Tromsø vs Alta

Aurora forecast comparison — updated hourly

Tonight's Verdict

🇳🇴

Tromsø

Peak: Oct–Mar

Skip it

Maybe

Book it

🚫 Not tonight — too cloudy

Kp tonight4.0

Clouds (ECMWF)100%

Aurora probability1%

🇳🇴

Alta

Peak: Oct–Mar

Skip it

Maybe

Book it

🚫 Not tonight — too cloudy

Kp tonight4.0

Clouds (ECMWF)93%

Aurora probability1%

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)100%93%

Cloud cover (GFS)100%68%

Dark hours4.8h4.6h

Aurora probability1%1%

Solar wind speed––

Bz value––

Best window tonight22h (100%)00h (91%)

Highlighted cell = better value for aurora viewing

Next 3 Nights

Night🇳🇴 Tromsø🇳🇴 Alta

Sun, Sep 27

✗

100%

Kp 4.0

✗

93%

Kp 4.0

Mon, Sep 28

✗

53%

Kp 2.0

✗

68%

Kp 2.0

Tue, Sep 29

✗

92%

Kp 1.7

✗

51%

Kp 1.7

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→