StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Cardiff
0.3
out of 10
Peak 2h
3.202:00–04:00
Prime 21–01
0.121:00–01:00
Best this week
8.3Sat, Jun 6
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 22:17–04:59
📍 S · 10°
Sky now
Mostly cloudy · 75%
Measured at EGFF · 15km away · 12min ago
Sun ↓ 21:20·Dark from 22:20·100% clouds
🔭
Moon visible today
05:00 – 07:26 · 98% lit · great for telescope viewing
Next great night
Saturday — 8.3
✨ Great night tonight
Sky quality tonight
Best: 02:00–04:00This week’s nights
Europe/LondonHow 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.