Northern lights in Tromsø tonight
Northern Norway · 70° magnetic latitude · Kp 1–2 threshold
Kp 1 is at the threshold for Tromsø. Aurora may be visible from a dark site if cloud cover permits.
7-day outlook for Tromsø
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Tromsø sits at a magnetic latitude of approximately 70°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 1–2 before the auroral oval expands far enough south to be visible from here.
At Kp 1–2, visibility is possible from Tromsø but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Tromsø
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Kvaløya island - Ersfjordbotn
Get directions ↗A 40-minute drive west of Tromsø centre across the bridge. The fjord curves north and gives an open horizon with virtually no light pollution. One of the most popular local chase destinations used by guides.
Senja island
Get directions ↗90 minutes south of Tromsø on the E8 and ferry. The north coast of Senja gives dramatic sea cliffs facing north with Bortle 2 skies. For dedicated photography trips this is one of Norway's finest aurora foregrounds.
Lyngen Alps
Get directions ↗The mountain range east of Tromsø across Ullsfjord. High-altitude positions on the Lyngen peninsula give elevation above cloud and a dark sky above 600 m. Several Lyngen lodges cater specifically to aurora tourism.
Best time to see the northern lights in Tromsø
At 70°N magnetic latitude, Tromsø has one of the longest aurora seasons in the world. Meaningful darkness returns in late August and displays are possible on almost any clear night from September through March. Only the endless daylight of May, June, and July rules out viewing completely.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Tromsø's latitude.
May through July is effectively impossible for aurora viewing: the midnight sun keeps the sky bright around the clock at this latitude. No storm level, not even G5, can produce a visible display without astronomical darkness.
Other Norway aurora forecasts
How often does the aurora appear in Tromsø?
Average nights per month the Kp reached Tromsø's threshold of 1+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 1+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Tromsø
Best window
The January to March window averages 82 aurora nights - the strongest consecutive stretch of the year.
How long to stay
Aurora at this latitude requires patience - allow as many nights as possible during October.
Related pages
Northern Lights Norway
Norway-wide aurora forecast hub.
Read →Northern Lights Alta Tonight
Alta is east of Tromsø with similar aurora conditions.
Read →Northern Lights Svalbard Tonight
Svalbard at 78°N - the most extreme aurora destination.
Read →Northern Lights Photography
Camera settings and technique for Norway aurora photography.
Read →What Is the Kp Index?
Why Kp 1-2 is enough at 70°N magnetic latitude.
Read →Northern Lights Bucket List
Tromsø dog sled aurora tours are one of the world's top 12 aurora experiences.
Read →Aurora photographs from Tromsø
Real photos sourced from Wikimedia Commons.
Aurora over Tromsø 
Aurora over Tromsø 
Aurora over Tromsø 
Aurora over Tromsø 
Aurora over Tromsø 
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