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Plan a Future Night

Pick any date up to 14 days ahead. Weather forecast included. Moon and planets always accurate.

Live conditions for β€” ❓ How this works 🏠 Home
A clear night sky
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Free Β· No signup Β· No ads Β· Built by an amateur, for amateurs

Is tonight a good night
to look up?

Your free stargazing forecast β€” see what's happening in the sky tonight at any location.

Hi β€” I'm Tim. I built this site because every astronomy planning tool I tried was either paywalled, cluttered, or missing what I actually needed under the eyepiece. So I built the one I wanted. Enter your location and you get a complete sky briefing in seconds β€” cloud cover, moon, aurora, ISS, planets, and tonight's best targets for your latitude. Free. Forever.

Is it clear tonight? Is the sky good for stargazing where you are? Will the Moon, planets, a meteor shower or the ISS be visible β€” and when's the best observing window? What's Up Tonight answers all of it for any location in one glance: cloud cover, transparency, moon phase and a clear-sky score from 0 to 100, updated for tonight and the nights ahead.

1. Enter your city or town in the search box below β€” or pick one of the dark-sky locations.
2. Read the Astro Score (0–100). Above 70 = go out tonight. Around 50 = OK with patience. Below 30 = stay in.
3. Scroll for the hourly cloud forecast, moon phase, ISS passes, planets, meteor showers and aurora. Click Targets for the full deep-sky catalog with altitude graphs.
4. Saved a location? It stays put. Visit anytime, no signup needed.
🎯 Astro Score β€” 0 = stay in Β· 100 = perfect
☁️ Hourly Forecast
πŸŒ™ Moon Phase
πŸ›Έ ISS Passes
⭐ Best Targets
🌑️ Dew Warnings
πŸŒ… Twilight Times
πŸͺ Planets
β˜„οΈ Meteor Showers
🌌 Aurora
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/ 100
Overall Astro Score
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Fetching conditions...
⏱ Calculating...
How the score is calculated:
Cloud cover 38% Β· Moon phase 24% Β· Precipitation 14% Β· Wind 13% Β· Humidity 11% Β· Averaged over the 5-hour observing window (9 PM – 2 AM tonight, 8 PM – 1 AM on later dates)
Cloud weighting is altitude-aware: high cirrus penalized more than low cumulus (it destroys astronomy more).
Dew is not scored β€” it doesn't dim a clear sky, it just fogs optics. See the Dew Risk card to plan for it (a heater band solves it).
Plan with this. Cross-check before high-stakes nights.
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Right Now β€” Current Conditions
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Cloud Cover
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Wind
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Dew Risk
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Rain Risk
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Transparency
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Hour by Hour β€” Evening Forecast
How will the sky change tonight?
Clear
Good
Cloudy
Poor
Rain
πŸ“ŠLoading forecast...
πŸŒ™
Moon Tonight
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Why is a "quarter" moon half-lit?
Phases are named by the Moon's position in its ~29.5-day cycle, not by how much of it is lit. First Quarter is one quarter of the way from one new moon to the next β€” and at that point exactly half the disc is lit. Less than half lit = crescent; more than half = gibbous; the two "quarter" phases are the half-lit points in between.

πŸ’‘ The illuminated % isn't a fixed daily value either β€” it drifts a percent or two through the day as the Moon orbits, so it's a moving target by nature. We show it for 9 PM, your evening observing window.
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Rises
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Sets
β‰ˆ sea-level horizon Β· true-north bearings β€” why?
Local terrain β€” hills, trees, buildings β€” can shift the actual moonrise/set by a few minutes. Bearings are geographic true north: set your phone compass to True North so its reading matches (iPhone: Settings β€Ί Compass β€Ί Use True North Β· Android: enable true north in your compass app).
πŸŒ™Calculating...
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Satellite Passes
ISS Next Pass
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Fetching pass times...
πŸš€ Starlink Trains
Chains visible 30–60 min after sunset or before sunrise.
findstarlink.com β†’
✨ Iridium Flares
Brief bright flashes β€” exact times at Heavens-Above.
heavens-above.com β†’
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Seeing & Transparency
Seeing
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Transparency
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Wind Stability
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Seeing ℹ️ Β· Transparency ℹ️ Β· Wind Stability ℹ️
Feels Like
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Sun, Twilight & Darkness Timeline
SunriseGolden HrNOW β–²SunsetAstro Dark
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Sunset
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Blue Hour
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Civil Dark
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Full Dark
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Aurora Forecast β€” Kp Index
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KP INDEX
QuietActiveStorm
Loading aurora data...
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Visible Above
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Current Kp
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Your Alert Kp
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Dew Point & Equipment Risk
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⚠️Calculating...
Conditions Valid As Of
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Temperature Tonight
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Lightning & Thunderstorm Risk
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NoneLowModerateHighExtreme
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RISK LEVEL
Loading thunderstorm data...
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Planet Visibility β€” Altitude Β· Direction Β· Best Viewing Time
Calculating planet positions...
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Tonight's Best Targets
Loading targets...
🎯
Plan your night β€” full target planner
Per-target altitude graphs Β· narrowband / RGB / visual filters Β· tonight visibility filter using your location
Open β†’
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Cross-Check the Forecast
Built on Open-Meteo. For high-stakes nights β€” long drives to dark sites, scarce-event imaging β€” verify with the tools serious observers cross-reference. No forecast is perfect; agreement across sources is the strongest signal.
πŸ”­ Clear Outside
Hour-by-hour cloud, transparency, and seeing β€” UK Met Office data, astronomer-tuned.
🌌 Astrospheric
High-resolution NAM/HRRR-based astronomy forecast β€” North America's gold standard.
🌐 Meteoblue Seeing
Jet stream, atmospheric stability and seeing maps β€” strong for imaging planning.
🌬️ Windy
Animated cloud / wind / humidity maps β€” multi-model ensemble in one view.
🌌 NOAA SWPC
Authoritative space weather forecasts β€” Kp, geomagnetic storms, aurora discussion.