StarsOut
Is tonight good for stargazing in San Francisco?
Drop everything — go outside
Near-perfect conditions. Nights like this are rare.
San Francisco
Tonight's score
10.0
out of 10
Sun ↓ 18:33Dark 20:00–05:500% cloud, 20:00–05:50
Best 2 hours
10.020:00–22:00
Evening, 21–01
10.021:00–01:00
Best this week
10.0Thu, Oct 15
Parts of the night. The score above covers the whole dark window.
Moon
Waxing Crescent
21% lit
Moon doesn’t interfere — perfect darkness
Moon up: 11:34–20:45
Visible in daylight from 11:34 until sunset
Full moon: Oct 26
Right now at KHAF, 7 min ago
Clear · 0%
Airport weather report 30 km away. The score above is the forecast for tonight after dark.
Sky quality tonight
Best 2 hours: 20:00–22:00This week’s nights
America/Los AngelesHow the score works
60% weight
Cloud cover
Averaged over the whole dark window, layer by layer. Low cloud blocks everything; thin high cirrus still lets bright stars through.
40% weight
Moon darkness
A new moon boosts the score. A bright Moon only costs points while it is actually above the horizon in the dark hours, and more the higher it stands.