Northern lights tonight: can you see the aurora where you are?
Most nights, whether the aurora is out for you comes down to a single number called the Kp index, and how far north you sit. Get the live Kp, compare it to your latitude, and you have your answer before you waste a drive into the cold. Lumara shows that number straight from NASA, so you can check it in five seconds from the couch.
Start with the live Kp.
Kp runs from 0 to 9 and measures how disturbed Earth's magnetic field is right now. Quiet nights sit at 1 or 2. When a burst of solar wind or a coronal mass ejection hits, Kp climbs, and the higher it goes the farther from the poles the aurora slides. Lumara reads the current geomagnetic level from NASA's DONKI feed and shows it on the dashboard next to recent flares and eruptions, which are the events that drive a storm in the first place.
What Kp you need for your latitude.
This is the rough map between the number and where the lights reach. Your mileage shifts with your exact location and how dark your sky is, but it is close enough to make a go or no-go call.
| Kp | Storm level | Roughly visible from |
|---|---|---|
| 0 to 3 | Quiet | Near the poles only: northern Scandinavia, Alaska, northern Canada |
| 4 | Unsettled | Far northern states and southern Canada on a dark night |
| 5 | G1 minor storm | Northern tier of US states, much of the UK and northern Europe |
| 6 to 7 | G2 to G3 | Down toward the central US and central Europe |
| 8 to 9 | G4 to G5 | Mid latitudes, and on rare nights much farther south |
The other things that decide your night.
A high Kp gets you a chance, not a guarantee. Four things turn the chance into a sighting. Darkness: get well away from city glow. A clear northern horizon: aurora usually sits low in the north for anyone outside the far latitudes. Timing: the hours around local midnight tend to be the most active. And the Moon: a bright moon drowns out a faint display, so it helps to check the moon phase and aim for nights closer to new moon when the storm is weak. Cloud cover beats all of it, so glance at a normal weather forecast too.
Why 2026 is a good year to watch.
The Sun runs on an eleven-year cycle, and it spent the mid 2020s near the busy end of it. That means more sunspots, more flares, and more of the eruptions that fling plasma at Earth, which is exactly the fuel an aurora needs. Storms strong enough to drop the lights to mid latitudes have been more frequent than usual, so it is worth keeping the live Kp somewhere you can glance at it. For the full background on flares, coronal mass ejections, and how a storm builds, the space weather guide walks through all of it.
Open the live space weather dashboard