Aurora Borealis in Letchworth Garden City
United Kingdom · 51.98°, -0.23° · geomagnetic 53.9° · needs Kp 7
Tonight's aurora forecast for Letchworth Garden City
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Letchworth Garden City 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.
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Updated 2026-09-08 10:36 UTC
Local aurora guide for Letchworth Garden City
Aurora activity is measured by the Kp index, with Kp 7 considered a strong geomagnetic storm. At a geomagnetic latitude of 53.9°, aurora visibility is rare.
On average, there are approximately 2.7 nights per year with conditions suitable for aurora viewing in this region. The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing are September, August, and November. During these months, the duration of darkness is sufficient for potential aurora sightings.
However, June and July experience no full darkness, which can significantly reduce viewing opportunities during those summer months.
Letchworth Garden City experiences a Bortle 6 sky, indicating moderate light pollution. Darker skies, rated Bortle 4, can be found approximately 92 km north-north-east near King's Lynn and West Norfolk.
Further Bortle 5 skies are located about 50 km east near Braintree. Several elevated locations offer potential viewing spots, including Topler's Hill, Meppershall Hill, and Ampthill Park.
Topler's Hill is a hill located 7.5 km north of Letchworth Garden City. Meppershall Hill, another hill, is situated 8.9 km west-north-west.
Wrest Park is a park 13.0 km west-north-west, and Flitwick Moor is a reserve 17.4 km west. Ampthill Park, a park, lies 20.0 km west-north-west.
Between January 1, 2015, and December 31, 2016, there were 60 verified aurora reports within 300 km of Letchworth Garden City. The historical record for viable nights spans from April 2, 2016, to March 30, 2026.
Notable qualifying nights within this period 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
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