Aurora Borealis in Romsey
United Kingdom · 50.99°, -1.50° · geomagnetic 53.1° · needs Kp 7
Tonight's aurora forecast for Romsey
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Romsey 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 10:35 UTC
Local aurora guide for Romsey
Romsey is at 53.1° geomagnetic latitude. Auroras are typically visible here when the Kp index reaches 7.
On average, there are about 2.7 nights per year suitable for aurora viewing in this region.
The historical record for aurora sightings in this area spans from April 2, 2016, to March 30, 2026.
The months of September, August, and November offer the best opportunities for aurora viewing.
During June and July, there is no full darkness, which can impact visibility.
Romsey experiences a Bortle 6 sky brightness.
Areas with Bortle 4 sky brightness are located 57 km south-south-west, and Bortle 5 areas are 18 km east near Winchester.
Notable terrain features include Dunwood Fort, a hill 4.3 km west-north-west, and Claypit Hill, a hill 6.3 km east-north-east.
Dunwood Fort is a hill located 4.3 km west-north-west of Romsey.
Claypit Hill, a hill, is situated 6.3 km east-north-east of Romsey.
St. Cross Park is a park 13.9 km east-north-east of Romsey. Swan Island is an island 15.5 km north of Romsey. Ham Island is an island 17.7 km west of Romsey.
There have been 44 verified aurora reports within 300 km of Romsey between January 1, 2015, and December 31, 2016.
The historical record indicates approximately 2.7 viable aurora nights per year.
Notable qualifying nights in the record 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 Romsey 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 Romsey.