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Northern Lights Forecast for Tromsø Tonight

Tromsø has strong northern lights potential during the dark season, while cloud cover, useful darkness, and local lighting still decide what can be seen.

Worth watching

Keep an eye on the sky tonight

Conditions are promising enough to monitor, especially from a dark place with an open view. Timing and cloud cover can decide the outcome.

Tonight in Tromsø: Medium chance

Practical viewing window: 8:02 PM–5:19 AM local time

Darkness guide

Is twilight good or bad for aurora?

Darker is better. A darker sky creates more contrast, making faint colors and movement easier to see.

Full darkness

Best visibilityYour forecast

Sun below −18°

The sky offers its best contrast. Fainter aurora has a better chance of standing out.

Astronomical twilight

Good, with limits

Sun between −18° and −12°

The sky is not completely dark, but a moderate or bright display can still be clearly visible.

Nautical twilight

Difficult

Sun between −12° and −6°

Twilight still brightens the sky. Usually only vivid aurora will be easy to see with your eyes.

Bright summer sky

Poor visibility

Sun stays above −6°

The sky is too bright for routine viewing. An exceptional display may still appear, but it is not something to plan around.

Practical takeaway: aurora activity and darkness are separate. A strong forecast during twilight means aurora may be active, but the bright sky can make it harder to see.
Now
None
Typical activity
Kp 0+
Approximate oval reach
Where to look
Overhead or across the sky
Weather
Sky outlook unavailable
Aurora activity, darkness, and cloud cover are evaluated separately. The forecast uses the local observing night, including nights that cross UTC dates. Aurora forecast data refreshes every ten minutes. See how the forecast works.

Night-by-night forecast for Tromsø

Tonight

Sep 20

Medium
Peak Kp 2.0

Tomorrow

Sep 21

Low
Peak Kp 1.7

Tuesday

Sep 22

Low
Peak Kp 1.7
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Local viewing guide

Aurora inTromsø

Latitude
69.6° N
Location
Troms, Norway

At roughly 69.6° north in Troms, Tromsø is far enough north for the aurora to be a realistic part of the dark season. Active nights can bring displays across a broad part of the sky, although visibility still depends on darkness and clear weather. Although Tromsø is a well-known aurora base, the city center still produces enough light to make darker surroundings worthwhile.

Tromsø is relatively compact, which can make darker surroundings easier to reach than in a large city. Local streetlights still matter, so find a safe open view and keep bright lamps outside your immediate line of sight.

The useful season is the darker part of the year. Late spring and summer bring very short nights or no meaningful darkness, while autumn and winter provide longer viewing windows. Cloud cover remains decisive: aurora activity cannot be seen through an overcast sky.

Treat a promising Tromsø forecast as a reason to prepare, not a promise of a display. Check the sky repeatedly, use a wide, unobstructed sky, and remember that a phone or camera may reveal weak color before it is clear to the naked eye.

How to use tonight's forecast in Tromsø

The current aurora chance for Tromsø is None. Use the local viewing guide above for Tromsø-specific context, then combine the live rating with darkness and weather.

What the current chance means

A none or near-none chance in Tromsø usually means tonight is not a strong aurora setup for this location. It is still useful context, because you can compare later updates or look at cities farther north for better odds.

Learn

Aurora guides for nights like Tromsø

Read these guides when the Tromsø forecast looks interesting but you still need help judging darkness, season, or viewing conditions.

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