StarsOutAlert me on good nights
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
San Francisco
6.0
out of 10
Peak 2h
7.600:00–02:00
Prime 21–01
6.021:00–01:00
Best this week
8.8Sat, Jun 6
Moon
Full Moon
100% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 21:21–06:25
Sky now
Clear · 13%
Measured at KSFO · 18km away · 11min ago
Sun ↓ 20:25·Dark from 21:25·1% clouds
🔭
Moon visible today
18:07 – 20:25 · 100% lit · great for telescope viewing
Next great night
Friday — 8.6
✨ Great night tonight
Sky quality tonight
Best: 00:00–02:00This week’s nights
America/Los AngelesHow 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.