StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Porto
3.0
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Peak 2h
4.100:00–02:00
Prime 21–01
3.521:00–01:00
Best this week
8.1Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 21:42–06:20
📍 S · 20°
Sky now
Clear · 0%
Measured at LPPR · 10km away · 16min ago
Sun ↓ 21:00·Dark from 22:00·92% clouds
🔭
Moon visible today
18:56 – 21:00 · 98% lit · great for telescope viewing
Next great night
Saturday — 7.4
🌙 Good night ahead
Sky quality tonight
Best: 00:00–02:00This 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.