Northern Lights Tonight in Thunder Bay, Ontario, Canada

Live visibility odds for Thunder Bay, combining the current geomagnetic Kp index with real local cloud cover, not just one or the other.

What Kp do you need in Thunder Bay?

Those frequencies are how often the geomagnetic threshold itself is reached, before weather. Cloud cover, moonlight and local light pollution all cut into it, which is why the live score at the top of this page multiplies the geomagnetic odds by tonight's actual sky over Thunder Bay.

Which way to look from Thunder Bay

Face north. From Thunder Bay the auroral oval sits well to the north, so activity shows up as a glow low on the northern horizon rather than overhead — which means a clear, unobstructed northern view matters more here than total darkness does.

About aurora viewing in Thunder Bay

Thunder Bay sits on Lake Superior's north shore, directly across the lake from Michigan's Upper Peninsula, with the same dark-sky, low-light-pollution advantages as its American counterparts.

Where locals actually go

Sleeping Giant Provincial Park, just outside the city, offers dramatic lakeside cliffs alongside genuinely dark sky.

Best time of year

Clear winter nights along the north shore give Thunder Bay some of the best viewing odds in Ontario.

Will I see the aurora in Thunder Bay tonight?

Right now, Thunder Bay has a 36% chance based on tonight's real conditions: Kp 3.3 and 75% clear skies. Camera only (long exposure). This updates live, so check back closer to dark for the most accurate read, especially if the sky is currently cloudy where you are.

A good Kp forecast isn't the whole story. See what else actually determines whether you'll see it →