StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Perth
4.5
out of 10
Peak 2h
5.304:00–06:00
Prime 21–01
4.121:00–01:00
Best this week
10.0Tue, Sep 8
Moon
Waning Gibbous
66% lit
Bright moon — reduces deep sky visibility
🔭 Moon up: 23:25–09:44
Full moon: Sep 26
Sun ↓ 18:00·Dark from 19:00·96% clouds
🔭
Moon visible today
06:31 – 11:01 · 66% lit · great for telescope viewing
Next great night
Thursday — 7.9
✨ Great night tonight
Sky quality tonight
Best: 04:00–06:00This week’s nights
Australia/PerthHow 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.