Aurora Borealis in Horten

Norway · 59.42°, 10.48° · geomagnetic 59.2° · needs Kp 5

Tonight's aurora forecast for Horten

51%

Peak chance of a visible display tonight, from the same model the Revon app runs. Horten needs Kp 5 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 10:35 UTC

Local aurora guide for Horten

Horten is located at 59.2° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 5.

Based on historical data, there are approximately 21.3 nights per year suitable for aurora viewing in this region. The record span for this data is from April 2, 2016, to March 30, 2026.

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

However, from May through August, Horten experiences periods without full darkness, which can impact viewing opportunities.

Horten has a Bortle scale rating of 7, indicating significant light pollution. Areas with lower Bortle ratings offer darker skies.

Darker skies, such as Bortle 4, can be found 58 km east near Indre Østfold. Bortle 5 skies are available 46 km west-south-west near Siljan.

Local terrain features include the island of Østøya 3.2 km north, Mellomøya island 3.2 km north-north-west, and the hill Bjerkerønningen 3.4 km west-north-west.

Geographic features near Horten include Østøya, an island located 3.2 km to the north. Mellomøya, another island, is situated 3.2 km north-north-west.

Inland, the hill Bjerkerønningen is 3.4 km west-north-west of Horten. Veierudåsen hill is 3.6 km north-west, and Vegsletta headland is 4.5 km north-north-west.

There have been 241 verified aurora reports within 300 km of Horten between January 1, 2015, and December 31, 2016.

The data indicates approximately 21.3 viable nights per year for aurora viewing. The period analyzed for this data spans from April 2, 2016, to March 30, 2026.

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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Revon watches the Horten forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.

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Nearby towns

Forecasts for places within reach of Horten.