Aurora Borealis in Vänersborg

Sweden · 58.38°, 12.32° · geomagnetic 58.0° · needs Kp 7

Tonight's aurora forecast for Vänersborg

40%

Peak chance of a visible display tonight, from the same model the Revon app runs. Vänersborg 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.

Tonight Tue 08 Sep
40%
18
20
22
00
02
04
06

Get the full 30-night forecast in Revon

Updated 2026-09-08 10:36 UTC

Local aurora guide for Vänersborg

Vänersborg is located at 58.0° geomagnetic latitude. Auroras are typically visible at this latitude during periods of high geomagnetic activity, specifically when the Kp index reaches 7 or higher.

Historically, Vänersborg has averaged approximately 2.4 nights per year with conditions suitable for aurora viewing, based on data spanning from 2016 to 2026.

The aurora viewing season in Vänersborg is primarily during the months of September, November, and March. These months offer a good balance of darkness and potential aurora activity.

During May, June, July, and August, the region experiences periods without full darkness, which can significantly reduce the visibility of auroral displays.

Vänersborg is situated in an area with a Bortle scale rating of 4, indicating a relatively dark sky. Areas with Bortle 4 conditions can be found approximately 14 km north-north-west of the town.

The surrounding terrain includes several notable features that may affect viewing. These include the headland of Lindekleven, the lake Hallsjön, the hill Halleberg, the bay Vänersborgsviken, and the island Kalvön.

Potential viewing locations near Vänersborg include Lindekleven, a headland situated 6.8 km east-north-east of the town. Hallsjön, a lake, is located 7.4 km east.

Other nearby geographical features include Halleberg, a hill 7.4 km east of Vänersborg, and Vänersborgsviken, a bay 8.0 km north-east.

Kalvön, an island, is situated 10.8 km west-north-west of Vänersborg.

Between 2016 and 2026, there were approximately 2.4 nights per year suitable for aurora viewing in Vänersborg. The historical record spans from April 2, 2016, to March 30, 2026.

Verified aurora reports within a 300 km radius of Vänersborg documented 20 sightings between January 1, 2015, and December 31, 2016.

Notable qualifying nights with high Kp values include 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 analysis of NOAA planetary Kp · Revon location dataset · 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 Vänersborg forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.

Get aurora alerts on iPhone

Nearby towns

Forecasts for places within reach of Vänersborg.