Aurora Borealis in Gamla Uppsala
Sweden · 59.90°, 17.63° · geomagnetic 58.6° · needs Kp 5
Tonight's aurora forecast for Gamla Uppsala
49%
Peak chance of a visible display tonight, from the same model the Revon app runs. Gamla Uppsala 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 Gamla Uppsala
Gamla Uppsala is at a geomagnetic latitude of 58.6 degrees.
Auroras are typically visible when the Kp index reaches 5.
On average, there are 20.8 nights per year suitable for aurora viewing.
The best months for aurora viewing in Gamla Uppsala are September, March, and October.
During May, June, July, and August, there is no full darkness.
The area around Gamla Uppsala has a Bortle scale rating of 4.
Dark sky areas, rated Bortle 4, are found 13 km north-north-east near Uppsala kommun.
The horizon is characterized by hills, lakes, and bays in various directions.
Forsa, a hill, is located 11.4 km north of Gamla Uppsala.
Brattbacken, another hill, is 17.1 km north of Gamla Uppsala.
Långsjön lake is 17.3 km north-west of Gamla Uppsala, and Ovansjön lake is 19.0 km east-north-east.
Between 2016 and 2026, there were 20.8 viable aurora nights per year.
The period from 2016-04-02 to 2026-03-30 has been analyzed for aurora activity.
Notable qualifying nights include March 20-24, 2026, with Kp values ranging from 5.0 to 7.0.
Sources: 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)
Know when it is worth going outside
Revon watches the Gamla Uppsala 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 Gamla Uppsala.