Aurora Borealis in Trøndelag
Norway · 63.59°, 10.85° · geomagnetic 63.1° · needs Kp 3
Tonight in Trøndelag
38%
Peak chance of a visible display tonight, from the same model the Revon app runs. Trøndelag needs Kp 3 before anything clears the northern horizon, and tonight the forecast peaks at Kp 5.7 — comfortably over the line.
Updated 2026-08-02 20:20 UTC
The next 30 nights in Trøndelag
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 38%. 4 of the seven reach the Kp 3 that Trøndelag 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.
Nights 8–30 unlock in the Revon app
See all 30 nights for Trøndelag
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches Trøndelag
115.0 nights a year, averaged across 10.0 years of records
| Storm level | Nights / year |
|---|---|
| Kp 4 | 83.4 |
| Kp 5 | 28.7 |
| Kp 6 | 9.3 |
| Kp 7 | 3.2 |
| Kp 8 | 1.2 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
You are inside the auroral oval
Trøndelag 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
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.3 | 10.1 | 7.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5.3 | 9.2 | 11.7 | 12.9 |
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 Trøndelag horizon, so the sky never darkens fully. Plan around the darker half of the year.
Getting clear of the light
With 232,831 people around you, the sky over central Trøndelag is Bortle 6. The glow hides anything but the brightest display, so the drive out matters more here than the forecast does.
- 12 km south-east — around Stjørdal → Bortle 5
- 19 km north-north-west — around Indre Fosen → Bortle 4
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 Trøndelag. 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 Trøndelag viewing season.
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 2027
- 08 Mar 2027
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, 442 km north-north-east in Norway.
| Trøndelag | Bodø | |
|---|---|---|
| Kp needed | 3 | 3 |
| Nights per year | 115.0 | 171.4 |
| Geomagnetic latitude | 63.1° | 66.0° |
Confirmed reports from this area
284 verified sightings were logged within 300 km of Trøndelag 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 Trøndelag
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 Trøndelag.
- Liavatnet — lake3.3 km west-north-west
- Hovdalsvatnet — lake3.4 km north-north-east
- Gaupåsen — hill3.4 km west-north-west
- Hovdalsåsen — hill3.4 km north-north-west
- Hesthåggånebben — headland3.9 km east-north-east
- Sundalsfjorden — bay4.1 km north-east
Places from GeoNames (CC BY 4.0)
The last nights it was visible here
Nights in the last decade when the storm was strong enough for Trøndelag and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-30 | Kp 3.0 |
| 2026-03-29 | Kp 3.33 |
| 2026-03-28 | Kp 3.67 |
| 2026-03-27 | Kp 3.33 |
| 2026-03-26 | Kp 3.0 |
NOAA planetary Kp
Aurora forecasts across Trøndelag
All 2 places in Trøndelag with a forecast page, and the Kp each one needs.
Know when it is worth going outside
Revon watches the Trøndelag forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Trøndelag
Can you see the aurora borealis from Trøndelag?
Yes. On the last 10.0 years of NOAA Kp records, Trøndelag had about 115.0 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 Trøndelag?
Kp 3. Trøndelag sits at geomagnetic latitude 63.1°, 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 Trøndelag?
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 Trøndelag never gets fully dark, so nothing is visible however strong the storm.
Where can you escape the light pollution near Trøndelag?
The centre of Trøndelag reads Bortle 6. The nearest sky at Bortle 4 is about 19 km north-north-west around Indre Fosen. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to Trøndelag with reliable aurora borealis?
Bodø, Norway — 442 km north-north-east. It needs only Kp 3 and averages 171.4 viable nights a year against 115.0 in Trøndelag.
Nearby towns
Forecasts for places within reach of Trøndelag.
- 🇳🇴 Kristiansund - Norway164 km
- 🇸🇪 Östersund - Sweden194 km
- 🇳🇴 Molde - Norway208 km
- 🇳🇴 Ålesund - Norway267 km
- 🇳🇴 Lillehammer - Norway276 km
- 🇳🇴 Gjøvik - Norway311 km
- 🇳🇴 Hamar - Norway311 km
- 🇳🇴 Mo i Rana - Norway340 km