Aurora Borealis in Tuusula
Finland · 60.40°, 25.03° · geomagnetic 57.9° · needs Kp 7
Tonight's aurora forecast for Tuusula
28%
Peak chance of a visible display tonight, from the same model the Revon app runs. Tuusula needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.7. 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 Tuusula
Tuusula is located at 57.9° geomagnetic latitude. Auroras visible here typically require a Kp index of 7 or higher.
On average, there are about 2.3 nights per year with conditions suitable for aurora viewing in this region. The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Tuusula are September, November, and March. These months offer a good balance of darkness and potential aurora activity.
However, during May, June, July, and August, there is insufficient darkness for aurora viewing due to the high latitude.
Tuusula experiences a Bortle 7 sky, indicating significant light pollution. For darker skies, Bortle 4 conditions can be found about 60 km south-east near Porvoo, and Bortle 5 skies are available around 28 km east-north-east near Askola.
Nearby terrain features include hills like Niininiemi and Raiskiomäki, lakes such as Rusutjärvi and Tuusulanjärvi, and the Lemmenlaakso Luonnonsuojelualue reserve to the north-east of Tuusula.
Niininiemi is a hill located 3.5 km north-east of Tuusula. Raiskiomäki, another hill, is situated 3.5 km north of the town.
The lake Rusutjärvi is 3.6 km north-west of Tuusula, and Tuusulanjärvi is a lake 4.5 km north-north-east of the town.
Further afield, the Lemmenlaakso Luonnonsuojelualue reserve is located 10.8 km north-east of Tuusula.
Between January 1, 2015, and December 31, 2016, there were 40 verified aurora reports within 300 km of Tuusula.
Notable qualifying nights in the historical record 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 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 Tuusula 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 Tuusula.