Aurora Borealis in Heinola

Finland · 61.21°, 26.04° · geomagnetic 58.5° · needs Kp 5

Tonight's aurora forecast for Heinola

36%

Peak chance of a visible display tonight, from the same model the Revon app runs. Heinola 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
36%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Heinola

Auroras are visible on average 20.1 nights per year in this region. The data spans from April 2, 2016, to March 30, 2026.

A minimum Kp of 5 is generally required for aurora visibility. This location is at 58.5° geomagnetic latitude.

The best months for aurora viewing are September, March, and October. During these months, the nights are dark enough to potentially see the aurora.

From May through August, there is no full darkness due to the high latitude, which can make aurora viewing difficult even if the aurora is active.

Heinola has a Bortle scale rating of 4, indicating a dark sky. Areas with a Bortle rating of 4 are typically found in rural areas.

The horizon is relatively clear in several directions. Notable features include islands like Iso Savisaari and Vähä Savisaari to the north-west, and hills such as Rajavuori and Rupivuori to the east and north-east.

Near Heinola, several geographical features offer potential vantage points. These include islands such as Iso Savisaari and Vähä Savisaari located to the north-west.

Hills like Rajavuori and Rupivuori are situated to the east and north-east of the town. Rajaniemi, a headland, is also to the north.

There have been 42 verified aurora reports within 300 km of Heinola between January 1, 2015, and December 31, 2016.

The region has experienced aurora activity on numerous nights. Recent qualifying nights include March 20-24, 2026, with Kp values ranging from 5.0 to 7.0.

The historical data for viable nights per year is 20.1, based on records from April 2, 2016, to March 30, 2026.

Sources: Revon analysis of NOAA planetary Kp · Revon location dataset · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · GeoNames (CC BY 4.0) · Aurorasaurus verified positive reports

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Nearby towns

Forecasts for places within reach of Heinola.