Galloway Forest Park is very dark but cloudy, and it only makes sense to come here in the long nights from October to March. Clear windows are short: you win if you can shift your trip by a day or two.
The long-night season
The International Dark Sky Park is darker than 82% of Europe’s land, light pollution “very dark”. A year adds up to 144 clear moonless dark hours. From October to March that is 17–21 hours a month, in May 0, in June and July there is no astronomical darkness at all, in August 5 hours. Even in January, of 189 moonless dark hours only 11% are clear.
Nights of 2026–2027
Among the showers, the best odds come from the Quadrantids on the night of 3–4 January 2027: Moon lit 13%, 13.0 moonless dark hours, a clear peak in 27% of years. On the new moon night of 7–8 January 2027 there are 12.0 moonless dark hours, with a typical share of good nights at 13%. Kielder Water & Forest Park, 116 km away, holds the same status: darker than 82% of the land, 135 clear dark hours a year. This is the climate of 2006–2025, not a forecast (methodology).