StarsOut
Is tonight good for stargazing in Porto?
Great night tonight
Clear skies and dark conditions. Go outside.
Porto
Tonight's score
8.6
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Sun ↓ 18:55Dark 20:26–06:1424% cloud, 20:26–06:14
Best 2 hours
9.020:26–22:00
Evening, 21–01
8.521:00–01:00
Best this week
9.7Sun, Oct 18
Parts of the night. The score above covers the whole dark window.
Moon
Waxing Crescent
18% lit
Moon doesn’t interfere — perfect darkness
Moon up: 11:52–20:43
Visible in daylight from 11:52 until sunset
Full moon: Oct 26
Sky quality tonight
Best 2 hours: 20:26–22:00This week’s nights
Europe/LisbonHow 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.