is the aurora visible?

Northern lights in Tromsø in May

No — the midnight sun keeps Tromsø's sky bright all May.

0%of nights offer a window
0 hof darkness per night
97%of days with enough solar activity
0%of nights with a clear hour

At Tromsø's latitude the sun never drops far enough below the horizon in May for the sky to go properly dark. Aurora may well be happening overhead — you just cannot see it against a bright sky.

If your dates are fixed to May, no viewing spot or tour can fix the physics. Shift the trip toward the season edges instead — late August at the earliest, or spring before the light returns.

Numbers come from 1996–2025 Kp records (GFZ Potsdam) and 2015–2024 hourly cloud history for Tromsø itself — the full method is on the methodology page. Travelling soon? Check tonight's live Tromsø forecast.

May against the rest of the year

  1. Jan32% of nights
  2. Feb27% of nights
  3. Mar29% of nights
  4. Apr15% of nights
  5. Maymidnight sun
  6. Junmidnight sun
  7. Julmidnight sun
  8. Aug3% of nights
  9. Sep28% of nights
  10. Oct33% of nights
  11. Nov26% of nights
  12. Dec21% of nights

April in Tromsø · June in Tromsø · full year overview

May elsewhere under the oval