Northern Lights Forecast for Trondheim

Several times in a typical season, usually as a glow or arc low in the north. At 63.4°N Trondheim does not need a big storm, but the city lights hide weaker displays, so the usual places are Bymarka above the city or the shore at Lade or Trolla, looking north over the Trondheimsfjord. On strong nights it can be seen over the center.

The bus to Skistua drops you at the foot of Gråkallen, 552 m, a walk of about 1.5 km to the top. The Gråkallen Line tram runs from St. Olavs gate up to Lian, 234 m, at the edge of Bymarka. For a sea-level view north over the fjord, take the bus out to Lade and walk the Ladestien path to Korsvika beach, about 4 km from the center. Kristiansten Fortress is walkable from downtown but only works on strong nights.

Yes. Trondheim is at 63.4°N, about three and a half degrees of latitude north of Oslo, and a moderately active night is often enough for a glow low in the north over the Trondheimsfjord. In Oslo a night like that brings a faint arc at most, and it takes a geomagnetic storm to put color over the city. In Trondheim it is the city's own light that hides the weaker displays, which is why people head up to Bymarka or out to the shore at Lade.

Yes, if you want height above the city. Gråkallen is a 552 m summit in Bymarka, about 7 km west of the center, with the city lights below and views in several directions. Park or get off the bus at Skistua and walk about 1.5 km up; the path is open all year. The round radar dome on top is a landmark you can see from the city.

The aurora season in Trondheim runs from mid-August to late April, when the nights get dark. Your best chances are in September and October, and again in February and March, when the aurora shows on some clear nights. The longest nights, around 21 December, have about 15 hours of darkness.

No. From late May to mid-July the nights in Trondheim stay light. The aurora is still there, but the sky is too bright to see it.

In Trondheim, you usually need at least Kp 2 to have a reasonable chance of seeing the northern lights. Lower Kp can still bring a faint aurora display low on the northern horizon, but it is less common.

This is based on magnetic latitude, and Kp index is a global geomagnetic index, so treat it as a rule of thumb, not a location-specific guarantee.

Tonight, the NOAA Kp index forecast is 1.3 to 1.7. That is a bit below the usual Kp index threshold for Trondheim, so there is still a small chance of seeing faint aurora low on the northern horizon.