Aurora Borealis in Turku

Finland · 60.45°, 22.27° · geomagnetic 58.4° · needs Kp 5

Tonight's aurora forecast for Turku

44%

Peak chance of a visible display tonight, from the same model the Revon app runs. Turku 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
44%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Turku

Turku is located at 58.4° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 5 or higher.

With an average of 20.6 viable nights per year, patient observation may be rewarded.

The record span for these observations is from April 2, 2016, to March 30, 2026.

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

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

Turku experiences a Bortle 9 light pollution level, indicating significant artificial light.

Darker skies, rated Bortle 4 and 5, can be found approximately 33-36 km north-north-west near Mynämäki.

Local terrain includes parks, hills, beaches, and lakes, such as Jukupark, Mikkolanmäki, and Haunistenallas.

Geographic features near Turku include Jukupark, a park located 3.1 km north-north-west.

Mikkolanmäki, a hill, is situated 3.2 km west-north-west.

Further east, Ristimäki hill is 3.4 km away, while the beach at Littoisten Hiekkaranta is 6.0 km east. Haunistenallas lake is 6.6 km north-north-west.

There have been 61 verified aurora reports within 300 km of Turku between January 1, 2015, and December 31, 2016.

The data indicates an average of 20.6 viable nights per year for aurora viewing.

Notable qualifying nights with Kp 5.0 or higher occurred in late March 2026.

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 Turku 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 Turku.