Tromsø vs Alta

Aurora forecast comparison — updated hourly

Tonight's Verdict
🇳🇴
Tromsø
Peak: Oct–Mar
Skip it
Maybe
Book it
✅ Great night — book it!
Kp tonight5.7
Clouds (ECMWF)0%
Aurora probability12%
🇳🇴
Alta
Peak: Oct–Mar
Skip it
Maybe
Book it
✅ Great night — book it!
Kp tonight5.7
Clouds (ECMWF)2%
Aurora probability12%
Head-to-Head
Metric🇳🇴 Tromsø🇳🇴 Alta
Latitude69.7°N70.1°N
Kp for overhead auroraKp 1+Kp 1+
Kp for good displayKp 3+Kp 3+
Cloud cover (ECMWF)0%2%
Cloud cover (GFS)12%12%
Dark hours4.8h4.6h
Aurora probability12%12%
Solar wind speed334 km/s334 km/s
Bz value+0.8 nT+0.8 nT
Best window tonight22h (0%)22h (2%)

Highlighted cell = better value for aurora viewing

Next 3 Nights
Night🇳🇴 Tromsø🇳🇴 Alta
Fri, Apr 17
✓
0%
Kp 5.7
✓
2%
Kp 5.7
Sat, Apr 18
✓
0%
Kp 6.0
✓
17%
Kp 6.0
Sun, Apr 19
✓
17%
Kp 5.0
✓
0%
Kp 5.0
Which should I choose?

Tromsø vs Alta — Which should I choose?

Both cities require Kp 1+ to see aurora overhead, placing them at a similar position relative to the auroral oval. Tromsø: Inside the auroral oval — peak aurora season September to March. Alta: Aurora Capital of the World — darker skies and fewer crowds than Tromsø.

Full Forecasts
🇳🇴View full Tromsø forecast→🇳🇴View full Alta forecast→
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