Aurora Borealis in Duncan
Canada · 48.78°, -123.70° · geomagnetic 54.1° · needs Kp 7
Tonight's aurora forecast for Duncan
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Duncan 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 10:35 UTC
Local aurora guide for Duncan
Auroras are typically visible here when the geomagnetic activity reaches Kp 7.
At Duncan's geomagnetic latitude of 54.1°, this level of activity occurs on an average of 3.1 nights per year.
Patience may be required for viewing opportunities.
The best months for aurora viewing in this region are May, September, and August.
June experiences no full darkness, which can impact viewing conditions.
Duncan is classified as Bortle 6, indicating moderate light pollution.
Darker skies, Bortle 4, can be found approximately 22 km west near Area F (Cowichan Lake South / Skutz Falls).
Areas with Bortle 5 skies are located about 15 km east-south-east near Salt Spring Island Electoral Area.
Quamichan Lake is located 3.7 km east-north-east of Duncan.
Sollys Lake is situated 7.2 km north of Duncan.
Mount Prevost is a mountain 7.4 km north-west of Duncan, and Mount Richards is a mountain 7.5 km north of Duncan.
Records indicate 3.1 viable aurora nights per year based on historical data from 2016 to 2026.
There have been 54 verified aurora sightings reported within 300 km between January 1, 2015, and December 31, 2016.
Notable qualifying nights with high Kp values include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), and January 19, 2026 (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 Duncan 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 Duncan.