Aurora Borealis in Vaasa

Finland · 63.10°, 21.62° · geomagnetic 61.0° · needs Kp 5

Tonight's aurora forecast for Vaasa

47%

Peak chance of a visible display tonight, from the same model the Revon app runs. Vaasa 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
47%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Vaasa

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

With an average of 18.9 viable nights per year, patient observers may have opportunities to witness auroral activity.

The historical record spans from April 2, 2016, to March 30, 2026.

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

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

Vaasa experiences significant light pollution, with a Bortle scale rating of 8.

Areas with darker skies, such as near Korsholm 18 km north-north-west, are rated Bortle 3.

Potential viewing locations include islands like Hästgrund and Själbådan, headlands like Storgrundsbådan and Villskatan, and the lake Infjärden, all within approximately 3.4 km of Vaasa.

Geographic features near Vaasa include islands such as Hästgrund, located 3.0 km west-north-west, and Själbådan, 3.2 km north-west.

Headlands like Storgrundsbådan and Villskatan, both approximately 3.2 km north-west, and the lake Infjärden, 3.4 km north, offer varied terrain.

These locations provide context for potential aurora viewing in the Ostrobothnia region.

Between January 1, 2015, and December 31, 2016, there were 146 verified aurora reports within 300 km of Vaasa.

The period from April 2, 2016, to March 30, 2026, includes several nights with significant geomagnetic activity.

Notable qualifying nights within this span include March 20, 2026 (Kp 7.0), March 21, 2026 (Kp 6.0), March 22, 2026 (Kp 6.67), March 23, 2026 (Kp 5.0), and March 24, 2026 (Kp 5.0).

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 Vaasa 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 Vaasa.