Live aurora forecast

Northern lights in Keweenaw Peninsula tonight

Michigan, USA · 57° magnetic latitude · Kp 3 threshold

Aurora visibility · Keweenaw Peninsula
1/9
Unlikely tonight

Kp 1 is well below the Kp 3 threshold needed for aurora to be visible from Keweenaw Peninsula.

QuietStormExtreme
Threshold
Kp 3
Magnetic latitude
~57°N
Bz ↓ south
- nT
Solar wind
- km/s
Density
- p/cm³
Cloud
-
Conditions right now: - Kp + Bz + solar wind + cloud + moon

Updated: 10 Jul, 12:56 UTC

7-day outlook for Keweenaw Peninsula

Today
10 Jul
1
Quiet
Tomorrow
11 Jul
3
Possible
Sun
12 Jul
3
Possible
Mon
13 Jul
3
Possible
Tue
14 Jul
3
Possible
Wed
15 Jul
3
Possible
Thu
16 Jul
3
Possible

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

auroratonight.space

What Kp is needed here?

Keweenaw Peninsula sits at a magnetic latitude of approximately 57°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 3 before the auroral oval expands far enough south to be visible from here.

At Kp 3, visibility is possible from Keweenaw Peninsula 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 Keweenaw Peninsula

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

Brockway Mountain

Get directions ↗
Bortle Class 2-3 - Excellent dark sky 1 mile west of Copper Harbor - approximately 5 minute drive

A 320-metre summit ridge above Lake Superior, 1 mile from Copper Harbor. The Brockway Mountain Drive follows the crest - pull off anywhere along the ridge for panoramic views. The north face looks directly out over Lake Superior with no light sources between the overlook and the Canadian shore. One of the best aurora viewpoints in the continental USA - the elevation is sufficient to clear the tree line and the dark lake horizon stretches from east to west below. The road is typically open May through November.

Fort Wilkins State Park

Get directions ↗
Bortle Class 2-3 - Excellent dark sky 1 mile east of Copper Harbor - approximately 5 minute drive

A historic copper-era fort on a narrow strip between Lake Superior and Lake Fanny Hooe, 1 mile east of Copper Harbor. The north shore of the fort peninsula faces open Lake Superior. The sandy beach gives a flat horizon and the absence of any settlement to the north means the sky is genuinely dark. A well-maintained state park with camping - a convenient base for multi-night aurora watches.

McLain State Park

Get directions ↗
Bortle Class 3 - Rural sky 30 miles south-west of Copper Harbor - approximately 45 minute drive

On the north shore of the Keweenaw Bay near Hancock, 30 miles south-west of the tip. The park beach faces north-west across the bay with very low light pollution. A popular aurora watch location for visitors staying in Houghton or Hancock rather than driving the full length of the peninsula to Copper Harbor.

Copper Harbor village

Get directions ↗
Bortle Class 2-3 - Excellent dark sky At the northern tip of the peninsula

The small village at the northern tip of the Keweenaw Peninsula has a population of around 100. Street lighting is minimal and the harbour faces north over Lake Superior. The boat launch at the end of Gratiot Street gives a direct lake-horizon view to the north. For sheer convenience - no walk required, car park by the water, toilet facilities nearby - this is the starting point most aurora observers use before choosing a final position.

When to go

Best time to see the northern lights in Keweenaw Peninsula

Keweenaw Peninsula'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 Keweenaw Peninsula'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

Unlikely
Kp 1 need Kp 3
Checking darkness…
Michigan

USA

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

USA

Unlikely
Kp 1 need Kp 4
Checking darkness…
The odds

How often does the aurora appear in Keweenaw Peninsula?

Average nights per month the Kp reached Keweenaw Peninsula's threshold of 3+, from 15 years of geomagnetic data (2010–2024).

10.2Jan
11.2Feb
13.6Mar
12.4Apr
10.7May
9Jun
10.1Jul
12.3Aug
13.2Sep
12.8Oct
10.3Nov
9.3Dec

Counts the Kp 3+ 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 Keweenaw Peninsula

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

1st
March
13.6
avg aurora nights
Stay 3+ nights for 80% chance
2nd
September
13.2
avg aurora nights
Stay 3+ nights for 80% chance
3rd
October
12.8
avg aurora nights
Stay 4+ nights for 80% chance

Best window

The August to October window averages 38 aurora nights - the strongest consecutive stretch of the year.

How long to stay

For your best chance in March, plan at least 3 nights.

Questions

Common questions about aurora in Keweenaw Peninsula

Why is the Keweenaw Peninsula good for aurora?
Two reasons: latitude and dark sky. At 57° magnetic latitude - higher than anywhere else in the continental USA except Alaska and the extreme north of Montana - the Keweenaw Peninsula sits inside the auroral oval during Kp 3 events. Kp 3 occurs on many nights during solar maximum. Add Bortle 2 conditions on Brockway Mountain and a flat Lake Superior horizon to the north, and the result is one of the best aurora viewing positions in the lower 48 states.
What Kp is needed for aurora on the Keweenaw Peninsula?
Kp 3 from Brockway Mountain and the north shore of Copper Harbor. The Kp index is a global measure of geomagnetic activity on a scale from 0 to 9, updated every 3 hours. At 57° magnetic latitude, the Keweenaw sits at the equatorward edge of the auroral oval during moderate activity. Kp 3 events occur on roughly 50 to 70 nights per year during solar maximum - the limiting factor here is cloud cover and the drive north, not geomagnetic activity.
What is Brockway Mountain and why is it the best viewpoint?
Brockway Mountain is a 320-metre ridge above Lake Superior at the northern tip of the Keweenaw Peninsula, with a drive road running along the crest. The north face is a clear drop to the lake below - no trees blocking the horizon. The elevation puts observers above the atmospheric boundary layer on hazy nights. The road runs along the ridge, making it easy to reposition or shelter in a vehicle. It is often described as the best single aurora viewpoint in the continental USA south of Alaska.
How do I get to the Keweenaw Peninsula?
The Keweenaw Peninsula is in Michigan's Upper Peninsula, reached by driving north on US-41 from Houghton - about 45 miles to Copper Harbor. Houghton has a small regional airport (CMX) with connections via Detroit or Chicago. The nearest larger airports are Green Bay (GRB) and Milwaukee (MKE), both around 5 hours by road. The drive up US-41 through the copper country is itself a worthy excursion in autumn.
When is the aurora season on the Keweenaw Peninsula?
September to April. The Keweenaw gets substantial snow from November onward - often 300 inches or more per season due to Lake Superior lake-effect snow. Winter aurora watches are entirely feasible but require proper cold-weather preparation. October is generally the most reliable month for aurora frequency combined with reasonable road conditions. The spring equinox (March) is statistically one of the most geomagnetically active periods of the year.
Photograph the aurora

Recommended gear

Tested picks for capturing the aurora on long, cold nights.

As an Amazon Associate, Aurora Tonight earns from qualifying purchases. Affiliate links never influence the forecast or which gear is recommended.

Aurora Tonight

Aurora Tonight

Add to your home screen for instant aurora alerts

Add to your home screen

Tap then Add to Home Screen for instant aurora alerts