Stargazing Weather: Starglow

Starglow is your stargazing forecast. It tells you when the sky will be clear, where it will be darkest, and what you’ll see when you get there.

KNOW WHEN TO LOOK UP
An hour-by-hour timeline shows when conditions are best tonight:
• Total cloud cover, plus high, mid and low cloud
• Visibility and viewing quality, hour by hour
• Seeing and transparency: steady air for planets, clear air for galaxies (Pro)
• Models Clear: how many of six weather models agree on a clear sky (Pro)
• Forecasts up to 5 days ahead (Pro)

FIND DARK SKIES
• Dark Site Finder: light pollution from NASA satellite data, your Bortle class, and the darkest places nearby ranked by tonight’s cloud (Pro)
• Best Location Tonight: your saved spots ranked by cloud and darkness (Pro)
• Save and name your favourite observing spots (Pro)

SEE THE SKY BEFORE YOU GO
• Moon map and AR: the Moon’s direction, path and phase, on the map or through your camera
• 3D Map with real terrain and buildings, and the Moon at its true size (Pro)
• Vantage Point: stand anywhere and see the Moon, stars, planets, the Milky Way and the ISS over the real skyline (Pro)
• Star Trails: plan a long exposure and preview every trail over the skyline (Pro)
• ISS passes in AR: follow the station’s path across your sky (Pro)

NEVER MISS A CLEAR NIGHT
• Alerts for dark skies, moonrise and moonset, new and full Moons, and ISS passes
• Clear night alerts when a good night is coming (Pro)
• Home and Lock Screen widgets (Pro)
• Siri and Shortcuts: ask about tonight’s sky, the Moon phase or the next ISS pass
• Red night mode to protect your night vision

STARGLOW PRO
Pro unlocks 5-day forecasts, seeing and transparency, the Dark Site Finder, Vantage Point, Star Trails, widgets and more. Share it with up to five family members.

Already using Alpenglow for sunrise and sunset? Pair it with Starglow to cover the sky from golden hour to the Milky Way.

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Privacy Policy: https://starglowapp.com/privacy