Finding the best location tonight…
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Chance now
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Tonight best score——
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Aurora score ⓘ
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Kp index——
Cloud cover——
Best time—Local timeAURORA FORECAST & ALERTS
Will I see theNorthernLights tonight?
Check hourly aurora chances, cloud cover and the best viewing time for your location. Get notified when conditions improve with Aurora Alerts.
See detailed forecast →
Kp index——Cloud cover——Best time—Local time
AURORA ALERTS APP
Get notified when the aurora appears
Real-time alerts, detailed forecasts and aurora maps anywhere in the world.
Push notifications
Aurora maps
3-day forecast
Favorite locations
Detailed space weather dataExplore the Aurora Alerts app
Hourly aurora forecast
Compare Hp60 activity with cloud cover hour by hour and plan when to head outside.
Animated aurora map
Follow the auroral oval on the map to see where activity may develop.
Smart aurora alerts
Choose alert presets and reduce repeat notifications without missing stronger events.
Your locations
Check conditions at your current location or places you select while traveling.
Longer outlook
Use the 3-day forecast and an optional 27-day trend. Longer-range predictions are less precise.
Screens shown are from iPhone. Features and availability may vary by platform and app version.
Aurora forecasts around the world
View all locations →
NONorway→Live aurora forecast
CACanada→Live aurora forecast
GBUnited Kingdom→Live aurora forecast
AUAustralia→Live aurora forecast
NZNew Zealand→Live aurora forecast
ISIceland→Live aurora forecast
FIFinland→Live aurora forecast
SESweden→Live aurora forecast
USUnited States→Live aurora forecast
USAlaska→Live aurora forecast
RURussia→Live aurora forecast
🌍View all locations→Aurora forecasts around the world
ABOUT THE APP
Aurora Alerts
Aurora Alerts is an app designed to monitor real-time auroral activity and push alert to let you know if there may be aurora borealis (northern lights) visible tonight. Whenever you are home or away, Aurora Alerts will notify you if the possibility of seeing the northern lights exists.
Main features
- ✓Short-term aurora forecast for next hour with weather conditions and moon illumination
- ✓Long-term aurora forecast for the next 3 days with weather conditions
- ✓Show probability to see Northern Lights based on your or custom location
- ✓Current auroral activity based on observed and predicted Kp Indices from U.S. Air Force Weather Agency
- ✓Weather forecast to check visibility conditions before planning to see northern lights
- ✓Solar wind data directly from the NASA satellite: wind speed, Bz, Bt and density
- ✓Unlike many other apps, it uses the local time instead of UTC
Alerts
- ✓When northern lights may be visible at current or custom location at the horizon or overhead
- ✓Kp index reaches chosen value
- ✓Solar wind data reach chosen values
- ✓You can filter out alerts based on current cloud cover or time of the day
FAQ
Will I see the Northern Lights tonight?
A forecast cannot guarantee a sighting. Compare the local aurora chance and hourly Viewing Score with darkness, cloud cover and the best viewing window. Conditions may change.
What Kp index do I need to see aurora?
There is no universal Kp threshold. Kp describes global geomagnetic activity, while local visibility depends on the auroral oval, geomagnetic latitude, darkness and clouds. Check the location forecast.
Can cloud cover block the aurora?
Yes. Thick cloud can hide aurora even during strong geomagnetic activity. Compare cloud cover by hour, and turn on “Include clouds in score” if you want clouds reflected in Viewing Score.
How can I receive aurora alerts?
Install Aurora Alerts on iOS or Android, choose your location, set notification thresholds and times, and allow notifications on your device. Downloading is free; some alert features may require an in-app purchase.
How is the Viewing Score calculated?
Viewing Score is a local 0–100 estimate, not an official NOAA probability. It starts with the aurora chance for the location; future hours adjust that activity using the predicted Kp.
The score is then reduced by daylight, cloud cover (when “Include clouds in score” is enabled), and bright Moon conditions when the Moon is above the horizon. Clear, dark conditions therefore preserve more of the aurora signal, while daylight or heavy clouds can reduce the score sharply.