Aurora Borealis in Tromsø

Norway · 69.65°, 18.96° · geomagnetic 67.4° · needs Kp 3

Tonight's aurora forecast for Tromsø

49%

Peak chance of a visible display tonight, from the same model the Revon app runs. Tromsø needs Kp 3 before anything clears the northern horizon, and tonight the forecast peaks at Kp 4.8 — comfortably over the line.

Tonight Tue 08 Sep
49%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Tromsø

Tromsø is located at 67.4° geomagnetic latitude, an area where auroral displays are common.

With a minimum Kp of 3, the conditions are favorable for viewing the aurora.

On average, there are 97.8 viable nights per year for aurora viewing in this region.

The best months for aurora viewing in Tromsø are October, February, and March.

During April, May, June, July, and August, there is no full darkness, which can impact viewing conditions.

January and December experience polar night, offering extended periods of darkness.

Tromsø has a Bortle scale rating of 5, indicating a suburban sky brightness.

Areas with Bortle 4 sky brightness can be found 21 km west-north-west of Tromsø.

Further Bortle 5 conditions are present 11 km north of Tromsø.

Near Tromsø, the Aurora Boralis Viewpoint is a designated viewing spot.

Prestvatn landskapsvernområde and Håkøybotn naturreservat are nature reserves in the vicinity.

Other reserves include Kobbevågen naturreservat, Rakkfjordmyran naturreservat, and Dankarvågvatn naturreservat.

Between 2016 and 2026, there were 97.8 viable nights per year for aurora viewing.

Verified reports show 112 sightings within 300 km of Tromsø between 2015 and 2016.

Notable qualifying nights include March 27, 2026 (Kp 3.33), March 26, 2026 (Kp 3.0), and March 24, 2026 (Kp 5.0).

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 · OpenStreetMap contributors · Aurorasaurus verified positive reports

Know when it is worth going outside

Revon watches the Tromsø 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 Tromsø.