JapanJapanese archipelagoIslandUNESCO World Heritage
Okinoshima
0.94 km² of land in the Korea Strait.
Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
0.94km²
Area
8km
Coastline
244m
Highest point
1
People
27°C
Warmest sea
August
130km
To the mainland
When to go to Okinoshima
Best for the beach from July to October.
The sea is warmest in August (27 °C) and coolest in March (14 °C). Comfortable swimming (21 °C or more): from July 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.
Island in Fukuoka, Japan
Okinoshima is an island in Japan. It belongs to Japanese archipelago. It covers 0.94 km², with 8 km of coastline. Its highest point rises to 244 m. About 1 people live on it. The nearest mainland is 130 km away. It is part of a UNESCO World Heritage site.
Getting there
- Iki Airport (IKI)nearest airport with scheduled flights · 63 km in a straight lineCar hire at FUK airport (Fukuoka)Discover Cars · Affiliate link↗
- 130 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 Okinoshima.
- 2lighthouses
- 1named peaksIchinodake
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 88 m above the sea. 96 % of it is below 200 m.
- 32 %0–50 m
- 65 %50–200 m
- 4 %200–500 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.
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) | 10 | 11 | 13 | 16 | 19 | 22 | 26 | 28 | 25 | 22 | 18 | 13 |
| Night low (°C) | 8 | 8 | 10 | 14 | 17 | 21 | 25 | 27 | 24 | 20 | 15 | 10 |
| Sea (°C) | 16 | 14 | 14 | 15 | 18 | 21 | 24 | 27 | 26 | 23 | 21 | 18 |
| Rain (mm) | 66 | 84 | 124 | 166 | 189 | 258 | 335 | 242 | 218 | 104 | 87 | 71 |
| Wet days | 9 | 9 | 12 | 11 | 11 | 15 | 18 | 17 | 14 | 9 | 10 | 9 |
| Sun h/day | 3.0 | 4.0 | 5.3 | 6.2 | 6.5 | 5.0 | 5.5 | 6.8 | 5.2 | 5.3 | 4.2 | 3.2 |
| Wind (km/h) | 27 | 25 | 24 | 22 | 19 | 18 | 18 | 19 | 23 | 24 | 23 | 27 |
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 | +0.9 | +0.9 | +0.7 | +0.3 | +0.2 | +0.9 | −0.6 | +0.3 | ±0.0 | −0.6 | +0.5 | +0.3 |
| 2021 | +0.4 | +1.4 | +1.0 | +1.7 | +1.1 | +1.5 | +1.4 | +0.1 | +0.5 | +2.1 | +0.5 | +0.4 |
| 2022 | +0.1 | −0.3 | +0.5 | +1.5 | +1.4 | +0.8 | +2.1 | +1.4 | +0.9 | +0.6 | +0.3 | +0.7 |
| 2023 | +0.2 | +0.5 | +1.7 | +1.9 | +0.9 | +1.4 | +1.4 | +0.6 | +1.5 | +0.7 | +1.1 | +1.0 |
| 2024 | +0.5 | +0.4 | +0.6 | +1.6 | +1.3 | +1.2 | +1.0 | +2.6 | +2.9 | +1.5 | +0.6 | +0.1 |
| 2025 | −0.3 | −0.7 | −0.6 | −0.3 | −0.3 | +0.4 | +2.1 | +1.9 | +3.1 | +2.5 | +1.3 | +0.9 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
Tsushima IslandJapan694 km²649 m73 km away
Iki IslandJapan134 km²213 m63 km away
KyushuJapan36,782 km²1,791 m161 km away
Hirado IslandJapan164 km²535 m110 km away
Geojedo
South Korea386 km²580 m152 km away
Hashima IslandJapan0.07 km²32 m183 km away
ItsukushimaJapan30 km²535 m202 km awayEtajimaJapan91 km²318 m214 km awayAbout these numbers
| Names, area, population | Wikidata (Q7082047) · 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.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
Find your beach: sea temperature, sun and swimming month by month.Visit 
lakes
Every lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit 
mountains
Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit 
waterfalls
Every waterfall: height, flow month by month and when it roars.Coming soonVisit 
islands
Every island from the sea up: size, sea temperature, ferries and 3D.You are here
rivers
Every river from source to sea: the journey, the flow and the basin in numbers.Visit 
canyons
Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Visit