Northern lights in Rebun Island tonight
Northern Hokkaido, Japan · 39° magnetic latitude · Kp 7-8 threshold
Kp 1 is well below the Kp 7-8 threshold needed for aurora to be visible from Rebun Island.
7-day outlook for Rebun Island
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Rebun Island sits at a magnetic latitude of approximately 39°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 7-8 before the auroral oval expands far enough south to be visible from here.
At Kp 7-8, visibility is possible from Rebun Island 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 Rebun Island
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Sukoton Cape (Sukoton Misaki)
Get directions ↗Sukoton Cape is the northernmost point of Rebun Island and the northernmost accessible point in Japan open to the public. From the cliff edge, the horizon faces north over the La Perouse Strait toward Sakhalin Island 43 km away. Bortle Class 1-2. There is no artificial light to the north, west, or east. The headland gives a full open sky in all directions above the sea. At Kp 7-8, aurora can appear low on the northern horizon from this position - the same threshold as Wakkanai on the mainland. A 30-40 minute drive from Kafuka on a single-lane island road. In winter (November to April), access conditions depend on snow; check locally before driving at night.
Momoiwa viewpoint
Get directions ↗The Momoiwa (Peach Rock) viewpoint on the west coast of Rebun gives an elevated position above the Sea of Japan. Bortle Class 2. The viewpoint faces west and southwest over open water. At Kp 7-8 aurora can appear in the northwest direction from this position. The car park is accessible year-round on the main island road. Less dramatic than Sukoton Cape in terms of northern horizon, but easier to reach and less exposed to north winds in winter. A practical first stop for aurora watching on arriving at the island before driving further north.
Funadomari north coast
Get directions ↗Funadomari is a small fishing community on the northern coast of Rebun Island, 5 km south of Sukoton Cape. The shore faces north over the strait. Bortle Class 1-2 - the village has minimal lighting and the few houses face away from the coast. The beach and headland at Funadomari give a ground-level position with the open strait ahead. In winter, this is a cold and exposed position - appropriate clothing and a vehicle with heating are required. The beach gives a flat foreground for wide-angle photography with aurora overhead.
Best time to see the northern lights in Rebun Island
At 39°N magnetic latitude, Rebun Island sits at the lower end of regular aurora territory. Only the deep mid-winter months of November through January offer nights dark enough for aurora to be visible, and only then when a significant geomagnetic storm pushes the auroral oval this far south.
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 Rebun Island's latitude.
Outside November through January, twilight is too bright for aurora viewing even during significant storms. The season is short, but the equinox months on either side of winter can extend it slightly when storm timing aligns.
Up to 8 locations
How often does the aurora appear in Rebun Island?
Average nights per month the Kp reached Rebun Island's threshold of 7+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 7+ 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 Rebun Island
Best window
The January to March window averages 0 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 January.
Related pages
Northern Lights Japan
Japan aurora hub - Hokkaido forecast and threshold guide.
Read →Northern Lights Wakkanai Tonight
Wakkanai - ferry departure point for Rebun Island, Kp 7-8 threshold.
Read →Northern Lights Rishiri Island Tonight
Rishiri Island - adjacent island, Rishiri-Fuji volcano backdrop.
Read →Northern Lights Alert
Push notifications when Kp 7 is reached - ideal for island visits.
Read →Japan Northern Lights Guide
Full guide to aurora in Japan - when, where, and realistic expectations.
Read →Planning your aurora trip
In-depth guides to help you plan a trip to see the northern lights.
Travel GuideJapanNorthern Lights Japan - Aurora Viewing Guide for Hokkaido
Wakkanai, Abashiri, and Hokkaido - where to see the northern lights in Japan, what Kp storm you need, and how to approach it as a winter trip bonus.
Travel GuideAll destinationsHow to Plan a Northern Lights Trip
Destination, timing, accommodation, app setup, and how to read a space weather forecast.
PlanningAll destinationsBest Time to See the Northern Lights
Month-by-month breakdown of aurora probability, darkness windows, and weather patterns.










