When can you see the Milky Way in Belgium?

Nowhere in Belgium does the bright core of the Milky Way climb clear of the horizon haze while the sky is fully dark. It peaks at about 11° in Charleroi, Wallonia, and that happens around midsummer, when the sun never gets 18° below the horizon. What you can see is the rest of the band, high overhead on dark nights. The longest moonless nights come from September to April.

Where in Belgium is the Milky Way band brightest?

The band needs a dark sky more than anything. Each region with its longest moonless nights, how many of its places are Bortle 1 to 3, and its darkest place.

The darkest places in Belgium to see the Milky Way

1. Entre-Sambre-et-Meuse National Park Wallonia · Bortle 421.23
2. Deux Ourthes Nature Park Wallonia · Bortle 421.16
3. Bosland National Park Flanders · Bortle 520.14
4. Hoge Kempen National Park Flanders · Bortle 519.82
5. Namur Wallonia · Bortle 519.82
6. Verviers Wallonia · Bortle 519.78
7. Scheldt Valley National Park Flanders · Bortle 519.73
8. Forests of Brabant National Park Flanders · Bortle 519.69
9. Genk Flanders · Bortle 619.43
10. Sint-Niklaas Flanders · Bortle 619.34

Sky brightness overhead in mag/arcsec²: higher is darker, 21.95 is a natural sky.

Which months have the longest dark nights in Belgium?

Hours per night with the sun more than 18° below the horizon and the moon down, for the median place in 2027. From May to July most of Belgium gets no full darkness at all.

How the Milky Way dates for Belgium are calculated

The positions of the sun, the moon and the center of the Milky Way are calculated for every night of 2027 at each place. A night counts when the core stands more than 10° above the horizon for at least an hour while the sun is more than 18° below the horizon and the moon has set. These are calculated positions; whether a night is clear is only known closer to the date. How it works