StarsOut
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Porto
5.8
out of 10
Clouds
70%
Moon
Waning Crescent
2% lit
Moon below horizon — perfect darkness
Best window
21:00 – 23:00
Sun ↓ 20:14·Dark from 21:14
Alert me on good nightsNext great night
Saturday — 7.4
🌙 Good night ahead
Sky quality tonight
Best: 21:00–23:00This week’s nights
Europe/LisbonHow 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.