Aurora Borealis in Trondheim

Norway · 63.43°, 10.40° · geomagnetic 63.0° · needs Kp 3

Tonight in Trondheim

39%

Peak chance of a visible display tonight, from the same model the Revon app runs. Trondheim needs Kp 3 before anything clears the northern horizon, and tonight the forecast peaks at Kp 5.7 — comfortably over the line.

Tonight Sun 02 Aug
39%
18
20
22
00
02
04
06
Tomorrow Mon 3 Aug
30%
Hour-by-hour for this night is in the app
Tuesday Tue 4 Aug
6%
Hour-by-hour for this night is in the app

Unlock every hour in the app

Updated 2026-08-02 20:20 UTC

The next 30 nights in Trondheim

Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 39%. 4 of the seven reach the Kp 3 that Trondheim needs, topping out at Kp 5.7. The 23 nights past the seven-day window move with the 27-day solar rotation and are updated daily in the app.

Moderate aurora activity tonight around 3 AM. Similar conditions expected on August 19th.

Sun 2
39%
Kp 5.7
Mon 3
30%
Kp 3.3
Tue 4
6%
Kp 1.9
Wed 5
33%
Kp 3.0
Thu 6
30%
Kp 3.0
Fri 7
26%
Kp 2.0
Sat 8
15%
Kp 2.0

Nights 8–30 unlock in the Revon app

See all 30 nights for Trondheim

Revon aurora model over the NOAA Kp forecast and 27-day outlook

How often the aurora borealis reaches Trondheim

115.6 nights a year, averaged across 10.0 years of records

Storm levelNights / year
Kp 483.4
Kp 528.7
Kp 69.3
Kp 73.2
Kp 81.2

NOAA planetary Kp, 2016-04-02 to 2026-03-30

You are inside the auroral oval

Trondheim sits far enough northern that quiet conditions are enough. What limits you here is cloud and moonlight, not geomagnetic activity.

Hours of true darkness, month by month

JanFebMarAprMayJunJulAugSepOctNovDec
12.310.17.10.00.00.00.00.05.49.211.712.8

Solar declination and hour angle at −18°

Nothing to see from April to August

Through those months the sun never falls more than 18° below the Trondheim horizon, so the sky never darkens fully. Plan around the darker half of the year.

Getting clear of the light

With 212,660 people around you, the sky over central Trondheim is Bortle 6. The glow hides anything but the brightest display, so the drive out matters more here than the forecast does.

Falchi 2016 World Atlas (DOI: 10.5880/GFZ.1.4.2016.001)

The months that actually deliver

Counting only nights that were both stormy enough and dark enough, March, September and October came out ahead in Trondheim. That is storm season and darkness overlapping — the equinoxes tend to be geomagnetically active, and the nights are already long by then.

Darkest nights of the coming year

A bright moon washes out a weak display as effectively as street lighting. These new moons fall inside the Trondheim viewing season.

Where it is close to a certainty

If you would rather plan a trip than wait for a storm, the nearest place with genuinely frequent aurora is Bodø, 466 km north-north-east in Norway.

TrondheimBodø
Kp needed33
Nights per year115.6 171.4
Geomagnetic latitude63.0° 66.0°

See the Bodø forecast

Confirmed reports from this area

284 verified sightings were logged within 300 km of Trondheim between 2015-01-01 and 2016-12-31. Rare is not the same as impossible.

Aurorasaurus verified positive reports

Where the horizon opens up near Trondheim

The display sits low on the northern horizon, so what beats a better forecast is open ground facing that way. Height gets you above the town glow; water gives you an unbroken skyline. These are within a short drive of Trondheim.

Places from GeoNames (CC BY 4.0)

What to do with the daylight

Aurora watching is a night job, and in winter that leaves a short, bright day to fill. Trondheim keeps its fortified past above ground, at Kristiansten, Kristiansten Fortress and Vassfjellet TV Mast, and for a day when the cloud sits low, Trondheim Science Centre are indoors and near by.

Keep the daylight loose: the sky decides the evening, and the forecast can turn within a few hours.

Places from GeoNames (CC BY 4.0)

Where to stay

Staying central in Trondheim is fine for everything except the aurora itself — you will still need to drive out. If seeing it matters more than convenience, base yourself on the edge of town facing your dark spot.

Places from GeoNames (CC BY 4.0) — confirm before booking

The last nights it was visible here

Nights in the last decade when the storm was strong enough for Trondheim and the sky was dark enough to show it.

DatePeak
2026-03-30Kp 3.0
2026-03-29Kp 3.33
2026-03-28Kp 3.67
2026-03-27Kp 3.33
2026-03-26Kp 3.0

NOAA planetary Kp

Know when it is worth going outside

Revon watches the Trondheim forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.

Get aurora alerts on iPhone

Common questions about the aurora borealis in Trondheim

Can you see the aurora borealis from Trondheim?

Yes. On the last 10.0 years of NOAA Kp records, Trondheim had about 115.6 nights a year when the storm was strong enough and the sky dark enough at the same time.

What Kp index do you need to see the aurora borealis in Trondheim?

Kp 3. Trondheim sits at geomagnetic latitude 63.0°, and the auroral oval only reaches that far from the pole once activity hits Kp 3.

When is the best time of year to see the aurora borealis in Trondheim?

March, September and October. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness. From April to August the sky over Trondheim never gets fully dark, so nothing is visible however strong the storm.

Where can you escape the light pollution near Trondheim?

The centre of Trondheim reads Bortle 6. The nearest sky at Bortle 4 is about 21 km west-north-west around Indre Fosen. On a marginal night that drive matters more than the forecast does.

Where is the nearest place to Trondheim with reliable aurora borealis?

Bodø, Norway — 466 km north-north-east. It needs only Kp 3 and averages 171.4 viable nights a year against 115.6 in Trondheim.

Nearby towns

Forecasts for places within reach of Trondheim.