Aurora Borealis in Ishøj
Denmark · 55.62°, 12.35° · geomagnetic 55.3° · needs Kp 7
Tonight's aurora forecast for Ishøj
5%
Peak chance of a visible display tonight, from the same model the Revon app runs. Ishøj 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.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Ishøj
Ishøj is at a geomagnetic latitude of 55.3°.
Auroras are typically visible at this latitude when the Kp index reaches 7.
On average, there are 2.5 nights per year with conditions suitable for aurora viewing.
The best months for aurora viewing in Ishøj are September, November, and August.
During May, June, and July, there is no full darkness.
Ishøj has a Bortle scale rating of 8, indicating significant light pollution.
Darker skies, rated Bortle 4, can be found 41 km west-north-west near Holbæk Municipality.
Another area with darker skies, rated Bortle 5, is located 40 km west-south-west near Ringsted Municipality.
Helgeshøj, a hill, is located 7.0 km north-west of Ishøj.
Barfredshøj, another hill, is 8.5 km west of Ishøj.
Damhussøen, a lake, is 10.3 km north-east of Ishøj. Kalveboderne, a bay, is 10.6 km east of Ishøj. Lindevangsparken, a park, is 12.3 km north-east of Ishøj.
There have been 6 verified aurora reports within 300 km of Ishøj between 2015 and 2016.
The period from 2016 to 2026 has recorded several nights with high Kp values, including Kp 7.0 on March 20, 2026, Kp 7.67 on January 20, 2026, Kp 8.67 on January 19, 2026, Kp 7.33 on November 12, 2025, and Kp 8.67 on November 11, 2025.
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
Know when it is worth going outside
Revon watches the Ishøj forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Nearby towns
Forecasts for places within reach of Ishøj.