Aurora Borealis in Bromma
Sweden · 59.34°, 17.94° · geomagnetic 58.0° · needs Kp 7
Tonight's aurora forecast for Bromma
40%
Peak chance of a visible display tonight, from the same model the Revon app runs. Bromma 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 10:36 UTC
Local aurora guide for Bromma
Bromma is located at 58.0° geomagnetic latitude. Auroras visible at this latitude typically require a Kp index of 7 or higher.
On average, there are about 2.4 nights per year in Bromma where the aurora may be visible.
Records of aurora visibility in this region span from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Bromma are September, November, and March.
During May, June, July, and August, there is no full darkness, which can impact viewing conditions.
Bromma experiences Bortle 8 light pollution. Areas with Bortle 4 conditions are located 47 km east-south-east near Värmdö kommun, and Bortle 5 conditions are 36 km east-north-east near Österåkers kommun.
The horizon to the east is characterized by Karlbergs Slottspark, a park 4.6 km away. To the east-north-east, there is Bockholmen, an island 7.6 km away. To the north-east, Brunnsviken, a lake, is 6.3 km away. Kaninholmen, an island, is 7.4 km to the north-north-east. Vasaparken, a park, is 5.9 km to the east.
Karlbergs Slottspark is a park located 4.6 km east of Bromma.
Vasaparken is a park situated 5.9 km east of Bromma.
Brunnsviken is a lake located 6.3 km north-east of Bromma. Kaninholmen, an island, is 7.4 km north-north-east of Bromma. Bockholmen is an island located 7.6 km east-north-east of Bromma.
There have been 30 verified aurora reports within 300 km of Bromma between January 1, 2015, and December 31, 2016.
The historical record indicates that nights with potential aurora visibility, based on Kp index, occurred on 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 Bromma 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 Bromma.