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Oct 23, 2026

Aurora oval and Finland: why Rovaniemi sits under the lights

When guests ask us why Lapland is such a good place for the Northern Lights, the honest answer is geography – or, more precisely, geomagnetism. Auroras are not spread evenly over the sky of the whole planet. They appear in a ring-shaped zone around each magnetic pole, known as the aurora oval, and northern Finland happens to lie right at its edge.

In this article we explain what the aurora oval is, where Finland sits on it according to the Finnish Meteorological Institute (FMI), what changes when the oval grows during geomagnetic storms, and how all of this shapes the way we run our Northern Lights tours from Rovaniemi.

Short answer: the aurora oval is a band around the Earth’s geomagnetic pole where the Northern Lights occur most often. The FMI states that Finland is on the southern rim of the auroral oval. That is why auroras are frequent in Lapland – the FMI estimates roughly half of all nights in central Lapland and 75 % of nights at Kilpisjärvi in the far north-west – but rare on the south coast, where they are seen about once a month on average. When geomagnetic activity rises, the oval expands southwards and the lights reach further south.

At a glance

• From: 99 €
• Experience type: Northern Lights tour / activity
• Duration: 3 hours
• Difficulty: Very easy
• Book in Advance: Cut off: 3 hours before start time
• Included: A Tour Guide in English (other languages available on request: (Spanish, Portuguese, French, Italian, German & Finnish. PLEASE NOTE LIMITED AVAILABILITY FOR OTHER LANGUAGES) If another language is required. Please send us an email or WhatsApp after booking.); Winter clothing (Adult & Child size), overalls, boots, gloves, socks; Local Snack & Drinks by the campfire; Information about the Northern Lights; Pick-ups and drop-offs are included in the price in 10 km radius from Rovaniemi city center; Photos taken with your own device; Air conditioned car
• Cancellation: Free cancellation 24 hours before the activity. We will charge a cancellation fee of 100% if booking is cancelled less than 24 hours before the activity.
• Accessibility: Not wheelchair accessible; Not stroller accessible

What the aurora oval is

The Northern Lights (aurora borealis) and Southern Lights (aurora australis) are caused by electrons colliding with the upper atmosphere. The electrons transfer their energy to atoms and molecules, which then release it as light. NOAA’s Space Weather Prediction Center puts the typical height of the aurora at 80 to 500 km above the Earth’s surface.

Earth’s magnetic field guides these electrons, so the aurora forms two ovals, approximately centred on the magnetic poles – one in the north and one in the south. According to NOAA, the best place to observe the aurora is under this oval-shaped region, between latitudes of about 60 and 75 degrees. The FMI describes the same thing in simple words: the Northern Lights form an oval band around the geomagnetic poles of the Earth.

The important detail is that the oval is centred on the magnetic pole, not the geographic North Pole. That is why being very far north is not automatically better: what matters is how close you are to the oval.

Where Finland sits on the oval

The FMI states it plainly: Finland is on the southern rim of the auroral oval. That position creates a clear gradient across the country, and the FMI gives these figures for how often auroras occur:

• Kilpisjärvi, in the far north-west: 75 % of nights
• Lapland (FMI’s examples are the ski resorts Ylläs, Levi and Saariselkä): roughly 50 % of nights
• Central Finland (e.g. Oulu, Kuusamo): roughly 25 % of nights
• The south coast (e.g. Helsinki, Turku): once a month on average

Rovaniemi lies between the central-Lapland and Oulu examples on that list, which is why we do not quote a single percentage for the city. What the figures show is the trend: the further north you go in Finland, the closer you are to the oval and the more often it lights up above you. Remember too that these are occurrence figures – you still need darkness and a clear enough sky to actually see them.

When the oval grows: geomagnetic storms

The oval is not fixed in size. NOAA explains that during major geomagnetic storms the ovals expand away from the poles, which is when auroras can be seen much further south than usual. The FMI says the same for Finland: during geomagnetic storms the auroral oval expands southward, and then auroras are seen in central and southern Finland too.

For Lapland this works in our favour in two ways. On quiet nights we are still close enough to the rim to see activity, and on active nights the oval can move right overhead. The FMI notes that in Lapland auroras are quite common always, even during solar minimum, and that the effect of the solar cycle is most pronounced in southern Finland. We wrote more about the cycle in our article on solar maximum and the Northern Lights 2026.

Season and time of night

Being under the oval is only half the story – you also need a dark sky. The FMI notes that auroras occur quite evenly throughout the year, with a slightly higher rate around spring and autumn. In summer, however, Lapland’s nights are too light to see them, because around midsummer the sun does not set at all.

