StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
London
3.6
out of 10
Peak 2h
5.222:00–00:00
Prime 21–01
4.621:00–01:00
Best this week
8.0Thu, Sep 3
Moon
Waning Gibbous
91% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:07–08:50
📍 SW · 28°
Full moon: Sep 26
Sky now
Mostly cloudy · 75%
Measured at EGLC · 13km away · 31min ago
Sun ↓ 19:52·Dark from 20:52·82% clouds
🔭
Moon visible today
06:11 – 08:35 · 91% lit · great for telescope viewing
Next great night
Wednesday — 7.6
✨ Great night tonight
Sky quality tonight
Best: 22:00–00:00This 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.