StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Rotterdam
2.2
out of 10
Peak 2h
3.901:00–03:00
Prime 21–01
2.721:00–01:00
Best this week
8.6Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 22:48–05:24
📍 SW · 5°
Sky now
Clear · 0%
Measured at EHRD · 4km away · 18min ago
Sun ↓ 21:51·Dark from 22:51·100% clouds
🔭
Moon visible today
18:56 – 21:51 · 98% lit · great for telescope viewing
Next great night
Friday — 8.4
✨ Great night tonight
Sky quality tonight
Best: 01:00–03:00This week’s nights
Europe/AmsterdamHow the score works
60% weight
Cloud cover
Layer-weighted across the best 2-hour window of the night. Low clouds block everything, thin high cirrus still lets bright stars through.
40% weight
Moon darkness
A new moon boosts the score. A full moon near midnight washes out all but the brightest stars. We ease the penalty after midnight when the moon is setting.