How far south can you see the northern lights?

The direct answer

At Kp 1, aurora is only visible above roughly 67°N - the latitude of Tromsø. At Kp 9 it can reach as far south as Spain, Italy, and the southern United States. The southernmost visibility is set entirely by the intensity of the geomagnetic storm, measured on the Kp scale.

Two other factors then determine whether you actually see it at your location: sky darkness and distance from light pollution. Someone in a city at 55°N will miss a Kp 6 event that is clearly visible from a dark hillside at the same latitude. The latitude threshold tells you whether aurora is geometrically possible from your position; the local conditions determine whether it is practically visible.

Kp 5 and above is classified as a geomagnetic storm. Below Kp 5, conditions are quiet to unsettled and aurora is confined to high latitudes. The table below shows the approximate southernmost visibility for each Kp level under ideal conditions.

Kp level and southernmost visibility

These latitudes assume no cloud cover, minimal light pollution, and a dark north-facing horizon. Urban viewers may need 1-2 Kp levels higher than shown to achieve the same visibility as someone at a rural dark sky site.

Latitudes are geographic approximations based on auroral oval modelling. Actual visibility depends on local sky conditions, magnetic latitude (which differs from geographic latitude), and storm timing relative to local darkness hours.

The May 2024 G5 storm

On 10-11 May 2024, Earth was struck by the strongest geomagnetic storm in 20 years. The event reached Kp 9 - a G5 on the NOAA storm scale - driven by a series of X-class solar flares and fast CMEs that arrived in rapid succession over 36 hours.

Aurora was photographed from Mexico, Florida, and the Texas Panhandle. Across the Atlantic, it was visible from the Canary Islands, the Spanish mainland, northern Italy, and the Azores. Red aurora - caused by oxygen atoms at high altitude responding to the elevated particle flux - was reported from locations that had not seen aurora in decades. New Zealand's North Island recorded displays on both nights.

This is what the top of the Kp scale produces. The event was visible to the naked eye from latitudes well below 45°N across much of the northern hemisphere. It is also a fair representation of what solar maximum can generate - and why the 2024-2026 period is the best opportunity for low-latitude viewing in a decade.

Why light pollution matters at lower latitudes

At Kp 6, aurora can geometrically reach southern England. But from central London, city glow fills the northern sky with a orange-white wash that swamps all but the brightest aurora. The same storm produces a clear green arc visible to the naked eye from Galloway Forest in southwest Scotland, the Yorkshire Dales, or Exmoor on the north Devon coast.

For central European viewers, the calculation is similar. Masurian Lakes in northeast Poland gives some of the darkest skies in central Europe and faces north across flat terrain. Šumava National Park on the Czech-German border is one of the few certified dark sky areas in the region. On the German Baltic coast, Rügen island looks north across open water with no land mass to generate light pollution in the critical direction.

The practical rule: dark sky positions raise your effective Kp sensitivity by 1-2 levels compared to city viewing. A location rated for Kp 6 in ideal conditions typically needs Kp 7-8 to produce the same visible display from a city centre.

Solar maximum and the current opportunity

Solar cycle 25 reached its peak around 2024-2025 and performed stronger than most pre-cycle predictions. At solar maximum, the frequency of Kp 5-6 events increases significantly. Events that happen a handful of times per year near solar minimum are occurring monthly during the current peak.

For locations that rarely see aurora - southern England, the Netherlands, Germany, and the central and southern United States - this represents a genuine window of elevated opportunity. The May 2024 G5 storm was the headline event, but there were also multiple Kp 6-7 events in 2024 and early 2025 that produced aurora across much of northern and central Europe.

Activity will decline gradually through 2026-2028 as the cycle descends toward its next minimum. Full details on the current solar cycle and what to expect are on the solar maximum guide.

Southern latitudes worth monitoring

If you are at a lower latitude and want to know where to go during a storm, here are the best positions by region and Kp threshold.