Aurora Borealis in Bracebridge

Canada · 45.03°, -79.32° · geomagnetic 54.3° · needs Kp 7

Tonight's aurora forecast for Bracebridge

2%

Peak chance of a visible display tonight, from the same model the Revon app runs. Bracebridge 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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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Bracebridge

Bracebridge 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 3.

Aurorasaurus recorded 65 verified reports within 300 km of Bracebridge 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 Bracebridge 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 Bracebridge.