Aurora Borealis in Portishead
United Kingdom · 51.48°, -2.77° · geomagnetic 53.8° · needs Kp 7
Tonight's aurora forecast for Portishead
2%
Peak chance of a visible display tonight, from the same model the Revon app runs. Portishead 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 Portishead
Portishead is at a geomagnetic latitude of 53.8 degrees. Auroras are typically visible at Kp 7 or higher.
On average, there are 2.7 nights per year in Portishead where conditions are suitable for aurora viewing.
The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Portishead are September, August, and November.
During June and July, there is no full darkness, which can impact viewing conditions.
Portishead experiences a Bortle 7 light pollution level.
Darker skies, Bortle 4, can be found 66 km north-north-west near Powys.
Darker skies, Bortle 5, can be found 30 km north near Monmouthshire.
To the north of Portishead, you can find Denny Island, a small island 4.9 km away.
To the east-north-east, Kings Weston Hill is a hill located 8.5 km away.
To the north-west, Scarog Bay is a bay 9.3 km away. Wilcrick Hill, a hill, is 12.9 km to the north-north-west. Aztec West, a park, is 15.5 km to the east-north-east.
There have been 59 verified aurora reports within 300 km of Portishead between January 1, 2015, and December 31, 2016.
Notable qualifying nights in the historical record include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), and January 19, 2026 (Kp 8.67).
Additional qualifying nights occurred on 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 Portishead 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 Portishead.