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 tonight3.7

Clouds (ECMWF)95%

Aurora probability12%

🇳🇴

Alta

Peak: Oct–Mar

Skip it

Maybe

Book it

☀️ Too bright — midnight sun

Kp tonight3.7

Clouds (ECMWF)27%

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)95%27%

Cloud cover (GFS)100%89%

Dark hours––

Aurora probability12%12%

Solar wind speed––

Bz value––

Best window tonight22h (90%)23h (23%)

Highlighted cell = better value for aurora viewing

Next 3 Nights

Night🇳🇴 Tromsø🇳🇴 Alta

Fri, Jul 10

✗

95%

Kp 3.7

✓

27%

Kp 3.7

Sat, Jul 11

47%

Kp 3.0

47%

Kp 3.0

Sun, Jul 12

✗

99%

Kp 5.0

✓

33%

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. Tonight Alta has the clearer sky at 27% cloud cover versus 95% 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→