StarsOutAlert me on good nights
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Snowdonia
4.6
out of 10
Peak 2h
5.603:00–05:00
Prime 21–01
4.021:00–01:00
Best this week
8.6Fri, Sep 4
Moon
Waning Gibbous
66% lit
Bright moon — reduces deep sky visibility
🔭 Moon up: 20:59–13:23
📍 SW · 48°
Full moon: Sep 26
Sun ↓ 20:02·Dark from 21:02·99% clouds
🔭
Moon visible today
06:29 – 11:01 · 66% lit · great for telescope viewing
Next great night
Friday — 8.6
✨ Great night tonight
Sky quality tonight
Best: 03:00–05:00This week’s nights
Europe/LondonHow 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.