Aurora Borealis in Mäntsälä
Finland · 60.63°, 25.32° · geomagnetic 58.1° · needs Kp 5
Tonight's aurora forecast for Mäntsälä
28%
Peak chance of a visible display tonight, from the same model the Revon app runs. Mäntsälä 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.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Mäntsälä
Mäntsälä is located at 58.1° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 5.
On average, there are 20.4 nights per year with conditions suitable for aurora viewing in this region. The historical record spans from 2016 to 2026.
The best months for aurora viewing in Mäntsälä are September, October, and March. These months offer a good balance of darkness and potential aurora activity.
However, from May through August, the region experiences periods with no full darkness, which can significantly reduce viewing opportunities during those months.
Mäntsälä has a Bortle scale rating of 6, indicating moderate light pollution. Areas with darker skies, such as Bortle 4 conditions near Iitti, are approximately 65 km away.
Closer to Mäntsälä, Bortle 5 conditions can be found near Askola, about 18 km to the south-east.
Notable terrain features around Mäntsälä include the hill of Heinilänmäki to the east, Luotomäki hill to the west, the lake Iso-Vuotava to the east-north-east, Korpilammi lake also to the east-north-east, and Pukkisaari island to the north-west.
Heinilänmäki, a hill located 3.3 km east of Mäntsälä, offers a potential vantage point.
To the west of Mäntsälä, Luotomäki is another hill situated 3.6 km away.
East-north-east of the town, the lake Iso-Vuotava is located 5.3 km away, and Korpilammi lake is 5.5 km away in the same direction. Pukkisaari island is 8.6 km north-west of Mäntsälä.
Between 2015 and 2016, there were 41 verified aurora reports within a 300 km radius of Mäntsälä.
The historical record includes several nights with Kp 5.0 or higher, such as 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
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Nearby towns
Forecasts for places within reach of Mäntsälä.