Aurora Borealis in Tønsberg

Norway · 59.27°, 10.41° · geomagnetic 59.1° · needs Kp 5

Tonight's aurora forecast for Tønsberg

51%

Peak chance of a visible display tonight, from the same model the Revon app runs. Tønsberg 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
51%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Tønsberg

Tønsberg is located at 59.1° geomagnetic latitude. Auroras visible at this latitude typically require a Kp index of 5 or higher.

On average, there are about 21.5 nights per year with conditions suitable for aurora viewing. These opportunities occur between April 2, 2016, and March 30, 2026.

The best months for aurora viewing in Tønsberg are September, March, and October. During these months, the nights are long enough for potential aurora displays.

From May through August, Tønsberg experiences periods with no full darkness, which can significantly reduce the visibility of auroras.

Tønsberg has a Bortle scale rating of 7, indicating significant light pollution. Areas with darker skies, such as near Færder (Bortle 5) or Larvik (Bortle 4), may offer better viewing conditions.

Several elevated locations around Tønsberg offer varied horizons. Manumåsen, a hill 3.6 km west, and Prestelia, a hill 4.3 km north-north-east, provide westward and eastward views respectively. Kjempeodden and Ringshaugodden, both headlands 5.4 km east and east-north-east, offer views towards the east. Bakkeskogstranda, a beach 8.3 km north-east, also provides an eastern perspective.

Manumåsen is a hill located 3.6 km west of Tønsberg. Prestelia, another hill, is situated 4.3 km north-north-east of the city.

Coastal features like Kjempeodden and Ringshaugodden are headlands located 5.4 km east and east-north-east of Tønsberg, respectively. Bakkeskogstranda is a beach found 8.3 km north-east of Tønsberg.

Between January 1, 2015, and December 31, 2016, there were 20 verified aurora reports within 300 km of Tønsberg.

The historical record includes several nights with Kp values of 5.0 or higher, such as March 24, 2026 (Kp 5.0), March 23, 2026 (Kp 5.0), March 21, 2026 (Kp 6.0), and March 20, 2026 (Kp 7.0). March 22, 2026, recorded a Kp of 6.67.

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 Tønsberg.