Aurora Borealis in Roskilde
Denmark · 55.64°, 12.08° · geomagnetic 55.4° · needs Kp 7
Tonight's aurora forecast for Roskilde
5%
Peak chance of a visible display tonight, from the same model the Revon app runs. Roskilde needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.8. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Roskilde
Roskilde is located at 55.4° geomagnetic latitude. Auroras visible here typically require a Kp of 7 or higher.
On average, there are about 2.5 nights per year with conditions suitable for aurora viewing in this region.
The historical record for aurora sightings in this area spans from April 2, 2016, to March 30, 2026.
The months of September, November, and August offer the best opportunities for aurora viewing in Roskilde.
During May, June, and July, there is no full darkness, which impacts visibility.
Roskilde experiences a Bortle 6 sky, indicating moderate light pollution.
Areas with darker skies, such as near Holbæk Municipality (Bortle 4), are located about 24 km west-north-west.
Notable features around Roskilde include Masterhøj hill to the north-east, Store Kattinge Sø lake to the west-north-west, Kattinge Vig bay to the north-west, Elleore island to the north-north-west, and Kærlingbjerg hill to the north-east.
Masterhøj is a hill located 3.5 km north-east of Roskilde.
Store Kattinge Sø, a lake, is situated 4.7 km west-north-west of Roskilde.
Kattinge Vig is a bay 5.0 km north-west of Roskilde, and Elleore island is 5.0 km north-north-west of the city. Kærlingbjerg, another hill, is 6.4 km north-east of Roskilde.
There have been 6 verified aurora reports within 300 km of Roskilde between January 1, 2015, and December 31, 2016.
The period from 2016 to 2026 includes several nights with significant geomagnetic activity, such as March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), January 19, 2026 (Kp 8.67), November 12, 2025 (Kp 7.33), and November 11, 2025 (Kp 8.67).
Sources: Revon location dataset · 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
Know when it is worth going outside
Revon watches the Roskilde forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Nearby towns
Forecasts for places within reach of Roskilde.