Aurora Borealis in Västmanland
Sweden · 59.57°, 16.27° · geomagnetic 58.5° · needs Kp 5
Tonight in Västmanland
36%
Peak chance of a visible display tonight, from the same model the Revon app runs. Västmanland needs Kp 5, and tonight the forecast peaks at Kp 5.7. That is on the threshold rather than over it, so cloud and moonlight will decide the night.
Updated 2026-08-02 20:20 UTC
The next 30 nights in Västmanland
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 36%. One of the seven reaches the Kp 5 that Västmanland needs: Sunday 2 Aug, 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 Västmanland
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches Västmanland
21.2 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
Worth watching through the dark half of the year
Kp 5 is a moderate storm — not an everyday event, but common enough that a patient observer in Västmanland sees the aurora borealis most winters.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.0 | 10.2 | 7.7 | 3.3 | 0.0 | 0.0 | 0.0 | 0.0 | 6.4 | 9.5 | 11.6 | 12.5 |
Solar declination and hour angle at −18°
Nothing to see from May to August
Through those months the sun never falls more than 18° below the Västmanland horizon, so the sky never darkens fully. Plan around the darker half of the year.
Getting clear of the light
The sky over Västmanland reads Bortle 7. Getting clear of the built-up area makes a visible difference on a marginal night.
- 21 km north — around Surahammars kommun → Bortle 5
- 36 km north-west — around Skinnskattebergs kommun → 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, March and October came out ahead in Västmanland. 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 Västmanland 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, 863 km north in Norway.
| Västmanland | Bodø | |
|---|---|---|
| Kp needed | 5 | 3 |
| Nights per year | 21.2 | 171.4 |
| Geomagnetic latitude | 58.5° | 66.0° |
Confirmed reports from this area
82 verified sightings were logged within 300 km of Västmanland 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 Västmanland
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 Västmanland.
- Dammberget — hill7.6 km north
- Vargberget — hill9.8 km north-north-east
- Västersjön — lake14.4 km north-north-west
- Långsjön — lake15.0 km north
- Västraholmen — island15.8 km east
- Västeråsfjärden — bay16.6 km east
Places from GeoNames (CC BY 4.0)
Where to stay
Anywhere on the outskirts of Västmanland will do; what matters is being able to step outside and check the sky without a drive first.
- Brukshotellet 6.4 km from the centre
- Best Western Malaren Hotell & Konferens 15.0 km from the centre
- Lovudden Hotel 13.3 km from the centre
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 Västmanland and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-24 | Kp 5.0 |
| 2026-03-23 | Kp 5.0 |
| 2026-03-22 | Kp 6.67 |
| 2026-03-21 | Kp 6.0 |
| 2026-03-20 | Kp 7.0 |
NOAA planetary Kp
Aurora forecasts across Västmanland
All 2 places in Västmanland with a forecast page, and the Kp each one needs.
Know when it is worth going outside
Revon watches the Västmanland forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Västmanland
Can you see the aurora borealis from Västmanland?
Yes. On the last 10.0 years of NOAA Kp records, Västmanland had about 21.2 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 Västmanland?
Kp 5. Västmanland sits at geomagnetic latitude 58.5°, and the auroral oval only reaches that far from the pole once activity hits Kp 5. Storms that size occur about 28.7 nights a year.
When is the best time of year to see the aurora borealis in Västmanland?
September, March and October. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness. From May to August the sky over Västmanland never gets fully dark, so nothing is visible however strong the storm.
Where can you escape the light pollution near Västmanland?
The centre of Västmanland reads Bortle 7. The nearest sky at Bortle 4 is about 36 km north-west around Skinnskattebergs kommun. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to Västmanland with reliable aurora borealis?
Bodø, Norway — 863 km north. It needs only Kp 3 and averages 171.4 viable nights a year against 21.2 in Västmanland.
Nearby towns
Forecasts for places within reach of Västmanland.