Aurora Borealis in Brockville

Canada · 44.59°, -75.69° · geomagnetic 53.9° · needs Kp 7

Tonight's aurora forecast for Brockville

2%

Peak chance of a visible display tonight, from the same model the Revon app runs. Brockville 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.

Tonight Tue 08 Sep
2%
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00
02
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06

Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Brockville

Brockville generally needs planetary Kp 7 before the aurora borealis reaches the local sky. Historical Kp and darkness data produce about 3.2 viable nights a year across 10.0 years of records.

The strongest historical overlap of darkness and activity occurs in May, September and August.

The central sky is approximately Bortle 6. The supplied darker-sky reference is 18 km north-north-west at Bortle 4.

Aurorasaurus recorded 66 verified reports within 300 km of Brockville between 2015-01-01 and 2016-12-31. These records describe past observations, not tonight's prediction.

Sources: Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · Aurorasaurus verified positive reports

Know when it is worth going outside

Revon watches the Brockville forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.

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Nearby towns

Forecasts for places within reach of Brockville.