The FMI names February–March and September–October as the best months, and says the best time for seeing auroras in northern Finland is in March and early April. We explain why the months around the equinoxes are so active in our article on the equinox aurora. As for the time of night, the FMI gives 9 p.m.–1 a.m. local time as the best window, and notes that displays typically centre on midnight, with activity a couple of hours before and after.

Why clouds and light matter more than latitude on a given night

Once you are in Lapland, the oval takes care of itself on many nights. What decides whether you actually see anything is the local sky: the FMI’s observing advice rests on the sky being clear enough of clouds. The lights of a city also make faint auroras harder to see, which is why aurora watchers look for dark spots outside built-up areas.

This is where local knowledge helps. Clouds can cover one valley and leave the next one open, and a display can build and fade within minutes. Our guide to aurora hunting in Rovaniemi goes through the practical side.

How this shows up on our tours

Everything above explains why we run Northern Lights tours from Rovaniemi throughout the dark season – and also why we are honest that nobody controls the sky. We offer two kinds of evenings.

On our Northern Lights Tour At The Campfire (from 99 €, 3 hours) we pick you up from your accommodation (included within a 10 km radius of Rovaniemi city centre), give you warm winter clothing and take you to our own Northern Lights viewing spot. While waiting you sit by the campfire in a teepee with a local snack and a hot drink, and the guide tells you about the Northern Lights. If the auroras appear, you have an open view; if the sky stays closed, you have still had a relaxed evening in the Finnish wilderness. Our Northern Lights Tour in Atmospheric Cottage (from 109 €) works the same way at a traditional lakeside cottage about 20 minutes from the city.

If seeing the lights is the main goal, our hunting tours move with the weather instead of waiting in one place. On the Professional Small Group Northern Lights Hunting Tour from Rovaniemi – Guaranteed (from 199 €, 2–8 persons) and the Professional Guaranteed Northern Lights Hunting Tour from Rovaniemi by Bus (from 109 €), our guides study cloud forecasts and aurora activity each evening and choose the direction with the clearest skies. Both include professional photos and a Northern Lights guarantee: if we don’t capture Northern Lights, you get 100 % of your money back.

Choose the campfire or the hunt?

Choose the campfire tour if you want a short, very easy evening with the chance of auroras and a warm place to wait – it is the calmer option. Choose one of the hunting tours if you are ready for a longer night: the product pages note that aurora hunting involves a lot of driving and waiting and requires patience, and the small-group tour typically lasts 4–10 hours depending on conditions. One more honest note from those pages: the Northern Lights look stronger on camera than to the naked eye.

Frequently asked questions

What is the aurora oval?

It is the ring-shaped zone around each of the Earth’s geomagnetic poles where auroras occur most often. NOAA describes the best viewing area as lying roughly between 60 and 75 degrees latitude.

Is Finland inside the aurora oval?

The Finnish Meteorological Institute states that Finland is on the southern rim of the auroral oval. Northern Finland is therefore close to it, and during geomagnetic storms the oval expands southward over more of the country.

How often are the Northern Lights seen in Lapland?

The FMI estimates roughly 50 % of nights in Lapland (for example Ylläs, Levi and Saariselkä) and 75 % of nights at Kilpisjärvi. You also need darkness and a clear enough sky to see them.

Why can’t I see auroras in Lapland in summer?

Auroras still occur, but according to the FMI the summer nights are too light, and around midsummer the sun does not set at all in Lapland.

What time of night is best?

The FMI gives 9 p.m.–1 a.m. local time as the best window, with displays typically centred around midnight.

Do your Northern Lights tours guarantee a sighting?

Our campfire and cottage tours do not guarantee auroras. Our Professional Guaranteed hunting tours include a Northern Lights guarantee: if we don’t capture Northern Lights, you get a 100 % refund.

Is pick-up included on the campfire tour?

Yes. Pick-ups and drop-offs are included within a 10 km radius of Rovaniemi city centre, including from Postmaster Hotel and Aurora Hill Resort.

Ready to book?

You may also like

• Professional Small Group Northern Lights Hunting Tour from Rovaniemi – Guaranteed — from 199 €, Total duration of tour is usually 4-10 hours depends on conditions of the day
• Professional Guaranteed Northern Lights Hunting Tour from Rovaniemi by Bus — from 109 €, Total duration of tour is usually 4-5 hours depends on conditions of the day
• Northern Lights Tour in Atmospheric Cottage — from 109 €, 3 hours

Sources

• Finnish Meteorological Institute – Auroras in Finland
• Finnish Meteorological Institute – Northern lights
• FMI Space and Earth Observation Centre – Auroras in Finland
• NOAA Space Weather Prediction Center – Aurora