Aurora Borealis in Alton
United Kingdom · 51.15°, -0.97° · geomagnetic 53.2° · needs Kp 7
Tonight's aurora forecast for Alton
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Alton 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 Alton
The aurora borealis is visible at Kp 7, which occurs on average 2.7 nights per year in Alton.
Alton is located at 53.2° geomagnetic latitude.
The best months for viewing are September, August, and November.
June and July do not have full darkness.
Alton has a Bortle 7 rating for light pollution.
Areas with Bortle 4 and 5 ratings are available 72 km south and 25 km south-west respectively.
Local terrain includes hills, parks, and ridges to the north, east, and north-west.
Holybourne Down is a hill 4.4 km north of Alton.
River Hill is a hill 7.0 km east-north-east of Alton.
Festival Place is a park 15.0 km north-north-west of Alton. Moor Park is a park 16.0 km east-north-east of Alton. Hogs Back is a ridge 21.5 km east-north-east of Alton.
There are 44 verified reports within 300 km between 2015 and 2016.
The record span for viable nights is from 2016 to 2026.
Qualifying nights include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), January 19, 2026 (Kp 8.67), November 12, 2025 (Kp 7.33), and November 11, 2025 (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) · Aurorasaurus verified positive reports
Know when it is worth going outside
Revon watches the Alton 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 Alton.