Northern Lights in October 2026: The Moon-Free Window

The Moon-free window: 8 to 18 October 2026

New moon on 10 October, six locations calculated

New moon: 10 Oct, 16:50 BST (UK) 7.4 h of full darkness in Tromsø on 10 Oct 0 to 5 °C in Tromsø Core window: nights of 8 to 18 Oct

The new moon falls on 10 October 2026 at 15:50 UTC, which is 16:50 in the UK (British Summer Time), according to the phase tables published by Fred Espenak (astropixels). For Tromsø, Abisko, Rovaniemi, Reykjavik, Fairbanks and Yellowknife, we calculated the hours when the Sun is more than 18° below the horizon and the Moon is below the horizon too. The result: from the evening of 8 October to the evening of 17 October, nights are completely Moon-free in all six places. On the 18th they still are in Tromsø, Abisko and Rovaniemi, and Reykjavik keeps 8 Moon-free hours.

The gain is clear. In Tromsø, astronomical night lasts about 5.8 hours on 1 October, 7.4 hours on the 10th and 10.2 hours on the 31st. On 1 September there was none at all. October is therefore the first month where the sky is dark enough for real chances, not September, despite the equinox.

What the window gives you

• A sky with no lunar competition: even a faint aurora stays easy to see.
• Nights of 7 to 9 hours at high latitudes, growing by about two hours every fortnight.
• Mild temperatures (0 to 5 °C in Tromsø) and unfrozen lakes that mirror the sky.

Pixidia tip: an ephemeris calculation says nothing about solar activity or cloud. It only defines the sky that’s available. To maximise your chances, get out of town: a minibus trip with a guide takes you to where the sky is clear, with no need to hire a car in the dark.

Northern Lights Minibus Chase from Tromsø, photos included €228-256 per adult (based on 2 adults) for nights from 8 to 18 October, dates open on 10 nights out of 11 as of 5 October · ★ 4.9 (1408 reviews)

Book my Moon-free aurora chase

The night-by-night calendar, 5 to 31 October

Here’s the window in one table. Times are for Tromsø (local time, one hour ahead of the UK), calculated with our ephemerides. On 25 October Europe goes back to winter time, and the UK clocks go back that night too, so Tromsø stays one hour ahead of London. Iceland doesn’t change its clocks.

The same calculation works as a template for Moon-free summer nights: it’s the angle of our guide to the Perseids 2026 under a Moon-free sky. Here, the polar night does the rest.

A supermoon on 26 October? No, and it’s not what matters

The full moon falls on 26 October 2026 at 04:12 UTC, which is 04:12 in the UK once the clocks have gone back. The reference lists don’t count it as a supermoon: Espenak, Sky at Night, EarthSky and Almanac only count three supermoons in 2026, on 3 January, 24 November and 24 December. That night the Moon is about 368,900 km from Earth, above the threshold used by those lists. Perigee comes on 28 October at 18:01 UTC, at about 364,400 km, two days later.

Some mainstream sites apply a looser criterion (a Moon at least 4% closer than average) and call it a supermoon. The term has no official astronomical definition: it comes from an astrologer’s definition in 1979. Above all, remember this: for an aurora, the Moon’s distance makes no difference. What counts is its phase and its height in the sky.

According to Aurora Forecast Iceland, moonlight mostly hides faint auroras, not strong ones. Photographers even find an upside: a lit-up landscape and a smaller aperture, as Ewen Bell describes. But to see anything of a modest aurora, the new moon is still unbeatable.

Equinox and solar cycle: what still matters in October

A fading plateau, not a peak

Equinox: 23 Sept, 00:05 UTC Smoothed maximum of cycle 25: Oct 2024 About 88 sunspots expected in Sept 2026 Cloud: enemy number one

The equinox. According to the Russell-McPherron effect, described in 1973, Earth’s magnetic axis lines up better with the solar field around the equinoxes, which favours magnetic reconnection and geomagnetic activity in March-April and September-October. Cliver and colleagues found more than twice as many large storms at the equinoxes as at the solstices over 1868-1998. But the equinox was on 23 September: by 10 October the peak is two and a half weeks behind us. The effect lingers as a plateau and raises a probability, never a certainty.

Solar cycle 25. According to the SIDC, the smoothed sunspot maximum dates from October 2024 (160.9). NASA expects about 88 for September 2026, within a range of 69 to 117. So the cycle is declining, but it isn’t over: the SIDC writes that further very active episodes remain possible over the next two years, and the Met Office points out that the strongest storms can occur after the maximum. On 20 January 2026 a storm reached -218 nT on the Dst index, according to SpaceWeatherLive.

In the declining phase, coronal holes take over: their streams of fast solar wind return roughly every 27 days and produce modest storms (G1 to G2). That’s the most likely scenario in October, as on 5 October, when the SWPC expected a G1 episode driven by a coronal hole.

