Aurora Borealis in Isleworth
United Kingdom · 51.48°, -0.34° · geomagnetic 53.4° · needs Kp 7
Tonight's aurora forecast for Isleworth
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Isleworth 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 Isleworth
Isleworth is at 53.4° geomagnetic latitude.
Auroras visible at this latitude typically require a Kp of 7 or higher.
On average, there are about 2.7 nights per year with conditions suitable for aurora viewing in Isleworth.
The best months for aurora viewing in Isleworth are September, August, and November.
During June and July, there is not enough full darkness for optimal viewing.
Isleworth experiences significant light pollution, with a Bortle rating of 9.
Areas with less light pollution include Bortle 4 conditions 93 km east and Bortle 5 conditions 82 km northeast near Braintree.
Nearby terrain features include The Vale (Heston) 3.1 km west-north-west, Lot's Ait 3.2 km east-north-east, Kew Royal Botanic Gardens 3.3 km east, Brentford Ait 3.6 km east-north-east, and Kew Green 3.9 km east-north-east.
Between 2016 and 2026, there were approximately 2.7 nights per year with conditions suitable for aurora viewing.
The period from 2016-04-02 to 2026-03-30 includes qualifying nights such as 2026-03-20 (Kp 7.0), 2026-01-20 (Kp 7.67), 2026-01-19 (Kp 8.67), 2025-11-12 (Kp 7.33), and 2025-11-11 (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 Isleworth 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 Isleworth.