Japan
Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
0.72km²
Area
5km
Coastline
100m
Highest point
28°C
Warmest sea
August
352km
To the mainland
When to go to Ōkunoshima
Best for the beach from July to October.
The sea is warmest in August (28 °C) and coolest in February (13 °C). Comfortable swimming (21 °C or more): from June to October.
Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.
Japanese island with a population of feral rabbits
Ōkunoshima is an island in Japan. It covers 0.72 km², with 5 km of coastline. Its highest point rises to 100 m. The nearest mainland is 352 km away.
Getting there
- Hiroshima Airport (HIJ)nearest airport with scheduled flights · 16 km in a straight lineCar hire at KCZ airport (Nankoku)Discover Cars · Affiliate link↗
- FerriesKyukamura Ship(Tadanoumi-Ohkunosima), Ōmishima Ferry(Tadanoumi-Ōkunosima-Sakari), Ōmishima Ferry (Tadanoumi-Ōkunosima-Sakari)
- 352 km from the mainlanddistance to the nearest continental coast
- From July to Octoberbest months to go (from 30 years of averages)
Plan the trip
Ferries, stays and things to do
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
On the island
What you find on Ōkunoshima.
- 2viewpointsFactory Ruins
- 2lighthousesŌkunoshima Lighthouse
- 2ferry terminalsOkunoshima Pier 2, Okunoshima Pier 1
- 4castles and fortsCentral Battery Ruins, Northern battery ruins, Southern battery ruins and 1 more
- 9ruins and archaeological sitesRemains of the control tower, Remains of Nagaura Poison Gas Storehouse, Remains of the Sangenya Poison Gas Storehouse and 6 more
- 1campsites
- 1hotels, guesthouses and apartments
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
The shape of the land.
On average the island stands 33 m above the sea. 100 % of it is below 200 m.
- 78 %0–50 m
- 22 %50–200 m
Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).
Size, for real
Next to islands you may know.
0.2 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 7 | 8 | 12 | 18 | 22 | 26 | 29 | 30 | 26 | 21 | 15 | 9 |
| Night low (°C) | 0 | 0 | 3 | 7 | 12 | 17 | 22 | 23 | 19 | 13 | 7 | 2 |
| Sea (°C) | 14 | 13 | 13 | 15 | 18 | 22 | 25 | 28 | 26 | 24 | 20 | 17 |
| Rain (mm) | 60 | 74 | 104 | 118 | 142 | 208 | 240 | 127 | 179 | 121 | 76 | 79 |
| Wet days | 10 | 10 | 12 | 11 | 11 | 14 | 16 | 12 | 14 | 10 | 9 | 11 |
| Sun h/day | 3.9 | 4.3 | 5.4 | 6.3 | 6.6 | 5.1 | 5.6 | 6.9 | 5.3 | 5.2 | 4.4 | 3.6 |
| Wind (km/h) | 16 | 15 | 15 | 14 | 12 | 10 | 11 | 11 | 12 | 13 | 13 | 16 |
Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.
Recent years
Warmer and cooler years at sea.
Each month's sea temperature compared with its 1991–2020 average, in degrees.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | −1.6 | −1.7 | −1.6 | −1.5 | −0.8 | +0.1 | +1.1 | +0.9 | +0.7 | +0.3 | +0.9 | +1.2 |
| 2021 | −1.3 | +0.2 | −0.4 | +0.3 | +0.3 | +0.2 | +0.5 | +0.7 | +0.9 | +1.2 | −0.3 | −1.4 |
| 2022 | −2.8 | −3.4 | −2.2 | −0.3 | −0.2 | ±0.0 | +0.8 | +1.0 | +1.5 | +1.0 | +0.3 | +0.3 |
| 2023 | −2.1 | −2.3 | −1.2 | −0.4 | ±0.0 | −0.5 | +0.4 | +0.4 | +1.4 | +0.6 | +0.8 | −0.4 |
| 2024 | −1.1 | −1.2 | −2.0 | +0.1 | +0.1 | −0.3 | +0.9 | +1.6 | +2.4 | +2.2 | +1.0 | −0.8 |
| 2025 | −2.2 | −1.8 | −2.0 | −1.4 | −0.7 | +0.2 | +1.2 | +1.1 | +1.8 | +2.1 | +1.5 | −0.3 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
About these numbers
| Names, area, population | Wikidata (Q385313) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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