Northern Lights Possible Over Toronto & 18 US States Tonight for Labour Day

Get ready, skywatchers. A significant solar event could bring the ethereal dance of the Northern Lights to skies across much of southern Canada and a large portion of the United States this Labour Day.

A “full-halo” coronal mass ejection (CME), a massive eruption of solar material from the sun’s surface on Saturday, is heading towards Earth. Its arrival is expected to trigger a geomagnetic storm late Monday into early Tuesday, potentially making the aurora borealis visible to millions.

Where and When to Look Up

The National Oceanic and Atmospheric Administration (NOAA) has issued a Geomagnetic Storm Watch, predicting the storm could reach moderate to strong levels. This increases the likelihood of the aurora appearing much farther south than usual.

For those in “the 6ix” and across southern Ontario, the best chance will be to find a spot away from city light pollution and look towards the northern horizon. The peak viewing time is anticipated between 10 p.m. and 2 a.m. local time on Monday night.

The light show isn’t just a local affair. The forecast includes a vast area, with a strong possibility of sightings across Canada. In the United States, 18 states are on the watch list, including Washington, Montana, North Dakota, Minnesota, Wisconsin, Michigan, Illinois, New York, and Maine, among others.

What’s Causing This Celestial Event?

This potential display is thanks to a powerful burst from the sun. The “full-halo” CME means the eruption expanded outward in all directions, looking like a halo around the sun. When these charged particles slam into Earth’s magnetic field, they interact with gases in our atmosphere. These interactions release energy in the form of light, creating the green and purple waves we know as the Northern Lights.

Scientists have noted that the sun is currently in a period of high activity, known as a “solar maximum.” This phase, expected to continue into 2026, means more frequent solar flares and CMEs, and consequently, more opportunities to witness the aurora.

Tips for the Best Viewing Experience

To give yourself the best shot at seeing the lights, here are a few suggestions:

Escape the City: Head away from the light pollution of Toronto. Parks, conservation areas, or even just a drive north can make a huge difference.
Find a High Point: An elevated spot with an unobstructed view of the northern horizon is ideal.
Be Patient: It can take some time for your eyes to adjust to the dark. Plan to be outside for a while.

For those looking to capture the moment, photography experts suggest using a camera with a wide-angle lens and a low aperture. For smartphone users, enabling night mode, turning off the flash, and using a tripod for stability can yield impressive results.

This Labour Day could offer a fantastic natural spectacle. Will you be heading out to look for the Northern Lights? Let us know your plans or share your photos in the comments below!

Looking for more ways to light up the long weekend? If the aurora proves elusive, you can still catch a guaranteed sky show. Check out our complete guide to all the Labour Day 2025 fireworks happening in Toronto!

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