Aurora Borealis in Korsholm

Finland · 63.11°, 21.68° · geomagnetic 61.0° · needs Kp 5

Tonight's aurora forecast for Korsholm

47%

Peak chance of a visible display tonight, from the same model the Revon app runs. Korsholm needs Kp 5 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.

Tonight Tue 08 Sep
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Korsholm

Korsholm is located at 61.0° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 5 or higher.

On average, there are about 18.9 nights per year in this region where conditions are suitable for aurora viewing.

Records show suitable viewing conditions have been observed between April 2016 and March 2026.

The best months for aurora viewing in Korsholm are September, March, and October.

During April, May, June, July, and August, there is no full darkness, which can impact viewing opportunities.

Korsholm has a Bortle scale rating of 6, indicating moderate light pollution.

Areas with darker skies, rated Bortle 3, can be found approximately 15 km north-north-east of Korsholm.

The horizon is characterized by features such as the Infjärden lake to the west-north-west, hills like Maraholmen and Rågrinden to the north-west and east-north-east respectively, and islands like Pissmörgrund and Dollisgrund to the north-east.

Geographic features near Korsholm include the Infjärden lake, located 3.0 km west-north-west.

To the north-north-west, 3.6 km away, is Maraholmen, a hill.

Further east-north-east, Rågrinden is a hill 3.7 km from Korsholm, while islands such as Pissmörgrund and Dollisgrund are situated 4.1 km and 4.2 km north-north-east, respectively.

There have been 147 verified aurora reports within 300 km of Korsholm between January 2015 and December 2016.

The period from April 2016 to March 2026 has recorded several nights with Kp values of 5.0 or higher, indicating potential aurora visibility.

Specific qualifying nights include March 24, 23, 22, 21, and 20, 2026, with Kp values ranging from 5.0 to 7.0.

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 Korsholm forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.

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Nearby towns

Forecasts for places within reach of Korsholm.