Aurora Borealis in Vallentuna
Sweden · 59.53°, 18.08° · geomagnetic 58.1° · needs Kp 5
Tonight's aurora forecast for Vallentuna
43%
Peak chance of a visible display tonight, from the same model the Revon app runs. Vallentuna 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 Vallentuna
Auroras are typically visible in Vallentuna when the geomagnetic activity reaches Kp 5 or higher. This level of activity is associated with a geomagnetic latitude of 58.1°.
On average, there are about 21.2 nights per year suitable for aurora viewing in this region. These opportunities are spread across the period from early 2016 to late 2026.
The months of September, March, and October offer the best opportunities for aurora viewing in Vallentuna. During these months, the nights are dark enough to potentially see the aurora.
Conversely, the period from May through August experiences no full darkness, making aurora sightings during these summer months unlikely.
Vallentuna is situated in an area with a Bortle scale rating of 7, indicating significant light pollution. However, darker skies, rated Bortle 4, can be found approximately 26 km north-northeast near Norrtälje kommun.
Further dark sky opportunities exist about 24 km east near Österåkers kommun, with a Bortle rating of 5.
Local terrain features include Storsjön lake 4.2 km north-northeast, Lillsjön lake 5.9 km north-northeast, and Benhamraberget hill 12.1 km north-east.
Geographic features near Vallentuna include Storsjön, a lake located 4.2 km to the north-northeast. Lillsjön, another lake, is situated 5.9 km to the north-northeast.
Further afield, Benhamraberget, a hill, is located 12.1 km to the north-east. Steningeviken, a bay, can be found 16.7 km to the west-northwest, and Flottviken, a lighthouse, is 18.9 km to the west-northwest.
There have been 30 verified aurora reports within 300 km of Vallentuna between January 2015 and December 2016.
The historical data indicates that nights with Kp 5.0 or higher occurred on March 20, 21, 22, 23, and 24, 2026, with Kp values ranging from 5.0 to 7.0.
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 Vallentuna 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 Vallentuna.