Northern lights in Þórsmörk tonight
Southern Highlands, Iceland · 64° magnetic latitude · Kp 2 threshold
Kp 1 is below the threshold for Þórsmörk. Activity would need to rise to Kp 2 before aurora could reach this latitude.
7-day outlook for Þórsmörk
Tonight shows the live Kp reading. The nights after it show the Kp expected from any coronal mass ejection DONKI predicts will arrive that day, and a quiet baseline of Kp 2 where no arrival is forecast.
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Þórsmörk sits at a magnetic latitude of approximately 64°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 2 before the auroral oval expands far enough south to be visible from here.
At Kp 2, visibility is possible from Þórsmörk but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Þórsmörk
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Þórsmörk valley floor
Get directions ↗The valley floor is surrounded on three sides by glacier tongues from Eyjafjallajökull, Mýrdalsjökull, and Tindfjallajökull. No permanent settlements, no artificial light of any kind. The black sand and glacial river sediment floor of the valley gives an extraordinary foreground - pale ice glowing under aurora while the glacier walls rise on both sides. One of Iceland's most genuinely isolated dark sky positions accessible without specialist mountaineering equipment.
Valahnúkur viewpoint
Get directions ↗A short but steep hike above the Þórsmörk valley floor gives 360° views of all three glacier systems and the black sand valleys below. At around 300 m above the valley, the viewpoint is above any ground mist and gives unobstructed sky in all directions. Aurora from here shows the full panorama - glacier tongues lit green, river beds silver, and the sky active overhead. A key position for astrophotography in Iceland's Highland zone.
Stakkholtsgjá canyon entrance
Get directions ↗The entrance to a narrow canyon cut through volcanic rock by glacial meltwater. The canyon walls rise 30 m above the river and the entrance faces the open valley sky to the west. A small waterfall at the back of the canyon adds a water element. The dark basalt walls and the clear sky visible from the canyon entrance create a distinctive framing for aurora - different in character from the open glacier views but equally dramatic.
Best time to see the northern lights in Þórsmörk
At 64°N magnetic latitude, Þórsmörk has one of the longest aurora seasons in the world. Meaningful darkness returns in late August and displays are possible on almost any clear night from September through March. Only the endless daylight of May, June, and July rules out viewing completely.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Þórsmörk's latitude.
May through July is effectively impossible for aurora viewing: the midnight sun keeps the sky bright around the clock at this latitude. No storm level, not even G5, can produce a visible display without astronomical darkness.
Other Iceland aurora forecasts
Up to 8 locations
How often does the aurora appear in Þórsmörk?
Average nights per month the Kp reached Þórsmörk's threshold of 2+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 2+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Þórsmörk
Best window
The January to March window averages 72 aurora nights - the strongest consecutive stretch of the year.
How long to stay
For your best chance in March, plan at least 1 night.
Related pages
Northern Lights Iceland
Iceland-wide aurora forecast hub.
Read →Northern Lights Vík Tonight
Vík - Reynisfjara beach on the accessible south coast.
Read →Northern Lights Landmannalaugar Tonight
Landmannalaugar - rhyolite mountains, Highland access only.
Read →Northern Lights Jökulsárlón Tonight
Jökulsárlón - glacial lagoon, south coast year-round access.
Read →What Is the Kp Index?
What Kp 2 means for viewing at 64°N magnetic latitude.
Read →Planning your aurora trip
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