Northern lights in Cambridge tonight
Cambridgeshire · 52° magnetic latitude · Kp 6-7 threshold
Kp 1 is well below the Kp 6-7 threshold needed for aurora to be visible from Cambridge.
7-day outlook for Cambridge
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Cambridge sits at a magnetic latitude of approximately 52°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 6-7 before the auroral oval expands far enough south to be visible from here.
At Kp 6-7, visibility is possible from Cambridge but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Cambridge
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
The Fens - north Cambridgeshire
Get directions ↗The flat fenland north of Cambridge toward Ely and March is among the least light-polluted agricultural land in the East of England. The completely flat horizon gives unobstructed sky from ground level in all directions. Dark enough for Bortle 4-5 conditions 20-30 minutes from the city.
Thetford Forest
Get directions ↗The large Forestry Commission pine forest on the Norfolk/Suffolk border, about 35 minutes north-east of Cambridge. Forest clearings give Bortle 4 conditions with dark canopy horizon. High Lodge visitor centre gives access points.
Grafham Water
Get directions ↗A large reservoir north-west of Cambridge near Huntingdon, about 20 minutes by car. Open water gives a clear north-facing horizon. The west bank gives north-north-west sky access with minimal settlement behind.
Newmarket Heath and the chalk escarpment
Get directions ↗The open chalk grassland around Newmarket Heath and the Gog Magog Hills east of Cambridge gives elevated positions at Bortle 5 conditions. Better than central Cambridge but not as dark as the Fens or Thetford.
Best time to see the northern lights in Cambridge
At 52°N magnetic latitude, Cambridge sits at the lower end of regular aurora territory. Only the deep mid-winter months of November through January offer nights dark enough for aurora to be visible, and only then when a significant geomagnetic storm pushes the auroral oval this far south.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Cambridge's latitude.
Outside November through January, twilight is too bright for aurora viewing even during significant storms. The season is short, but the equinox months on either side of winter can extend it slightly when storm timing aligns.
Other UK aurora forecasts
How often does the aurora appear in Cambridge?
Average nights per month the Kp reached Cambridge's threshold of 6+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 6+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Cambridge
Best window
The January to March window averages 1 aurora nights - the strongest consecutive stretch of the year.
How long to stay
Aurora at this latitude requires patience - allow as many nights as possible during March.
Related pages
Northern Lights UK
Live aurora forecast hub for all UK regions.
Read →Northern Lights Norwich Tonight
Norwich is north-east with the north Norfolk dark coast.
Read →Northern Lights London Tonight
London is south with a higher Kp threshold.
Read →What Is the Kp Index?
What Kp 6-7 means for viewing from East Anglia.
Read →Tips for Viewing the Northern Lights
How to plan a dark sky watch from a flat-terrain city.
Read →Aurora photographs from Cambridge
Real photos sourced from Wikimedia Commons.
Aurora over Cambridge 
Aurora over Cambridge 
Aurora over Cambridge 
Aurora over Cambridge 
Aurora over Cambridge 
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