Aurora Borealis in South Denmark
Denmark · 55.30°, 9.69° · geomagnetic 55.4° · needs Kp 7
Tonight in South Denmark
15%
Peak chance of a visible display tonight, from the same model the Revon app runs. South Denmark needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 5.7. Short of the threshold, which is what most nights look like here.
Updated 2026-08-02 20:20 UTC
The next 30 nights in South Denmark
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 15%. Not one of the seven reaches the Kp 7 that South Denmark needs, which is normal rather than unlucky — it averages 2.5 viable nights a year. 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 South Denmark
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches South Denmark
2.5 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
Wait for an alert; do not book a week
At Kp 7, South Denmark needs a severe geomagnetic storm before anything shows above the northern horizon. Storms that size arrive a handful of times per solar cycle and announce themselves a day or two ahead. Watching for one beats picking dates and hoping.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11.8 | 10.3 | 8.2 | 5.0 | 0.0 | 0.0 | 0.0 | 3.3 | 7.1 | 9.6 | 11.5 | 12.2 |
Solar declination and hour angle at −18°
Nothing to see from May to July
Through those months the sun never falls more than 18° below the South Denmark horizon, so the sky never darkens fully. Plan around the darker half of the year.
Getting clear of the light
With 558,997 people around you, the sky over central South Denmark is Bortle 5. The glow hides anything but the brightest display, so the drive out matters more here than the forecast does.
- 7 km south-south-east — around Haderslev Municipality → Bortle 5
- 13 km west-south-west — around Haderslev Municipality → 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, September, November and August came out ahead in South Denmark. 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 South Denmark viewing season.
- 13 Aug 2026
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 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 Inverness, 888 km west-north-west in United Kingdom.
| South Denmark | Inverness | |
|---|---|---|
| Kp needed | 7 | 5 |
| Nights per year | 2.5 | 28.7 |
| Geomagnetic latitude | 55.4° | 59.8° |
Confirmed reports from this area
6 verified sightings were logged within 300 km of South Denmark 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 South Denmark
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 South Denmark.
- Jørlhage — headland3.4 km west-north-west
- Knudshoved — headland3.7 km north-west
- Knud Strand — beach3.7 km north-west
- Brandsø — island6.2 km north
- Egholm — island6.6 km east-north-east
- Hejlsminde Bugt — bay7.9 km north-north-west
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 South Denmark and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-20 | Kp 7.0 |
| 2026-01-20 | Kp 7.67 |
| 2026-01-19 | Kp 8.67 |
| 2025-11-12 | Kp 7.33 |
| 2025-11-11 | Kp 8.67 |
NOAA planetary Kp
Aurora forecasts across South Denmark
All 12 places in South Denmark with a forecast page, and the Kp each one needs.
- AabenraaKp 7
- EsbjergKp 7
- FredericiaKp 7
- HaderslevKp 7
- KoldingKp 7
- MiddelfartKp 7
- NyborgKp 7
- OdenseKp 7
- SvendborgKp 7
- SønderborgKp 7
- TønderKp 7
- VejleKp 7
Know when it is worth going outside
Revon watches the South Denmark forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in South Denmark
Can you see the aurora borealis from South Denmark?
Yes. On the last 10.0 years of NOAA Kp records, South Denmark had about 2.5 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 South Denmark?
Kp 7. South Denmark sits at geomagnetic latitude 55.4°, and the auroral oval only reaches that far from the pole once activity hits Kp 7. Storms that size occur about 3.2 nights a year.
When is the best time of year to see the aurora borealis in South Denmark?
September, November and August. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness. From May to July the sky over South Denmark never gets fully dark, so nothing is visible however strong the storm.
Where can you escape the light pollution near South Denmark?
The centre of South Denmark reads Bortle 5. The nearest sky at Bortle 4 is about 13 km west-south-west around Haderslev Municipality. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to South Denmark with reliable aurora borealis?
Inverness, United Kingdom — 888 km west-north-west. It needs only Kp 5 and averages 28.7 viable nights a year against 2.5 in South Denmark.
Nearby towns
Forecasts for places within reach of South Denmark.