Aurora Borealis in Arnold
United Kingdom · 53.00°, -1.13° · geomagnetic 55.0° · needs Kp 7
Tonight's aurora forecast for Arnold
3%
Peak chance of a visible display tonight, from the same model the Revon app runs. Arnold needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.9. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:36 UTC
Local aurora guide for Arnold
Auroras are visible at Arnold when the geomagnetic activity reaches Kp 7 or higher. This level of activity is expected to occur approximately 2.7 times per year.
At 55.0° geomagnetic latitude, Arnold is well-positioned for aurora viewing. However, the frequency of visible auroras depends on geomagnetic activity, not just latitude.
The best months for aurora viewing in Arnold are September, August, and November. These months offer a good balance of darkness and potential aurora activity.
During June and July, Arnold experiences periods without full darkness, which can significantly reduce the chances of seeing the aurora, even if activity is high.
Arnold is situated in an area with Bortle 7 light pollution. While this indicates significant artificial light, darker skies can be found nearby.
Areas with Bortle 4 skies are located 96 km east-north-east near East Lindsey, and Bortle 5 skies are 51 km east-south-east near South Kesteven.
The horizon to the north-north-east is marked by Ramsdale Hill and Loath Hill. To the south, the horizon includes Barton Island and Rushcliffe Country Park.
Features that may affect viewing include Ramsdale Hill, a hill located 3.7 km north-north-east of Arnold, and Loath Hill, another hill 10.1 km north-north-east.
Further afield, Newark Island is situated 22.1 km east-north-east, and Barton Island is 12.6 km south-south-west.
Rushcliffe Country Park is a park located 13.1 km south of Arnold.
Between 2016 and 2026, there were an average of 2.7 nights per year with sufficient geomagnetic activity for auroras to be potentially visible in Arnold.
Historical records show verified sightings in the wider region, with 103 reports logged between 2015 and 2016.
Notable qualifying nights within the record span include 2026-03-20 (Kp 7.0), 2026-01-20 (Kp 7.67), 2026-01-19 (Kp 8.67), 2025-11-12 (Kp 7.33), and 2025-11-11 (Kp 8.67).
Sources: Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · GeoNames (CC BY 4.0) · Aurorasaurus verified positive reports
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