Tromsø vs Alta

Aurora forecast comparison — updated hourly

Tonight's Verdict

🇳🇴

Tromsø

Peak: Oct–Mar

Skip it

Maybe

Book it

☀️ Too bright — midnight sun

Kp tonight3.0

Clouds (ECMWF)91%

Aurora probability13%

🇳🇴

Alta

Peak: Oct–Mar

Skip it

Maybe

Book it

☀️ Too bright — midnight sun

Kp tonight3.0

Clouds (ECMWF)76%

Aurora probability13%

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)91%76%

Cloud cover (GFS)100%77%

Dark hours––

Aurora probability13%13%

Solar wind speed––

Bz value––

Best window tonight22h (85%)22h (69%)

Highlighted cell = better value for aurora viewing

Next 3 Nights

Night🇳🇴 Tromsø🇳🇴 Alta

Thu, Aug 13

✗

91%

Kp 3.0

✗

76%

Kp 3.0

Fri, Aug 14

✗

100%

Kp 4.0

✗

100%

Kp 4.0

Sat, Aug 15

✗

100%

Kp 3.7

✗

84%

Kp 3.7

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. Tonight Alta has the clearer sky at 76% cloud cover versus 91% for the other city. 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→