlantic horizon with sea stacks and cliff foregrounds. Carnewas, above Bedruthan Steps, provides a National Trust car park with access to the cliff top. The surrounding farmland is low-density and well-lit only near Newquay itself. At 10 km from Newquay, sky brightness drops to Bortle 3. The cliff-top position faces directly north across the Atlantic, making it one of the better horizon positions in north Cornwall for low aurora arcs during G3+ storms.
Best time to see the northern lights in Cornwall
At 50°N magnetic latitude, Cornwall 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 Cornwall'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.
Related pages
Northern Lights UK
Live aurora forecast hub for all UK regions.
Northern Lights Devon Tonight
Devon aurora forecast - Dartmoor Dark Sky Reserve.
Northern Lights Exmoor Tonight
Exmoor Dark Sky Reserve - better positioned than Cornwall.
Northern Lights Viewing Tips
How to make the most of a storm forecast from southern England.
What Is the Kp Index?
How Kp 6-7 determines visibility at 50°N magnetic latitude.
Common questions
Aurora watching in Cornwall - what storms reach here, the best sites, and how often it happens.