Astrospheric is the most advanced forecasting service for North American astronomers

Using the amazing astronomy data produced by the Canadian Meteorological Center, NOAA, and more, Astrospheric quickly produces a highly accurate 48 hour forecast for any location in the continental United States or Canada.


• 48 hour, hour-by-hour forecast
• Extended 10 day cloud forecast
• Kp index for Aurora viewing
• Sky data: cloud, sky transparency, seeing, and smoke
• Ground data: wind, temperature, and humidity
• Precise rise and set times for both the sun and moon
• Get weather alerts when conditions meeting your requirements are met

Site Mode
• Information necessary to quickly set up your GOTO tracking mount
• Available even if you don’t have a network connection

The Astrospheric Subscription is now available to enable Weather Alerts
• The Astrospheric subscription is billed monthly and will auto-renew unless turned off at least 24-hours before the end of the current subscription period. The renewal cost will be the same as the initial sign-up cost of the subscription. Any changes in cost will be communicated before renewal takes place.
• Payment will be charged to iTunes Account at confirmation of purchase
• Subscriptions may be managed by you and auto-renewal may be turned off by going to the your Account Settings after purchase. A link to these settings is made available within Astrospheric "My Profile" for easy access.
• The terms of use and privacy policy may be found at, purchasing a subscription shows agreement to these terms.

Please note that weather data is not available for Hawaii due to the domain area covered by the Canadian Meteorological Center. However, satellite and light pollution map layers, as well as other features will work in Hawaii.

What’s New

Version 6.3.4

- Bug fixes
- Improvement to push notifications for newer devices

Ratings and Reviews

4.8 out of 5
134 Ratings

134 Ratings

NeoObserver ,

Excellent app for astronomy

Living in a city with moderate light pollution limits observing and astrophotography. Driving to a dark site is great - when the skies are clear and calm when you get there. And that’s the problem - how can weather through the evening be predicted accurately?
I regularly use five apps to help predict the likelihood of a calm, clear night for astronomy. It is great when a majority give similar predictions, but often this does not happen.
Over time, Astrospheric has become my “go to” app. I love the hourly cloud cover predictions and frequent updates. The core of what an observer or astrophotographer needs to make the decision to go or stay is clearly presented and most often correct. Many thanks to the developers!

airwings7 ,

Good big picture app, but don’t like some things about it.

This is a pretty good app that gives you the big picture for planning astronomical viewing, however I do not like one aspect of it. The app opens with a location that is automatically selected near your current location, but it is off enough that you need to change it to your location by using a map or the forecasts might not be accurate. It does not remember your location when you start the app again and you must again manually select the correct location from a map. It then will tell you that you can save the location, but only if you provide them with your email address which is their way of compelling one to do that and enable the “favorites” to be available. I think that we should not have to provide our email address to set the home location and sort of sounds like blackmail to me.

Developer Response ,

"Favorite" locations automatically sync to any device or browser you access Astrospheric from. Using an email seemed simpler than making folks create a user name and password (which would have also required email verification). Also, don't forget to turn on GPS location for higher accuracy, if you don't then the app will fallback to a simple IP lookup which can be less accurate. Anyways, feel free to use a junk email address and make sure to check out the privacy statement for what and how collected data is used. Thanks for the feedback, feel free to reach out using the in-app feedback if you want to discuss possible bugs!

Pentheseleia ,

High magnification and wide field

This rating is for the app not the forecasts. While the forecasts are better for astronomy than most generic ones, a 5 star rating is not there yet. The app presents the forecasts in a clear and easily understood way. It gives a detailed hour by hour forecast for near term but a “wide field” less detailed view for the next week. This allows you to monitor potential astronomical conditions further in advance for planning. Results are presented graphically but a handy textural/numerical definition is adjacent for any selected hour. Sun and Moon elevation and rising and setting times are also shown. Don’t leave home for that long drive to the dark sky site without checking it.


Daniel Fiordalis
16.1 MB

Requires iOS 9.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Astrospheric Subscription $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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