Aurora Borealis in Ewell
United Kingdom · 51.35°, -0.25° · geomagnetic 53.2° · needs Kp 7
Tonight's aurora forecast for Ewell
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Ewell 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 Ewell
Ewell is at a geomagnetic latitude of 53.2°.
Auroras are typically visible at this latitude when the Kp index reaches 7.
On average, there are 2.7 nights per year with aurora potential.
The best months for aurora viewing in Ewell are September, August, and November.
June and July experience too much daylight for full darkness.
Ewell has a Bortle scale rating of 9, indicating significant light pollution.
Areas with Bortle 4 conditions are located 88 km east-north-east.
Bortle 5 conditions can be found near Brighton, 69 km south-south-east.
Manor Park is a park located 4.4 km east-north-east of Ewell.
Beverley Park is a park situated 6.1 km north of Ewell.
Ravens Ait is an island 6.9 km north-west of Ewell, and Boyle Farm Island is an island 7.4 km north-west of Ewell. The Lake is a lake 8.0 km west of Ewell.
Between 2016 and 2026, there were an average of 2.7 nights per year suitable for aurora viewing.
The record span for these observations 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 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)
Know when it is worth going outside
Revon watches the Ewell 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 Ewell.