All locations Japan Rishiri Island

Northern lights Rishiri Island tonight

Rishiri Island sits at 45° magnetic latitude in northern Hokkaido, accessible by ferry from Wakkanai (approximately 2 hours). The Kp threshold is 5-6. The island centres on Rishiri-Fuji, a 1,721 m volcanic cone visible from every position on the island - aurora over the open Japan Sea with the volcano silhouette behind is a foreground specific to this location. Set a push notification before you travel. Best season: October to March.

Aurora visibility - Rishiri Island

Unlikely tonight

Kp 1 is well below the Kp 5–6 threshold needed for aurora to be visible from Rishiri Island.

Current Kp

1

of 9

Threshold for Rishiri Island: Kp 5–6 Magnetic latitude: ~45°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 Rishiri Island

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?

Rishiri Island sits at a magnetic latitude of approximately 45°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 5–6 before the auroral oval expands far enough south to be visible from here.

At Kp 5–6, visibility is possible from Rishiri 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 Rishiri Island

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

Otatomari Pond

Get directions ↗
Bortle Class 2 - Excellent dark sky 5 km from Oshidomari port - approximately 10 minute drive

Otatomari Pond is a small lake on the south coast of Rishiri Island, directly below the Rishiri-Fuji volcano (1,721 m). The pond reflects the volcano's conical summit in calm conditions - in daylight this is one of the most photographed views in Hokkaido. At night, with aurora active, the combination of the volcano silhouette and the sky reflection gives a composition available nowhere else in Japan. Bortle Class 2. The car park is lit but the far shore of the pond gives a dark position. The water is accessible from the main island road year-round.

Senhoshi Cape

Get directions ↗
Bortle Class 1-2 - Exceptional dark sky 10 km from Oshidomari port - approximately 18 minute drive

Senhoshi Cape on the western coast faces the Japan Sea with no land visible to the west or north. Bortle Class 1-2. The cliff-top positions above the cape give an elevated view over open ocean. Rishiri-Fuji rises behind to the east as a dark silhouette. At Kp 5, aurora appears above the western horizon over the sea. The cape road is accessible by car; the final section to the headland may require walking on foot in winter conditions. Cold and exposed - wind from the northwest is common in winter and significantly increases wind chill.

Kutsugata Cape north shore

Get directions ↗
Bortle Class 2 - Excellent dark sky 8 km from Oshidomari port - approximately 14 minute drive

The north shore of Kutsugata Cape faces across the La Perouse Strait in the direction of Sakhalin Island. Bortle Class 2. The low coastal terrain gives an unobstructed northern horizon - the most important direction for aurora at this latitude. Rishiri-Fuji is visible behind and to the south, providing a landscape reference. The harbour at Kutsugata is small and has minimal lighting. Combined with Senhoshi Cape on the west coast, this gives two distinct aurora photography positions within 20 minutes of each other on the island road.

Best time to see the northern lights in Rishiri Island

At 45°N magnetic latitude, Rishiri 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 Rishiri 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.

Compare nearby locations

Up to 4 locations

Unlikely
Kp 1 need Kp 5-6
Checking darkness…
Wakkanai

Japan

Unlikely
Kp 1 need Kp 5-6
Checking darkness…
Rebun Island

Japan

Unlikely
Kp 1 need Kp 5-6
Checking darkness…

How often does aurora appear in Rishiri Island?

Average nights per month when Kp reaches 5+ - based on 15 years of data

1.2
1.3
1.6
1.4
1.2
1.0
1.2
1.4
1.5
1.5
1.2
1.1
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best month

March

Average aurora nights per year

16

Kp threshold

5+

Based on 15 years of geomagnetic data (2010-2024). Shows nights when Kp reached 5+ 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 Rishiri Island

Based on 15 years of geomagnetic data

1st

March

1.6

avg aurora nights

Requires an extended stay

2nd

September

1.5

avg aurora nights

Requires an extended stay

3rd

October

1.5

avg aurora nights

Requires an extended stay

Best window

The August to October window averages 4 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 March.

Common questions

Aurora at Rishiri Island - Rishiri-Fuji backdrop, ferry logistics, and comparing with Rebun Island.

What makes Rishiri Island distinctive for aurora?
Rishiri-Fuji, the near-perfectly conical dormant volcano at 1,721 m that dominates the island, is the defining photographic element. Aurora over the open Japan Sea to the west, with the volcano rising against the eastern sky, creates a foreground that does not exist anywhere else in Japan. The island sits at 45° magnetic latitude - Japan's highest accessible position alongside Rebun Island to the north - with a Kp 5-6 threshold. Sky darkness at Bortle Class 1-2 from the cape and coast positions completes the combination.
What Kp is needed for aurora at Rishiri Island?
Kp 5-6 from the dark coastal positions. The Kp index measures global geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours. At 45° magnetic latitude, Kp 5 is enough for a visible display facing north from a dark site. Kp 6 produces a more active display visible in multiple directions. Strong Kp 5-6 events occur roughly 20-30 times per year and several have produced visible aurora from northern Hokkaido during the current solar maximum. It is not a nightly event.
How do I get to Rishiri Island?
Ferry from Wakkanai port on the Hokkaido mainland to Oshidomari, the main port on Rishiri Island. The ferry takes approximately 1 hour 40 minutes to 2 hours depending on the service. Heartland Ferry operates this route; in winter the timetable is reduced. A second, shorter crossing (45 minutes) connects Rishiri to Rebun Island for combined itineraries. Wakkanai is accessible by train from Sapporo (5-6 hours) or via Memanbetsu Airport near Abashiri. Most island visitors stay 1-2 nights given the ferry schedule.
How does Rishiri compare to Rebun Island for aurora?
The magnetic latitude and Kp threshold are identical at both islands - both sit at 45°N with a Kp 5-6 requirement. The difference is landscape. Rebun is a flat flower island with no prominent mountain - the best aurora position is Sukoton Cape at the northern tip, with a pure sea horizon. Rishiri has Rishiri-Fuji as a central element in every view - the volcano backdrop is the foreground advantage. Otatomari Pond gives a reflection composition that Rebun cannot match. The choice between islands depends on whether you want a sea horizon (Rebun) or a volcano backdrop (Rishiri).
How do I stay informed about aurora conditions at Rishiri?
Set up a push notification at /northern-lights-alert with a Kp 5 threshold before you travel. Island visits require ferry booking in advance and at least 2 nights to allow for weather contingency. Having the alert configured means you will know within minutes when a Kp 5 event begins - enough time to drive to Senhoshi Cape or Kutsugata. In winter, check the Heartland Ferry schedule for last crossing times, as the ferry does not run 24 hours and sea conditions can cause cancellations.

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