Clear Outside vs Astro Seeing

Reliable weather forecasts for astronomers with an emphasis on cloud cover. Key Features Weather Forecasts • Seven day hourly forecasts, updated hourly • Low, medium, high and total cloud cover • Regular weather data (wind, rain, frost, temperature, dew point, etc) • Covers daytime too - ideal for solar observers and imagers Astronomical Information • Moon rise/set times and phase • Sun rise/set and transit times • Civil/nautical/astronomical darkness periods • International Space Station (ISS) pass-over information with precise timing for your location Location Management • Set and save your home location for quick access • Add locations manually or use location services for automatic positioning • Search for locations worldwide • Save multiple favourite locations for easy switching • All location data stored locally on your device Why Clearoutside? Updated hourly, because frequent updates matter! Often the clear spell between showers provides excellent seeing, and 30 minutes under a clear sky with a grab-and-go telescope is pure gold. Our favourite feature? The ISS pass-over information is precisely calculated for your location and displayed alongside cloud forecasts, making it easier than ever to catch the station overhead. No cutesy graphics - just detailed, reliable weather data presented clearly for serious observers. We've had a lot of fun building and testing Clear Outside and are keen to develop it further. If you find it useful or have suggestions, please let us know!

Astro Seeing tells you when it's worth looking up. We aggregate weather forecasts from six leading sources — Open-Meteo, OpenWeatherMap, WeatherAPI, Tomorrow.io, AccuWeather, and Meteosource — plus atmospheric seeing data from 7Timer, and turn it all into one clear answer: how good are tonight's stargazing conditions? Tonight's verdict — plain-English recommendations from "excellent" to "poor" Multi-source consensus — see where forecasters agree, and where they disagree Seeing & transparency — real atmospheric stability data, not just cloud cover Field of View calculator — frame any target through your telescope and eyepiece or camera, with a live sky atlas and sampling advice Moon phase — tonight's phase, illumination, rise and set times ISS passes — know when to spot the International Space Station overhead Light pollution — Bortle scale estimate for your exact location Best viewing window — when the sky will be clearest tonight 7-day outlook — plan ahead with nighttime-specific weather averages Observing targets — deep-sky objects, planets, conjunctions and meteor showers visible from your area Hourly timeline — cloud cover, humidity, dew point and seeing, hour by hour Cloud cover chart — visual side-by-side comparison across every source No account required. No ads. Free. Made for backyard astronomers, astrophotographers, and anyone who's tired of generic weather apps that don't understand stargazing.