Aurora Borealis in Brunswick
United States · 43.91°, -69.97° · geomagnetic 53.3° · needs Kp 7
Tonight's aurora forecast for Brunswick
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Brunswick needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 5.0. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:36 UTC
Local aurora guide for Brunswick
Brunswick is at a geomagnetic latitude of 53.3 degrees. Auroras are typically visible at this latitude during periods of high geomagnetic activity, specifically when the Kp index reaches 7 or higher.
On average, there are about 3.2 nights per year in Brunswick where conditions are favorable for aurora viewing, based on historical data spanning from 2016 to 2026.
The best months for aurora viewing in Brunswick are May, August, and September. These months generally offer darker skies, increasing the chances of observing the aurora.
Brunswick has a Bortle scale rating of 4, indicating a relatively dark sky. Areas near Topsham, approximately 10 km to the north-northwest, also fall within Bortle 4.
The horizon in Brunswick is varied, with features such as Driscoll Island to the east, Topsham Ponds to the east-northeast, and Cornish Island also to the east-northeast. To the west-northwest, Rocky Hill is present, and Bald Rock is situated 8.0 km to the west.
Geographic features near Brunswick include Driscoll Island, an island located 3.8 km to the east. Topsham Ponds, a lake, is situated 4.3 km to the east-northeast.
Further east-northeast is Cornish Island, another island. To the west-northwest, Rocky Hill offers a mountainous terrain 4.6 km away. Bald Rock, also a mountain, is located 8.0 km to the west of Brunswick.
Records indicate 97 verified aurora sightings within a 300 km radius of Brunswick between January 2015 and December 2016, according to Aurorasaurus.
Historically, qualifying nights for aurora viewing in Brunswick, based on Kp index, include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), January 19, 2026 (Kp 8.67), November 12, 2025 (Kp 7.33), and November 11, 2025 (Kp 8.67).
Sources: Revon analysis of NOAA planetary Kp · Revon location dataset · Falchi 2016 World Atlas of artificial night sky brightness · GeoNames (CC BY 4.0) · Aurorasaurus verified positive reports
Know when it is worth going outside
Revon watches the Brunswick forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Nearby towns
Forecasts for places within reach of Brunswick.