Aurora Borealis in Swansea
United Kingdom · 51.62°, -3.94° · geomagnetic 54.1° · needs Kp 7
Tonight's aurora forecast for Swansea
2%
Peak chance of a visible display tonight, from the same model the Revon app runs. Swansea 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 Swansea
Aurora activity is measured by the Kp index. A Kp of 7 is the minimum threshold for aurora to be potentially visible in Swansea.
At 54.1° geomagnetic latitude, Swansea has an average of 2.7 nights per year with aurora potential.
This is based on records from 2016 to 2026.
The best months for aurora viewing in Swansea are September, August, and November.
During June and July, there is no full darkness, which can impact viewing conditions.
Swansea has a Bortle scale rating of 7, indicating significant light pollution.
Areas with a Bortle rating of 4, offering darker skies, can be found 15 km north-north-west of Swansea.
Local terrain includes hills such as Cefn-hengoed and Mynydd Cadle Common to the north-east and north-north-west, and headlands like Salthouse Point and Whiteford Point to the west.
Cefn-hengoed is a hill located 3.6 km north-east of Swansea.
Mynydd Cadle Common is a hill situated 3.9 km north-north-west of Swansea.
Salthouse Point is a headland 14.3 km west of Swansea, and Whiteford Point is a headland 21.0 km west of Swansea. Cefnmawr is a mountain 21.4 km east-north-east of Swansea.
There have been 47 verified aurora reports within 300 km of Swansea between 2015 and 2016.
Based on historical Kp data, there have been approximately 2.7 nights per year suitable for viewing aurora in Swansea.
Notable 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 · Revon location dataset · 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 Swansea 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 Swansea.