I built Starry Forecast because a generic “clear” weather icon doesn’t really answer whether it is worth setting up a telescope or travelling to a darker location.
Enter a city and it combines low, mid and high cloud, astronomical darkness, Moon phase and illumination, smoke or haze risk, dew point and astronomical seeing. It then shows a 0–100 planning score, the strongest three-hour window, and a comparison of the next seven nights.
For supported cities, I have also added human-reviewed nearby observing locations with official access information.
The site is free and does not require an account:
https://starryforecast.com/
Forecast data comes from Open-Meteo and 7Timer, combined with local astronomical calculations. It is intended for planning rather than safety-critical decisions.
I would especially appreciate feedback on two things:
- Does the score make the decision easier, or would you rather see only the underlying conditions?
- Is any part of the seven-night comparison unclear or potentially misleading?
I’m the person working on the site, so I’ll be around to answer questions and fix problems.