Live aurora forecast

Northern lights in Wisconsin tonight

Northern Wisconsin, USA · 56° magnetic latitude · Kp 4–5 threshold

Aurora visibility · Wisconsin
1/9
Unlikely tonight

Kp 1 is well below the Kp 4–5 threshold needed for aurora to be visible from Wisconsin.

QuietStormExtreme
Threshold
Kp 4–5
Magnetic latitude
~56°N
Bz ↓ south
- nT
Solar wind
- km/s
Density
- p/cm³
Cloud
-
Conditions right now: - Kp + Bz + solar wind + cloud + moon

Updated: 26 Jun, 01:59 UTC

7-day outlook for Wisconsin

Today
26 Jun
1
Quiet
Tomorrow
27 Jun
3
Unlikely
Sun
28 Jun
3
Unlikely
Mon
29 Jun
3
Unlikely
Tue
30 Jun
3
Unlikely
Wed
1 Jul
3
Unlikely
Thu
2 Jul
3
Unlikely

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

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What Kp is needed here?

Wisconsin sits at a magnetic latitude of approximately 56°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 4–5 before the auroral oval expands far enough south to be visible from here.

At Kp 4–5, visibility is possible from Wisconsin but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Plan your viewing

Best dark sky sites near Wisconsin

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Apostle Islands National Lakeshore

Get directions ↗
Bortle Class 2 - Excellent dark sky 95 km from Ashland - approximately 90 minute drive

Twenty-one islands off the Bayfield Peninsula on Lake Superior, about 90 km west of Ironwood on US-2. The north-facing lake shore of Madeline Island and the mainland unit at Little Sand Bay face directly north across Lake Superior with no horizon obstruction. Bortle 2-3 at the outer island positions. The combination of open water reflection and genuine darkness makes the Apostle Islands shoreline one of Wisconsin's best aurora positions. The Lakeshore drive north of Bayfield gives accessible mainland positions.

Nicolet-Chequamegon National Forest

Get directions ↗
Bortle Class 3 - Rural sky, good dark sky 70 km from Rhinelander - approximately 75 minute drive

A large national forest covering much of northern Wisconsin between Rhinelander and Ashland. The forest interior gives Bortle 3-4 conditions away from the highway towns. Open boggy areas and lake clearings give north-facing sky. The Chequamegon side near Mellen and Cable is darker and further from light domes. North-facing lake shores within the forest - Trout Lake, Crystal Lake, and Namekagon Lake - give practical aurora positions without driving to the Lake Superior shore.

Copper Falls State Park and surroundings

Get directions ↗
Bortle Class 3 - Rural sky, good dark sky 60 km from Ashland - approximately 60 minute drive

A state park in Mellen, 60 km south of Ashland, surrounded by national forest and with minimal local light pollution. The park gives north-facing sky without the drive to Lake Superior. The broader Penokee Range area between Hurley and Mellen sits at modest elevation with open ridges. Combined with the Chequamegon Forest to the east, northern Wisconsin has a continuous band of dark sky across its upper tier, accessible from US-2 and Highway 51.

When to go

Best time to see the northern lights in Wisconsin

Wisconsin's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.

Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Wisconsin's latitude.

April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.

Up to 8 locations

Wisconsin

USA

Unlikely
Kp 1 need Kp 4-5
Checking darkness…
Minnesota

USA

Unlikely
Kp 1 need Kp 4-5
Checking darkness…
Michigan

USA

Unlikely
Kp 1 need Kp 4-5
Checking darkness…
The odds

How often does the aurora appear in Wisconsin?

Average nights per month the Kp reached Wisconsin's threshold of 4+, from 15 years of geomagnetic data (2010–2024).

3.9Jan
4.2Feb
5.2Mar
4.7Apr
4May
3.4Jun
3.8Jul
4.7Aug
5Sep
4.8Oct
3.9Nov
3.5Dec

Counts the Kp 4+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0

Make it happen

Plan your trip to Wisconsin

Based on 15 years of geomagnetic data (2010–2024)

1st
March
5.2
avg aurora nights
Stay 9+ nights for 80% chance
2nd
September
5.0
avg aurora nights
Stay 9+ nights for 80% chance
3rd
October
4.8
avg aurora nights
Stay 10+ nights for 80% chance

Best window

The August to October window averages 15 aurora nights - the strongest consecutive stretch of the year.

How long to stay

For your best chance in March, plan at least 9 nights.

From the community

Aurora photographs from Wisconsin

Real photos sourced from Wikimedia Commons.

Aurora over Wisconsin Aurora over Wisconsin
Aurora over Wisconsin Aurora over Wisconsin
Aurora over Wisconsin Aurora over Wisconsin
Aurora over Wisconsin Aurora over Wisconsin
Questions

Common questions about aurora in Wisconsin

Can you see the northern lights in Wisconsin?
Yes, during moderate geomagnetic storms. Northern Wisconsin at ~56°N magnetic latitude needs Kp 4-5 from dark sites - the Apostle Islands lakeshore, Nicolet-Chequamegon National Forest, and the Lake Superior south shore. During G2-G3 storms (Kp 5-6), aurora is visible across northern Wisconsin. The May 2024 G5 storm produced widespread Wisconsin sightings as far south as Madison.
What Kp is needed for aurora in Wisconsin?
Kp 4 from the Apostle Islands and the Lake Superior shore. Kp 5 for aurora visible from Rhinelander or Wausau. Kp 6 for visibility from Madison or Milwaukee. Northern Wisconsin at 56°N magnetic latitude is comparable to northern Minnesota - the threshold is similar, but Wisconsin's Lake Superior coast gives better north-facing dark sky access than equivalent inland Minnesota positions.
Where is the best place to see aurora in Wisconsin?
The Apostle Islands National Lakeshore near Bayfield gives the best combination of darkness, north-facing horizon, and accessibility. The Little Sand Bay mainland unit faces north across Lake Superior. Madeline Island gives an even darker position accessible by ferry. The Nicolet-Chequamegon National Forest is the best inland option - lake clearings near Cable and Mellen give Bortle 3-4 sky without driving to the lake.
Has aurora been seen from Wisconsin?
Yes, repeatedly. The May 2024 G5 storm produced aurora photographed across Wisconsin including from Milwaukee and Madison. G2-G3 storms produce regular sightings from the Apostle Islands and Lake Superior shore. Northern Wisconsin is one of the better lower-48 aurora states because of the Lake Superior open water horizon and the low light pollution of the Chequamegon forest region.
How does Wisconsin compare to Minnesota for aurora?
The thresholds are comparable - both states sit at ~56°N magnetic latitude. Minnesota has more extensive wilderness area (the Boundary Waters) with darker sky at the remotest sites. Wisconsin's Apostle Islands give an equivalent open-water north-facing position to Minnesota's Lake Superior shore but with ferry island access for an extra degree of darkness. For most aurora events, both states see the same display simultaneously.
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