Aurora Borealis in Märsta
Sweden · 59.62°, 17.85° · geomagnetic 58.3° · needs Kp 5
Tonight's aurora forecast for Märsta
45%
Peak chance of a visible display tonight, from the same model the Revon app runs. Märsta 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 Märsta
Märsta is located at 58.3° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 5 or higher.
With an average of 21.2 viable nights per year, patient observation may be rewarded.
The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Märsta are September, March, and October.
During May, June, July, and August, there is no full darkness, which can obscure aurora visibility.
Märsta experiences a Bortle 8 sky, indicating significant light pollution.
Darker skies, rated Bortle 4, can be found 26 km east-north-east near Norrtälje kommun.
Bortle 5 skies are available 16 km north-north-east near Knivsta kommun.
Stenbordshöjden, a hill located 5.1 km north-west of Märsta, offers a potential viewpoint.
Garnsviken, a bay situated 6.3 km west-north-west of Märsta, is another nearby geographic feature.
Svartsjön and Halmsjön are lakes located 7.0 km north and 7.0 km east-north-east of Märsta, respectively. Hovaberget, a hill, is 7.5 km north-north-west of Märsta.
There are 30 verified aurora reports within 300 km of Märsta between January 1, 2015, and December 31, 2016.
The historical data indicates an average of 21.2 viable nights per year for aurora viewing.
Notable qualifying nights with Kp 5.0 or higher occurred on March 20-24, 2026.
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 Märsta 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 Märsta.