StarCast shows the Bortle class and live night sky score for any location you search. Find the nearest dark sky within driving distance — and know whether tonight is actually worth the trip before you leave.
iOS app: $2.99/mo · 7-day free trial
The answer depends heavily on where you live. The western US has exceptional dark sky within a short drive of most cities. The eastern US requires more effort — but reachable dark sky exists almost everywhere if you know where to look. StarCast lets you search any location and instantly see its Bortle class so you can scout progressively further from home until you find what you need.
Bortle class tells you what the sky is rated. It doesn't tell you whether tonight is good. Moon phase, cloud cover, and atmospheric transparency change every night — and they matter as much as the Bortle class itself. A new moon at Bortle 4 often beats a full moon at Bortle 2. StarCast combines all of these into a single 0–100 score. Check the score for your target location 3–5 days out for planning, and confirm 24–48 hours before when cloud timing is most accurate.
Bortle class · Moon phase · Cloud cover · Transparency
Push alerts · Saved locations · 0–100 night sky score
$2.99/mo after 7-day free trial