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 tonight4.3

Clouds (ECMWF)0%

Aurora probability8%

🇳🇴

Alta

Peak: Oct–Mar

Skip it

Maybe

Book it

☀️ Too bright — midnight sun

Kp tonight4.3

Clouds (ECMWF)0%

Aurora probability9%

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%0%

Cloud cover (GFS)0%0%

Dark hours––

Aurora probability8%9%

Solar wind speed451 km/s451 km/s

Bz value+0.8 nT+0.8 nT

Best window tonight22h (0%)22h (0%)

Highlighted cell = better value for aurora viewing

Next 3 Nights

Night🇳🇴 Tromsø🇳🇴 Alta

Sun, Jun 28

✓

Kp 4.3

✓

Kp 4.3

Mon, Jun 29

✗

100%

Kp 4.7

✗

88%

Kp 4.7

Tue, Jun 30

✗

99%

Kp 5.0

✗

93%

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→