All locations Norway Sommarøy

Northern lights Sommarøy tonight

Sommarøy sits at ~69°N magnetic latitude on an island 36 km west of Tromsø. Kp 1–2 is the threshold. The west beach and Hillesøya headland give an open Polar Ocean horizon with Bortle Class 2 sky - substantially darker than Tromsø city for the same 40-minute drive. The outer island of Rebbenesøya, reached via a second bridge, gives Bortle Class 1-2 conditions. Best season: October to April.

Aurora visibility - Sommarøy

Possible tonight

Kp 1 is at the threshold for Sommarøy. Aurora may be visible from a dark site if cloud cover permits.

Current Kp

1

of 9

Threshold for Sommarøy: Kp 1–2 Magnetic latitude: ~69°N Updated: 3 Jun, 18:13 UTC
↓ Bz nT Solar wind km/s Density p/cm³
Conditions right now: Kp + Bz + solar wind + cloud + moon

7-day outlook for Sommarøy

Today

3 Jun

Quiet

Tomorrow

4 Jun

Quiet

Fri

5 Jun

Quiet

Sat

6 Jun

Quiet

Sun

7 Jun

Quiet

Mon

8 Jun

Quiet

Tue

9 Jun

Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

auroratonight.space

What Kp is needed here?

Sommarøy sits at a magnetic latitude of approximately 69°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 1–2 before the auroral oval expands far enough south to be visible from here.

At Kp 1–2, visibility is possible from Sommarøy 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 Sommarøy

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Sommarøy west beach

Get directions ↗
Bortle Class 2 - Excellent dark sky 1 km from Sommarøy village - approximately 15 minute walk to the western headland

The west-facing beach on Sommarøy gives an open Polar Ocean horizon with no settlement to the north or west. Road lighting ends at the village and the beach itself is unlit. Bortle Class 2 from the beach. Aurora appears above the dark water to the north and northwest. The white sand - unusual in Arctic Norway - gives a reflective foreground surface when snow is absent. The beach is accessible year-round via the sealed road from the bridge. In calm conditions the sea surface gives aurora reflections. No facilities at night; bring appropriate clothing, as the exposed western coast is colder than sheltered positions inland.

Hillesøya north coast

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Bortle Class 2 - Excellent dark sky 5 km north of Sommarøy village - approximately 10 minute drive across the bridge to Hillesøya

Hillesøya is connected to Sommarøy by a short road bridge. The northern coastline faces directly over the Polar Ocean with no further land to the north before Svalbard. Bortle Class 2. The headland positions give a clean northern horizon at sea level. In calm conditions the fjord surface provides aurora reflections. Less visited than the main Sommarøy beach - the road across Hillesøya reduces to single track and ends at the coast. A practical extension from a Sommarøy base for those with a hire car and time to explore the outer island.

Rebbenesøya island

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Bortle Class 1-2 - Exceptional dark sky 15 km northwest of Sommarøy - approximately 25 minute drive via Hillesøya and the Rebbenesøy bridge

Rebbenesøya is reached via Hillesøya across a second bridge and is the outermost island in the chain west of Tromsø. It has the least light pollution of any easily accessible position in the area. Bortle Class 1-2. The island has a small permanent population and the road ends at the north coast. From the northern shore the horizon is fully open over the Polar Ocean. On nights when Tromsø city centre shows a faint aurora arc, Rebbenesøya gives the full display with no competing light from the city. The extra 15 km from Sommarøy takes around 25 minutes and represents a meaningful improvement in sky darkness over an already-dark baseline.

Best time to see the northern lights in Sommarøy

At 69°N magnetic latitude, Sommarøy 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 Sommarøy'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.

Compare nearby locations

Up to 4 locations

Sommarøy

Norway

Possible
Kp 1 need Kp 1-2
Checking darkness…
Tromsø

Norway

Possible
Kp 1 need Kp 1-2
Checking darkness…
Kvaløya

Norway

Possible
Kp 1 need Kp 1
Checking darkness…

How often does aurora appear in Sommarøy?

Average nights per month when Kp reaches 1+ - based on 15 years of data

24.8
27.3
28.6
16.4
31.1
25.0
22.6
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best month

October

Average aurora nights per year

176

Kp threshold

1+

Based on 15 years of geomagnetic data (2010-2024). Shows nights when Kp reached 1+ at any point in the day - cloud cover and local darkness not included. Months with no astronomical darkness show zero.

Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0

Plan your trip to Sommarøy

Based on 15 years of geomagnetic data

1st

October

31.1

avg aurora nights

Requires an extended stay

2nd

March

28.6

avg aurora nights

Stay 1+ nights for 80% chance

3rd

February

27.3

avg aurora nights

Stay 1+ nights for 80% chance

Best window

The January to March window averages 81 aurora nights - the strongest consecutive stretch of the year.

How long to stay

Aurora at this latitude requires patience - allow as many nights as possible during October.

Common questions

Aurora watching at Sommarøy - comparing it to Tromsø city and using the outer islands.

What makes Sommarøy a better aurora position than Tromsø city?
Tromsø city centre has significant light pollution from street lighting, buildings, and the university campus. Aurora visible from the city centre is typically already Kp 2-3 or higher. Sommarøy is 36 km west of Tromsø by road, sits at 69°N magnetic latitude, and has Bortle Class 2 sky from the beach and headland positions. At Kp 1-2, faint aurora that is difficult to distinguish from Tromsø city appears clearly above the open water to the north. The drive is 40 minutes from Tromsø - a practical improvement for any planned aurora outing that does not require staying in the city.
What Kp is needed for aurora at Sommarøy?
Kp 1–2 from the west beach and Hillesøya headland positions. The Kp index measures global geomagnetic activity on a 0-9 scale, updated every 3 hours. At 69°N magnetic latitude, Kp 1 can produce a faint arc on a clear night from a dark position. Kp 2 gives a structured display visible to the north and overhead. Kp 3+ produces movement and colour across the sky. The island has no significant artificial light to the north, so low-level activity registers more clearly than from Tromsø city.
How do I get to Sommarøy from Tromsø?
Take the Rv658 west from Tromsø across Tromsøya and Kvaløya, then follow the road to Sommarøy. The total drive is approximately 36 km and takes 40 minutes. The road is sealed and maintained year-round including winter. A hire car is needed - there is no late-night bus service to Sommarøy. The island bridge is passable in all weather conditions except the most severe winter storms. Parking is available near the beach and at the village centre.
When is aurora season at Sommarøy?
October to April. Sommarøy experiences the midnight sun from late May to mid-July, during which the sky is never dark enough for aurora. Darkness returns in late July but the aurora window opens reliably from late September. December and January give the longest periods of darkness, with civil twilight ending around 2pm and not returning until 10am. March is often recommended as a practical compromise: genuine darkness for 8-10 hours, statistically higher geomagnetic activity around the spring equinox, and marginally better settled weather than midwinter.
Is Sommarøy suitable for aurora photography?
Yes. The white sand beach and open water foreground are unusual in an Arctic aurora location. Reflections appear on calm sea and fjord surfaces. The island is low-lying and lacks the dramatic mountain silhouettes found in Lofoten and the Lyngen Alps - the main photographic elements are the sea horizon, the beach, and the boat jetties in the village. A wide-angle lens between 14 mm and 24 mm covers most positions. Long exposures of 15-25 seconds at ISO 1600-3200 and f/2.8 or wider suit most aurora brightness levels from this site.

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