Can you see the aurora with the naked eye?
Yes, when activity is strong enough. Faint auroras often look like a grey haze to the eye — a camera shows colour roughly one Kp level earlier because the sensor collects light over seconds.
Live · NOAA
Aurora tonight — will you see the northern lights?
Whether it's worth looking north tonight comes down to the Kp value. Here is the expected activity for the next nights and the Kp level you need at your latitude — live from the NOAA forecast.
Tonight
Aurora chances
Assessment based on the expected maximum Kp over the next 24 hours.
Green zones: areas tonight's forecast maximum can reach — simplified by geographic latitude; actual geomagnetic latitude varies locally.
Bright green cloud: the current auroral oval from NOAA OVATION — short-term forecast for the next 30–60 minutes.
What Kp do you need at your latitude?
The stronger the geomagnetic activity, the further south the auroral oval reaches. These are guide values for naked-eye aurora under clear, dark skies — a camera picks it up roughly one Kp level earlier.
| From Kp | Region | Examples |
|---|---|---|
| 0–1 | Auroral zone | Tromsø, Lapland, Fairbanks, Yellowknife — near-nightly aurora in clear winter skies. |
| 2–3 | Iceland, northern Scandinavia | Reykjavík, Kiruna, Rovaniemi. |
| 4–5 | Southern Scandinavia, Scotland, northern US border | Oslo, Stockholm, Inverness, northern Minnesota and Maine. |
| 6 | Denmark, Baltic coast, US–Canada border states | Copenhagen, the German North Sea coast, North Dakota, Michigan's Upper Peninsula. |
| 7 | Northern Germany, southern UK, northern US | Hamburg, Berlin, London (faint), Seattle, Chicago, Boston. |
| 8–9 | Central Europe, central US | Munich, Vienna, Zurich, Denver, Washington DC — rare G4–G5 events only. |
How to improve your odds
Get away from city lights — light pollution is the most common reason the aurora "wasn't there". You need a clear view to the north (south, if you're in the southern hemisphere), the darkest sky you can find (a new moon helps), and patience between roughly 10 pm and 2 am — aurora arrives in bursts lasting minutes to hours.
Take the camera seriously: night mode or a 5–15 second exposure shows colour the eye can't see yet. Many mid-latitude sightings begin as a green streak on a test shot. And check the clouds — the strongest storm is useless under an overcast sky.
Why Kp isn't everything
Kp describes three-hour periods globally — a good guide, not a live switch. Whether the sky actually lights up also depends on the orientation of the solar wind's magnetic field (southward Bz favours aurora) and on whether a substorm is underway. So from Kp 6 up: keep an eye on the current activity, and if the sky is clear, just go out — the best sightings happen to people who try.
FAQ
Questions about tonight's aurora
What is the best time to watch?
Usually between 10 pm and 2 am local time, around magnetic midnight. Activity arrives in bursts called substorms — fifteen minutes of patience pay off when the Kp is right.
How far south can the aurora reach?
At Kp 5 it can touch Scotland and the US–Canada border states; at Kp 7 northern Germany and states like Iowa or Pennsylvania come into play; Kp 8–9 events can reach central Europe and the central US — but those are rare.
Why do photos show more than the eye?
A camera sensor accumulates light over seconds, the eye does not. Night mode or a 5–15 second exposure reveals green and red where the eye only sees a bright haze — both are real aurora.