Aurora Borealis in Maine
United States · 43.89°, -70.13° · geomagnetic 53.2° · needs Kp 7
Tonight in Maine
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Maine needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 5.1. Short of the threshold, which is what most nights look like here.
Updated 2026-08-02 20:20 UTC
The next 30 nights in Maine
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 1%. Not one of the seven reaches the Kp 7 that Maine needs, which is normal rather than unlucky — it averages 3.2 viable nights a year. The 23 nights past the seven-day window move with the 27-day solar rotation and are updated daily in the app.
Nights 8–30 unlock in the Revon app
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches Maine
3.2 nights a year, averaged across 10.0 years of records
| Storm level | Nights / year |
|---|---|
| Kp 4 | 83.4 |
| Kp 5 | 28.7 |
| Kp 6 | 9.3 |
| Kp 7 | 3.2 |
| Kp 8 | 1.2 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
Wait for an alert; do not book a week
At Kp 7, Maine needs a severe geomagnetic storm before anything shows above the northern horizon. Storms that size arrive a handful of times per solar cycle and announce themselves a day or two ahead. Watching for one beats picking dates and hoping.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11.3 | 10.3 | 9.0 | 7.1 | 5.1 | 3.8 | 4.4 | 6.3 | 8.3 | 9.9 | 11.1 | 11.6 |
Solar declination and hour angle at −18°
Getting clear of the light
With 365,066 people around you, the sky over central Maine is Bortle 6. The glow hides anything but the brightest display, so the drive out matters more here than the forecast does.
- 17 km north-east — around Topsham → Bortle 4
- 17 km north-east — around Topsham → Bortle 4
Falchi 2016 World Atlas (DOI: 10.5880/GFZ.1.4.2016.001)
The months that actually deliver
Counting only nights that were both stormy enough and dark enough, May, September and August came out ahead in Maine. That is storm season and darkness overlapping — the equinoxes tend to be geomagnetically active, and the nights are already long by then.
Darkest nights of the coming year
A bright moon washes out a weak display as effectively as street lighting. These new moons fall inside the Maine viewing season.
- 13 Aug 2026
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 2027
Where it is close to a certainty
If you would rather plan a trip than wait for a storm, the nearest place with genuinely frequent aurora is Nuuk, 2,536 km north-north-east in Greenland.
| Maine | Nuuk | |
|---|---|---|
| Kp needed | 7 | 3 |
| Nights per year | 3.2 | 171.4 |
| Geomagnetic latitude | 53.2° | 72.6° |
Confirmed reports from this area
98 verified sightings were logged within 300 km of Maine between 2015-01-01 and 2016-12-31. Rare is not the same as impossible.
Aurorasaurus verified positive reports
Where the horizon opens up near Maine
The display sits low on the northern horizon, so what beats a better forecast is open ground facing that way. Height gets you above the town glow; water gives you an unbroken skyline. These are within a short drive of Maine.
- Florida Lake — lake4.3 km east-north-east
- Bradbury Mountain — mountain4.5 km west-north-west
- Bradbury Mountain State Park — park4.5 km west-north-west
- Bibber Hill — mountain4.8 km north-west
- Coffin Pond — lake12.1 km east-north-east
- Lincoln Street Historic District — park13.6 km east-north-east
Places from GeoNames (CC BY 4.0)
What to do with the daylight
Aurora watching is a night job, and in winter that leaves a short, bright day to fill. Close to Maine you will find WGEI-FM (Topsham), WCLZ-FM (Brunswick) and WCLZ-AM (Brunswick), and for a day when the cloud sits low, Bowdoin College Museum of Art, Peary-MacMillan Arctic Museum and Joshua L Chamberlain Museum are indoors and near by.
Keep the daylight loose: the sky decides the evening, and the forecast can turn within a few hours.
Places from GeoNames (CC BY 4.0)
Where to stay
Staying central in Maine is fine for everything except the aurora itself — you will still need to drive out. If seeing it matters more than convenience, base yourself on the edge of town facing your dark spot.
- Fairfield Inn And Stes Brunswck 10.6 km from the centre
- Fairfield Inn & Suites Brunswick Freeport 10.7 km from the centre
- Econo Lodge Brunswick 11.5 km from the centre
- Comfort Inn Brunswick 11.5 km from the centre
- Maineline Motel Brunswick 12.3 km from the centre
- Travelers Inn 12.3 km from the centre
Places from GeoNames (CC BY 4.0) — confirm before booking
The last nights it was visible here
Nights in the last decade when the storm was strong enough for Maine and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-20 | Kp 7.0 |
| 2026-01-20 | Kp 7.67 |
| 2026-01-19 | Kp 8.67 |
| 2025-11-12 | Kp 7.33 |
| 2025-11-11 | Kp 8.67 |
NOAA planetary Kp
Aurora forecasts across Maine
All 7 places in Maine with a forecast page, and the Kp each one needs.
Know when it is worth going outside
Revon watches the Maine forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Maine
Can you see the aurora borealis from Maine?
Yes. On the last 10.0 years of NOAA Kp records, Maine had about 3.2 nights a year when the storm was strong enough and the sky dark enough at the same time.
What Kp index do you need to see the aurora borealis in Maine?
Kp 7. Maine sits at geomagnetic latitude 53.2°, and the auroral oval only reaches that far from the pole once activity hits Kp 7. Storms that size occur about 3.2 nights a year.
When is the best time of year to see the aurora borealis in Maine?
May, September and August. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness.
Where can you escape the light pollution near Maine?
The centre of Maine reads Bortle 6. The nearest sky at Bortle 4 is about 17 km north-east around Topsham. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to Maine with reliable aurora borealis?
Nuuk, Greenland — 2,536 km north-north-east. It needs only Kp 3 and averages 171.4 viable nights a year against 3.2 in Maine.
Nearby towns
Forecasts for places within reach of Maine.