Tromsø at 69.65°N sits permanently inside the auroral oval— the ring around Earth's magnetic pole where aurora activity is most intense. Unlike Reykjavík or Oslo which need high KP levels to see aurora, Tromsø can see it at KP 2–3 on any clear night with favorable Bz. The city records aurora on roughly 100–200 nights per year.
Polar night — when the sun never rises above the horizon — runs from November 26 to January 15. This creates 51 consecutive days where the sky is perpetually dark enough to see aurora at any hour, day or night.
Real-time aurora scores — cloud cover fetched per location
Cloud cover fetched per GPS location · Solar wind is global · Auto-updates every 2 min
Best viewing window is 20:00–01:00 local time (UTC+1 in winter). During polar night, the aurora can appear at any hour — even midday. Geomagnetic midnight at Tromsø falls around 22:30 UTC+1, which is statistically the most active time.
Browse and book guided aurora tours from Tromsø directly below.