Aurora Borealis in Ajax
Canada · 43.85°, -79.03° · geomagnetic 53.1° · needs Kp 7
Tonight's aurora forecast for Ajax
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Ajax 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 10:35 UTC
Local aurora guide for Ajax
Aurora activity is measured by the Kp index. A Kp of 7 is considered a strong geomagnetic storm.
Ajax is at a geomagnetic latitude of 53.1 degrees. This latitude is favourable for aurora viewing.
On average, there are 3.2 nights per year with sufficient aurora activity for viewing.
The best months for aurora viewing in Ajax are May, August, and September.
These months offer a good balance of darkness and potential aurora activity.
Ajax experiences significant light pollution, with a Bortle scale rating of 9.
Areas to the east-south-east, approximately 44 km away, have a Bortle rating of 4.
Near Clarington, 28 km to the north-east, the Bortle rating is 5.
Thicksons Point is a headland located 10.7 km east of Ajax.
Gold Point, another headland, is situated 13.4 km east of Ajax.
Samac Lake, a lake, is found 15.8 km north-east of Ajax.
There have been 66 verified aurora sightings reported within 300 km of Ajax between 2015 and 2016.
The period from 2016 to 2026 has recorded several nights with significant aurora activity, including Kp 7.0 on March 20, 2026, and Kp 8.67 on January 19, 2026.
Sources: 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
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Nearby towns
Forecasts for places within reach of Ajax.