Northern Lights in WisconsinVisible Tonight?
Real-time aurora forecast updated every 15 minutes
Kp 2.3 is well below the Kp 5 that Wisconsin needs, so the aurora stays too far north tonight.
Verify with the live sky camera →Tuesday night looks better: Kp 4.0 forecast with 45% cloud, a camera chance.
Tonight, Hour by Hour
The four things that must line up over Wisconsin, and how each hour of the night looks.
Kp 2.3 now, Kp 5 needed here
100% cloud cover around 10 PM
Dark from 11 PM
Dark rural skies; moon 3% lit
All times shown in Wisconsin local time (CDT), not your device time.
10-Night Aurora Outlook
Planning a trip to Wisconsin? Peak activity, cloud cover, and darkness for the nights ahead.
Kp ~ marks nights beyond NOAA's precise 3-day forecast, estimated from the 27-day outlook. Treat the far nights as a rough guide, not a promise.
Seeing the aurora in Wisconsin
Wisconsin's best shot at the northern lights is the far-north Lake Superior shore, and the Bayfield Peninsula and Apostle Islands are why. Up here the state shares the same latitude band as Michigan's Upper Peninsula, so at Kp 5 the aurora can climb high enough to dance over the dark water. Farther south, from Door County to Milwaukee, you generally need a stronger storm.
Our verdict is not a Kp number. The Kp index is a global, three-hour average, and treating it as a promise is the single biggest reason people drive out and see nothing. Instead we check four things for Wisconsin specifically: whether forecast activity reaches the level this latitude needs, whether the sky will be clear, whether it will actually be dark, and how much moonlight and local light pollution will wash out. Only when all four line up do we say yes.
When to go: aurora season in Wisconsin
Aurora season in Wisconsin runs from late August through mid April. It is not that the sun quiets down in summer: the sky over the far-north Lake Superior shore simply never gets dark enough for long enough in June and July. The strongest months are historically around the equinoxes, September, October, and March, when Earth's magnetic field connects more efficiently with the solar wind and the same activity produces bigger displays.
Through the current solar maximum the Bayfield Peninsula and Apostle Islands have been getting photographable aurora on a handful of nights in a typical month, and a few storms each year push naked-eye color as far south as Madison and Milwaukee. Those big nights are exactly what the 10-night outlook above is for: when a Kp 6 or 7 storm is coming, it usually shows up there two or three days ahead.
Where to look: the far-north Lake Superior shore
The single best thing Wisconsin has going for it is the far-north Lake Superior shore. The aurora lives on the northern horizon at this latitude, and the open water off the Bayfield Peninsula and Apostle Islands is the one horizon in the state with no towns, no trees, and no light on it. That is why the strongest Wisconsin aurora photos keep coming from the same places: Meyers Beach, the mainland sea caves, and Big Bay State Park on Madeline Island.
In the east, Door County offers the same idea on Lake Michigan. Newport State Park, the state's only International Dark Sky Park, has a dark shore at the tip of the peninsula and sits far enough from big cities to stay genuinely dark. When in doubt anywhere in the state, drive until open water fills your view north: a modest Kp 4 night that reads camera-only in town can turn into visible green pillars from a dark beach.
How to read tonight's forecast like a local
From the far-north Lake Superior shore you generally need Kp 5 for a naked-eye show and about Kp 4 for your camera to catch it; from the southern half of the state the bar rises to Kp 7 or more. Regulars know the Kp number is only the entry ticket: a clear north horizon and real darkness matter just as much, which is why the verdict above folds cloud cover and twilight into one answer instead of making you juggle three apps.
On a promising night, get out early, give it two full hours, and let your eyes dark-adapt for 15 minutes without looking at your phone. Displays arrive in substorms: bursts of 15 to 40 minutes with quiet gaps in between. Point night mode at the north horizon now and then; the camera will pick up an approaching display before your eyes do.