Chasing the northern lights in 2026–27: four countries, one eSIM, no guarantees

When: the season, the hours and the moon

The season runs from late August to early April, whenever the sky is dark enough. In summer the midnight sun hides the lights, and the same places make a different trip: see coolcations.

The best months are at the edges. The Finnish Meteorological Institute names September–October and February–March, and NOAA explains why: geomagnetic storms are more frequent around the equinoxes. Autumn is milder too, and until the lakes freeze in late November the lights are doubled in the water.

Plan an early dinner, not an alarm. FMI puts the best hours at 9pm to 1am local time, Visit Tromsø at 8pm to 2am; Finland is an hour ahead of Norway. In Tromsø's polar night, late November to late January, the sun does not rise and chases leave at 5pm, not 7.

The moon matters less than people think. A full moon dims a faint display, but a strong one shows straight through, and moonlight gives your photos a landscape. For the darkest skies, the season's new moons fall on 10 October, 9 November and 9 December 2026, and 7 January, 6 February and 8 March 2027.

The solar maximum, declared by NASA and NOAA in October 2024, has passed; NOAA's sunspot count has been falling since. Big storms still come, less often, NASA notes. Under the oval it hardly matters, says Visit Tromsø. The cycle decides whether the lights reach Munich, not whether Tromsø sees them.

Where: four countries under one oval

At night the auroral oval runs along the coast of northern Norway, over Tromsø and Lofoten, and across the far north of Sweden and Finland. FMI counts auroras on three clear nights in four in northern Lapland; Northern Norway's tourist board says nine in ten.

Get away from street lights, and go inland when the coast is cloudy: Tromsø's chases cross the mountains into their rain shadow, sometimes 200 km and into Finland. Abisko sells its "blue hole", a pocket of clear sky that often holds when the land around it clouds over. On a strong night you need not leave town: Prestvannet lake in Tromsø, Grótta lighthouse in Reykjavík and Rovaniemi's riverbanks are dark enough.

In Svalbard's polar night, 11 November to 30 January, the oval passes overhead by day, and the lights can come out at lunchtime.

The places, and how to reach them

How to read the forecasts, and Kp without the jargon

Two forecasts decide the night, clouds and space weather, and clouds ruin more trips. All of these are free:

• The Icelandic Met Office's aurora forecast: a cloud map for the coming days, and activity from 0 to 9.
• The Finnish Meteorological Institute's space weather page: live magnetometer readings, yellow for possible auroras, red for very likely.
• NOAA's 30-minute aurora forecast: the oval on a globe, 30 to 90 minutes ahead.
• Norway Lights, Visit Norway's app, rates the aurora towns GO, TRY or WAIT. Visit Svalbard's gloss on GO: "Why are you spending time reading this?"
• My Aurora Forecast & Alerts sends an alert when activity is high. Hello Aurora pushes other people's sightings as they happen: the group chat, automated.

Kp is the number everyone quotes: how hard Earth's magnetic field is being shaken, from 0 to 9, over three hours. The higher it goes, the further south the lights reach: about two degrees of magnetic latitude per step, says NOAA. Kp 5 is officially a storm; May 2024 was a 9. Under the oval an ordinary night will do, which is how FMI gets to three clear nights in four. Reykjavík, further south, wants 3 or more. For the next hour, trust the 30-minute forecast instead.

Why your phone sees pink when you see grey

In the dark your eyes hand over to rod cells, which are sensitive but colour-blind, and poor at red, so a faint aurora looks like a pale grey cloud that will not keep still. Your phone's night mode has no such problem. It adds up a run of long exposures, as many as 15 frames of 16 seconds each for Google's Night Sight on a tripod, and the result, unlike human night vision, is in colour.

The green is oxygen around 100 km up; the red is oxygen higher still. The magenta photographed over Japan in May 2024 was, researchers found, red oxygen light mixed with blue from nitrogen at extreme altitudes.

For the shot, put the phone on something still, a tripod or a rock. Night mode on, flash off, focus on a distant light, and the timer on so your finger does not shake it. If the phone sees it and you do not, it still counts. Nobody in the group chat will ask.

What a night out costs in 2026–27

The small print matters more than the price. In Iceland a free retry is common: Reykjavík Excursions lets you rebook as often as it takes for two years, and Arctic Adventures' free retry stays valid for up to three years. In Tromsø, ask. Arctic Explorers answers the free-retry question in its FAQ with a flat "No" and advises booking chases on your first nights, leaving the spare ones for another go.

Nobody needs an expedition wardrobe: the minibus chases and the Sky Station lend the thermal suit, and usually the boots. The one thing worth buying is a small tripod or phone clamp.

The cold, and the phone battery

Tromsø, on the coast, averages −4°C in winter, but its tourist board tells aurora hunters to be ready for −25°C. Inland is colder: FMI puts Lapland's coldest winter nights at −45°C to −50°C. And the aurora is a spectator sport. You will stand still for hours.

Phones like it even less. Apple designs iPhones for 0 to 35°C; colder than that, the battery drains faster, the phone may switch itself off, and it may refuse to charge. A frozen phone on a frozen power bank gets you nothing.

One package for the whole chase

Norway, Sweden, Finland and Iceland are all on the Europe plan, along with the UK, Switzerland and the whole EU, so one package follows a chase from Norway into Finland. The Aurora Express night bus runs Tromsø–Kilpisjärvi–Levi–Rovaniemi from 7 December to 31 March, ten hours with stops for the lights, from NOK 3,000. SJ's night train from Stockholm runs through Kiruna and Abisko to Narvik, where buses leave for Tromsø, and VR's night train takes you from Rovaniemi to Helsinki. Three countries, three nights asleep on the move, one eSIM.

Who needs it, honestly? With an EU SIM you already roam at home prices in all four countries, within fair use: Norway and Iceland are in the European Economic Area, where the EU's roaming rules apply. The package is for visitors from the UK, Switzerland or the US, whose tariffs usually charge extra here, for small home allowances, and for the self-drive chase, where one phone's hotspot keeps the whole car on the cloud map.

The stories, and some manners

In Finnish the lights are revontulet, fox fires: a fox running across the fells, sweeping sparks into the sky with its tail. In Swedish folk belief a strong, crackling display foretold war, and further south some said it was light off great herring shoals in the North Sea. Children in northern Norway warn each other never to whistle or wave a white handkerchief at the lights, or they will come down and carry you away. Northern Norway's tourist board admits its writer tried it as a child, and survived.

The Sámi word is guovssahas. Tourist copy translates it as "the lights you can hear". Ole Henrik Magga, professor emeritus at the Sámi University of Applied Sciences and the first president of the Sámi Parliament, says it most likely comes from guovssu, dawn. Less colourful, and correct. For Sámi stories, go to the source, Siida in Inari or a Sámi guide, and follow their lead under the lights.