Northern lights Glacier National Park tonight
Glacier National Park in Montana sits at ~56°N magnetic latitude and needs only Kp 2 - the same threshold as Tromsø, Norway. Aurora appears several dozen times per year when skies are clear. Many Glacier Valley, Lake McDonald, and Two Medicine Lake all give Bortle 2 dark sky with dramatic mountain and water foregrounds. The park's International Dark Sky designation covers the entire 4000 km² interior. Best season: September to April.
Aurora visibility - Glacier National Park
Low chance tonight
Kp 1 is below the threshold for Glacier National Park. Activity would need to rise to Kp 2–3 before aurora could reach this latitude.
Current Kp
1
of 9
7-day outlook for Glacier National Park
Today
3 Jun
Tomorrow
4 Jun
Fri
5 Jun
Sat
6 Jun
Sun
7 Jun
Mon
8 Jun
Tue
9 Jun
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Glacier National Park 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 2–3 before the auroral oval expands far enough south to be visible from here.
At Kp 2–3, visibility is possible from Glacier National Park but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Glacier National Park
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Many Glacier Valley
Get directions ↗On the park's east side near Babb, the Many Glacier Valley faces north across the Swiftcurrent Lake chain toward the Canadian border. At 48.8°N geographic and surrounded by peaks rising to 3000 m, the valley gives a dramatic mountain foreground with Bortle 2 conditions. The north-facing opening of the valley channels the view directly toward the auroral oval. Many Glacier Hotel and the Swiftcurrent Motor Inn both give lakeside positions. The valley road typically closes in autumn but camping and lodge access extends into September. One of the most photographed aurora locations in the park.
Lake McDonald - west side
Get directions ↗The largest lake in the park, on the west side near the Apgar Village. Lake McDonald gives a long open reflection surface facing northwest with the Garden Wall peaks behind. The north end of the lake near Apgar gives the best sky access with the mountains as backdrop. Bortle 2-3. Accessible year-round from Apgar Village on US-2. The lake's glassy surface in calm conditions gives lake-reflection photography opportunities. The west side of the park near West Glacier is accessible when Going-to-the-Sun Road is closed.
Two Medicine Valley
Get directions ↗A quieter valley on the southeast corner of the park near East Glacier. Two Medicine Lake faces northwest with the Lewis Range as backdrop. Bortle 2. Less visited than Many Glacier but equally dark. The valley access road closes in winter. The combination of the lake, the peaks, and the north-facing position makes Two Medicine an excellent aurora photography location during the September-October shoulder season before the road closes.
Glacier rim / Chief Mountain International Highway (US-89)
Get directions ↗The approach road to Many Glacier along US-89 north of Babb passes through open prairie that faces directly north toward the Canadian border with Chief Mountain as a distinctive landmark. At 48.9°N geographic and with 360-degree open sky on the prairie approach, this corridor gives excellent aurora access even when park campgrounds are full. The Saint Mary Lake area at the east park entrance gives similar conditions with lake foreground.
Best time to see the northern lights in Glacier National Park
At 56°N magnetic latitude, Glacier National Park has one of the longest aurora seasons in the world. Meaningful darkness returns in late August and displays are possible on almost any clear night from September through March. Only the endless daylight of May, June, and July rules out viewing completely.
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 Glacier National Park's latitude.
May through July is effectively impossible for aurora viewing: the midnight sun keeps the sky bright around the clock at this latitude. No storm level, not even G5, can produce a visible display without astronomical darkness.
Compare nearby locations
Up to 4 locations
Related pages
Northern Lights USA
USA-wide aurora forecast hub.
Northern Lights Montana Tonight
Montana state overview - Glacier NP and the northern Rockies.
Northern Lights Whitefish Tonight
Whitefish - Glacier NP gateway, Lake McDonald and Going-to-the-Sun Road.
Northern Lights Idaho Tonight
Idaho - Craters of the Moon Dark Sky Park, similar mountain west.
What Is the Kp Index?
What Kp 2 means for viewing at 56°N magnetic latitude.
Aurora photographs from Glacier National Park
Common questions
Aurora at Glacier NP - Many Glacier, Lake McDonald, best season, and how it compares to Whitefish and the Montana state page.


