Aurora Borealis in Green Bay
United States · 44.52°, -88.02° · geomagnetic 53.5° · needs Kp 7
Tonight's aurora forecast for Green Bay
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Green Bay needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.7. 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 Green Bay
Green Bay is located at 53.5° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 7 or higher.
On average, there are about 3.2 nights per year in Green Bay where conditions are suitable for aurora viewing.
The record span for these observations is from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Green Bay are May, September, and August.
These months offer a good overlap between the darker periods suitable for aurora observation and the historical likelihood of viewing opportunities.
Green Bay has a Bortle scale rating of 6, indicating moderate light pollution.
Areas with darker skies, such as near the Town of Union (Bortle 4) or the Town of Montpelier (Bortle 5), are located to the north-east and east respectively.
Local areas like Perkins Park, Bay Beach Park, Birds Tree Island, Grassy Island, and Peats Lake offer varied horizons.
Perkins Park is a park located to the north-west of Green Bay.
Bay Beach Park is a park situated to the east-north-east of Green Bay.
Birds Tree Island and Grassy Island are islands located to the north-east of Green Bay. Peats Lake is a bay to the north of Green Bay.
Between January 1, 2015, and December 31, 2016, there were 141 verified aurora reports within 300 km of Green Bay.
Notable qualifying nights with high Kp values 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 location dataset · Revon analysis of NOAA planetary Kp · 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 Green Bay 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 Green Bay.