Aurora Borealis in Västerås
Sweden · 59.62°, 16.55° · geomagnetic 58.5° · needs Kp 5
Tonight's aurora forecast for Västerås
48%
Peak chance of a visible display tonight, from the same model the Revon app runs. Västerås needs Kp 5 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 Västerås
Västerås is located at 58.5° geomagnetic latitude. Auroras are typically visible here when the planetary Kp index reaches 5.
On average, there are 21.2 nights per year suitable for aurora viewing in this region. The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Västerås are September, March, and October. During these months, the nights are dark enough to potentially see the aurora.
However, from May through August, there is no full darkness due to the high latitude, making aurora viewing impossible during these summer months.
Västerås experiences a Bortle scale rating of 8, indicating significant light pollution. Areas with Bortle 4 conditions are found 43 km north near Sala kommun, and Bortle 5 conditions are 19 km north-east near Västerås kommun.
Notable terrain features around Västerås include the Badelundaåsen ridge to the east, hills like Kävstaåsen and Åkestaåsen to the north-west, and lakes such as Mungasjön and Harsjön to the north and west respectively.
Geographic features near Västerås include Badelundaåsen, a ridge located 3.6 km to the east. Further north-west, Kävstaåsen and Åkestaåsen offer hill terrain.
To the north of Västerås lies Mungasjön lake, and to the west-north-west is Harsjön lake. These features provide varied local geography.
Between January 1, 2015, and December 31, 2016, there were 81 verified aurora reports within 300 km of Västerås.
The historical data includes qualifying nights such as March 24, 2026 (Kp 5.0), March 23, 2026 (Kp 5.0), March 22, 2026 (Kp 6.67), March 21, 2026 (Kp 6.0), and March 20, 2026 (Kp 7.0).
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
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Nearby towns
Forecasts for places within reach of Västerås.