Aurora Borealis in Sudbury
United Kingdom · 52.04°, 0.73° · geomagnetic 53.8° · needs Kp 7
Tonight's aurora forecast for Sudbury
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Sudbury needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.9. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Sudbury
Sudbury is located at 53.8° geomagnetic latitude. Auroras are typically visible at this latitude when the Kp index reaches 7.
With an average of 2.7 viable nights per year, aurora viewing requires patience. The record span for observations is from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Sudbury are September, August, and November. These months offer a good balance of darkness and potential aurora activity.
During June and July, there is no full darkness, which significantly reduces the chances of seeing the aurora.
Sudbury experiences a Bortle 5 sky, indicating moderate light pollution. Areas with Bortle 4 conditions are located 53 km to the east.
Closer to Bortle 5 conditions, near Babergh, are found 5 km to the south-south-east.
Notable terrain features that may affect viewing include Great Wood to the north-north-west, Wattisham Airfield to the east-north-east, and The Island to the west-north-west.
Great Wood, a hill located 16.8 km north-north-west of Sudbury, offers potential viewing opportunities.
Wattisham Airfield, situated 18.3 km east-north-east of Sudbury, is another area with elevated terrain.
The Island, an island 23.1 km west-north-west of Sudbury, and Chantry Park, a park 26.5 km east of Sudbury, are also noted geographic features.
Historical records show 53 verified aurora sightings within 300 km of Sudbury between January 1, 2015, and December 31, 2016.
The period from 2016 to 2026 includes several nights with high Kp values conducive to aurora viewing. Notable dates include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), and January 19, 2026 (Kp 8.67).
Additional qualifying nights within this span include November 12, 2025 (Kp 7.33) and November 11, 2025 (Kp 8.67).
Sources: Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · 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 Sudbury 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 Sudbury.