Straight talk on cloud: October is the wettest month of the year in Tromsø, with about 15 rainy days, based on the 1991-2020 normals. Iceland is often overcast too. The best cloud maps count as much as the Kp index.

Where to go, depending on your profile

Five ways to use the window

London-Reykjavik: direct, about 3 h London-Tromsø: usually one change (Oslo) 4 nights recommended on the ground UK passport needed (no ID card, no visa)

Your profile	Nights	Where	Good to know
Best chances, 5 free days	8 to 16 Oct	Finnish Lapland (Saariselkä, Ivalo) or Abisko	Drier climate than the coast. As far as we know, there’s no direct London-Rovaniemi flight in October: expect a change, usually via Helsinki.
Long weekend from the UK	9 to 12 Oct	Tromsø or Reykjavik	Reykjavik is about 3 hours from London with direct flights. For Tromsø, the direct London flights are mainly a winter-timetable affair that begins on 25 October, so for this window expect to connect (Oslo is the usual hub) and check current schedules.
Landscape photographer	18 to 22 Oct	Lofoten, Tromsø, Iceland	Moon lights the foreground, then sets. Faint auroras get drowned out.
Can only go in late October	23 to 31 Oct	Tromsø, Abisko, Lapland	9.6 to 10.2 h of night, but Moon all night: only strong auroras are crisp. Direct London-Tromsø flights start to appear on the winter timetable.
From North America	8 to 16 Oct	Fairbanks (Alaska)	Skip Yellowknife: Destination Canada advises against early October to mid-November because of cloud.

Special cases

• Abisko: the « Blue Hole », a rain shadow created by the mountains, often brings clear skies when the Norwegian coast is clouded over. The Sky Station’s opening for night visits isn’t confirmed for the start of the window: check the STF page before building your plan around it.
• Tromsø: bus and minibus chases leave town for the interior or Finland. To compare the options, our guide to northern lights experiences in Tromsø breaks them down.
• Iceland: winter tyres, short days, and a new per-kilometre road charge since January 2026. Our guide to car hire in Iceland saves you from nasty surprises.
• Other places: for Senja, Svalbard, Inari or the Faroes, our northern lights 2026 overview covers the options.

Budget and logistics, in rough figures

All the prices below are « from » prices, checked on 5 October 2026 on public sites. They move with the date and demand: check them before you book.

• Flights: London-Reykjavik has direct flights of about 3 hours. For Tromsø, direct flights from London are tied to the winter timetable starting 25 October, so for the 8 to 18 October window plan on a change. Same for Rovaniemi. Prices swing a lot with the date: compare dates on a flight search before you commit.
• Northern lights chase in Tromsø: according to Visit Tromsø, from NOK 1,200 by bus and from NOK 1,759 by minibus, for evenings of 5 to 8 hours. Many operators offer another trip if nothing shows up: read the terms, it’s not a guarantee of an aurora.
• Entry rules: as a UK traveller you need a passport (an ID card won’t do) for Norway, Sweden, Finland and Iceland. It must have been issued less than 10 years before you arrive and be valid for at least 3 months after you leave the Schengen area, according to GOV.UK. No visa is needed for up to 90 days in any 180, and the EU’s Entry/Exit System may ask for fingerprints and a photo at the border. For Canada, the eTA costs CAD 7. For the United States, the ESTA costs $40.
• Gear: layered clothing, hand warmers, tripod, spare battery. Long exposure: widest aperture, a few seconds, ISO 1600 to 3200 as a rough guide.

Allow at least four nights in Tromsø to offset the cloud, as many travellers advise. According to Visit Rovaniemi, Finnish Lapland racks up about 150 aurora nights a year: the season starts there in late August, but it’s in October that the night turns properly dark.

Deciding the night before: three tabs to open

No serious forecast goes beyond a few hours to three days. So this guide won’t tell you « there will be an aurora on 12 October »: nobody knows. Instead, make this your routine each evening:

• Activity: the SWPC 3-day forecast gives the Kp index (G1 corresponds to Kp 5) and the 30-minute forecast helps with the last-minute call.
• Cloud: yr.no for Tromsø, and the Icelandic Met Office map (green: cloudy, white: clear sky) for Iceland.
• An alert app that combines Kp, cloud and Moon. None replaces the cloud map.

The SWPC also publishes a 27-day outlook based on the return of coronal holes. It’s an example of the method, not a forecast: it’s worthless several weeks out. Indicative thresholds from AuroraMe (a commercial source): Kp 1 is enough in Tromsø, Kp 2 in Abisko, roughly Kp 3 in Rovaniemi. With a clear sky, visibility decides, not the number.