Aurora Borealis in Cranbrook

Canada · 49.50°, -115.77° · geomagnetic 55.8° · needs Kp 7

Tonight's aurora forecast for Cranbrook

7%

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

Tonight Mon 07 Sep
7%
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Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Cranbrook

Cranbrook is located at 55.8° geomagnetic latitude. Auroras are typically visible when the planetary Kp index reaches 7.

With an average of 3.1 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 Cranbrook are May, August, and September. These months offer a good balance of darkness and potential aurora activity.

June experiences no full darkness due to extended twilight, which can impact viewing conditions.

Cranbrook has a Bortle rating of 3, indicating a dark sky environment. Areas 1 km east of Cranbrook also maintain a Bortle 3 rating.

The horizon features include Sylvan Lake to the east-northeast, Pattons Lake to the north, Lone Pine Hill to the north-northwest, Norbury Lake Park to the east, and Lone Peak to the north-east.

Nearby natural features that may offer viewing opportunities include Sylvan Lake, located 3.9 km east-northeast of Cranbrook.

Further afield, Pattons Lake is situated 4.9 km north of Cranbrook.

Lone Pine Hill is 18.7 km north-northwest, Norbury Lake Park is 20.8 km east, and Lone Peak is 22.1 km north-east of Cranbrook.

There have been 95 verified aurora reports within 300 km of Cranbrook 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).

Additional qualifying nights occurred on November 12, 2025 (Kp 7.33) and November 11, 2025 (Kp 8.67).

Sources: Revon location dataset · 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 Cranbrook 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 Cranbrook.