Aurora Borealis in Oskarshamn

Sweden · 57.26°, 16.45° · geomagnetic 56.2° · needs Kp 7

Tonight's aurora forecast for Oskarshamn

11%

Peak chance of a visible display tonight, from the same model the Revon app runs. Oskarshamn 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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Updated 2026-09-08 10:36 UTC

Local aurora guide for Oskarshamn

Oskarshamn is located at 56.2° geomagnetic latitude. Auroras visible here typically require a Kp of 7 or higher.

On average, there are about 2.5 nights per year with conditions suitable for aurora viewing in this region.

The historical record for aurora observations in this area spans from April 2, 2016, to March 30, 2026.

The months of September, November, and August offer the best opportunities for aurora viewing in Oskarshamn.

During May, June, and July, the region experiences periods without full darkness, which can impact viewing conditions.

Oskarshamn is situated in an area with a Bortle scale rating of 4, indicating a relatively dark sky.

Specific areas near Oskarshamns kommun, approximately 3 km east-south-east, are also rated Bortle 4.

The surrounding terrain includes islands such as Saxskär and Viskär to the east and north-east, a lake named Rungeln to the north-north-west, another lake Eckern to the west-north-west, and Blå Jungfrun Nationalpark to the east.

Geographic features near Oskarshamn include islands like Saxskär, located 3.7 km east-north-east, and Viskär, 5.0 km north-east.

Inland, Rungeln lake is situated 6.1 km north-north-west, and Eckern lake is 8.0 km west-north-west.

Further east, approximately 20.1 km away, lies Blå Jungfrun Nationalpark.

There have been 21 verified aurora reports within a 300 km radius of Oskarshamn between January 1, 2015, and December 31, 2016.

Notable recent qualifying nights, based on Kp index, include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), and January 19, 2026 (Kp 8.67).

Additional qualifying nights occurred on November 12, 2025 (Kp 7.33) and November 11, 2025 (Kp 8.67).

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 Oskarshamn.