Aurora Borealis in Kalmar

Sweden · 56.66°, 16.36° · geomagnetic 55.7° · needs Kp 7

Tonight's aurora forecast for Kalmar

6%

Peak chance of a visible display tonight, from the same model the Revon app runs. Kalmar needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.8. 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 10:36 UTC

Local aurora guide for Kalmar

Aurora viewing in Kalmar is influenced by geomagnetic activity. A minimum Kp of 7 is generally required for visible aurora at this latitude.

Kalmar is located at 55.7° geomagnetic latitude. This means that aurora visible here requires significant geomagnetic storms.

On average, there are about 2.5 nights per year with sufficient geomagnetic activity for aurora viewing in Kalmar, based on historical data spanning from 2016 to 2026.

The best months for aurora viewing in Kalmar are September, November, and August. These months offer a good balance of darkness and potential aurora activity.

During May, June, and July, Kalmar experiences periods without full darkness, which can significantly reduce the chances of observing the aurora.

Kalmar has a Bortle rating of 4, indicating a dark sky location. Areas 12 km north-west of Kalmar also fall within Bortle 4.

The horizon in Kalmar is influenced by several geographical features. These include headlands like Svensknabben and Bergaudd, and islands such as Norra Skallö and Törnskär, located within a few kilometers north and north-east of the city.

Geographic features near Kalmar offer varied horizons. Svensknabben and Bergaudd are headlands located about 3.0 km and 4.3 km north of Kalmar, respectively.

Islands such as Norra Skallö and Törnskär are situated approximately 3.4 km and 4.3 km north-east of Kalmar. Ölandsbron, a lighthouse, is also located to the north-east.

Historical data indicates approximately 2.5 viable aurora nights per year in Kalmar, based on records from 2016 to 2026.

There are 3 verified aurora reports within 300 km of Kalmar between 2015 and 2016.

Notable qualifying nights with high Kp values include November 11, 2025 (Kp 8.67), November 12, 2025 (Kp 7.33), January 19, 2026 (Kp 8.67), and January 20, 2026 (Kp 7.67).

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 Kalmar.