Aurora Borealis in Farnworth
United Kingdom · 53.55°, -2.40° · geomagnetic 55.7° · needs Kp 7
Tonight's aurora forecast for Farnworth
9%
Peak chance of a visible display tonight, from the same model the Revon app runs. Farnworth needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.9. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:36 UTC
Local aurora guide for Farnworth
Farnworth is at a geomagnetic latitude of 55.7°.
Auroras visible at this latitude typically require a Kp of 7.
On average, there are 2.7 nights per year with aurora potential.
The best months for aurora viewing in Farnworth are September, August, and November.
During May, June, and July, there is no full darkness.
Farnworth has a Bortle scale rating of 7.
Areas with darker skies, rated Bortle 4, can be found 50 km north near Ribble Valley.
The horizon is varied, with hills and peaks to the west and north.
Top o' Cow, a hill 4.1 km west of Farnworth, offers a western horizon.
Affetside, a hill 7.9 km north-northeast, and Harcles Hill, a peak 11.8 km north-northeast, are also nearby.
Further north-northwest is The Island, an island 12.7 km away, and Bull Hill, a mountain 13.1 km north-northeast.
Between 2016 and 2026, there were 2.7 viable aurora nights per year.
The record span for this data is from April 2, 2016, to March 30, 2026.
Notable qualifying nights 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)
Know when it is worth going outside
Revon watches the Farnworth 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 Farnworth.