Aurora Borealis in Karlshamn

Sweden · 56.17°, 14.86° · geomagnetic 55.4° · needs Kp 7

Tonight's aurora forecast for Karlshamn

5%

Peak chance of a visible display tonight, from the same model the Revon app runs. Karlshamn 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
5%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:36 UTC

Local aurora guide for Karlshamn

Karlshamn is located at 55.4° geomagnetic latitude. Auroras are typically visible when the Kp index reaches 7.

On average, there are 2.5 nights per year with conditions suitable for aurora viewing in this region. The record span for observations is from 2016-04-02 to 2026-03-30.

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

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

Karlshamn has a Bortle scale rating of 4, indicating a relatively dark sky. Areas classified as Bortle 4 are found 11 km north-west near Karlshamns kommun.

The local terrain includes features such as Byasjön (lake) 3.1 km north, Långasjön (lake) 7.0 km north, and Horsö (island) 10.1 km east.

Geographic features near Karlshamn that may offer viewing opportunities include Byasjön, a lake located 3.1 km to the north.

Further afield, Långasjön lake is situated 7.0 km north, and Horsö island is 10.1 km east of the town.

Additional elevated terrain includes Håkantorpsåsen hill, 14.8 km west-north-west, and Valhall hill, 20.3 km west-north-west.

Historical records show 2 verified aurora sightings within 300 km of Karlshamn between 2015 and 2016.

Notable qualifying nights with high Kp values include 2026-03-20 (Kp 7.0), 2026-01-20 (Kp 7.67), and 2026-01-19 (Kp 8.67).

Other significant historical events occurred on 2025-11-12 (Kp 7.33) and 2025-11-11 (Kp 8.67).

Sources: 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 Karlshamn.