Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
90.8km²
Area
65km
Coastline
764m
Highest point
Mount Mihara
8,514
People
26°C
Warmest sea
August
903km
To the mainland
When to go to Izu Ōshima
Best for the beach from July to October.
The sea is warmest in August (26 °C) and coolest in February (16 °C). Comfortable swimming (21 °C or more): from June to November.
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 Tokyo, Japan
Izu Ōshima is an volcanic island in Japan. It covers 90.8 km², with 65 km of coastline. Its highest point, Mount Mihara, rises to 764 m. About 8,514 people live on it. The nearest mainland is 903 km away.
Getting there
- Oshima Airport (OIM)airport on the island, with scheduled flightsCar hire at HND airport (Tokyo)Discover Cars · Affiliate link↗
- FerriesTokai Steam Ship Route
- 903 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
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On the island
What you find on Izu Ōshima.
- 10beachesSanohama beach and 9 more
- 24viewpointsIshi no soribashi (Stone arch), Mt. Mihara peak lookout, West crater lookout and 21 more
- 4lighthouses
- 2ferry terminals
- 9named peaksMt. Miharashinzan, Mt. Kengamine, Mt. Shiroishi and 6 more
- 4volcanoesB1, B2 and 2 more
- 2waterfallsShonin Waterfall
- 1ruins and archaeological sites
- 1dive centres
- 7waymarked walking routesAdventure Trail, Summit Trail, Easy Trail and 4 more
- 2campsitesUmi no furusatomura (Uni no furusato village)
- 34hotels, guesthouses and apartments
- 35restaurants, cafés and bars
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 254 m above the sea. 46 % of it is below 200 m.
- 15 %0–50 m
- 31 %50–200 m
- 42 %200–500 m
- 12 %500–1,000 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.
10 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Towns on the island
- Ōshima7,102 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 12 | 13 | 15 | 17 | 20 | 22 | 26 | 27 | 26 | 23 | 19 | 15 |
| Night low (°C) | 10 | 10 | 12 | 15 | 19 | 21 | 25 | 26 | 25 | 21 | 17 | 13 |
| Sea (°C) | 17 | 16 | 16 | 18 | 20 | 22 | 24 | 26 | 26 | 24 | 22 | 19 |
| Rain (mm) | 90 | 104 | 160 | 178 | 199 | 255 | 221 | 161 | 238 | 259 | 136 | 98 |
| Wet days | 7 | 9 | 13 | 13 | 14 | 16 | 16 | 15 | 17 | 15 | 12 | 9 |
| Sun h/day | 4.7 | 4.7 | 5.2 | 5.6 | 5.8 | 4.3 | 5.9 | 7.2 | 5.3 | 4.0 | 4.1 | 4.5 |
| Wind (km/h) | 30 | 28 | 28 | 26 | 22 | 21 | 21 | 19 | 23 | 26 | 26 | 30 |
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 | +1.8 | +2.0 | +1.1 | +0.6 | +0.1 | +1.2 | +0.1 | +1.3 | +1.6 | +1.1 | +1.3 | +1.9 |
| 2021 | +1.7 | +1.4 | +1.1 | +0.7 | +0.2 | +1.7 | +1.7 | +1.1 | +1.2 | +1.8 | +1.1 | +0.4 |
| 2022 | +0.6 | +1.7 | +1.1 | +0.8 | +1.0 | +0.9 | +1.1 | +0.7 | +1.6 | +1.3 | +1.9 | +1.2 |
| 2023 | +1.5 | +2.1 | +1.8 | +1.7 | +1.0 | +0.8 | +0.9 | +1.5 | +1.7 | +1.4 | +1.4 | +0.2 |
| 2024 | +2.2 | +1.8 | +0.9 | +1.4 | +0.7 | +1.3 | +1.7 | +2.7 | +2.3 | +2.5 | +2.6 | +1.3 |
| 2025 | +1.2 | +0.7 | +0.5 | ±0.0 | −0.2 | +1.9 | +2.4 | +0.1 | +0.6 | +1.0 | −0.4 | +0.9 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
Nii-jima
Japan23 km²432 m42 km away
EnoshimaJapan0.39 km²60 m63 km away
MiyakejimaJapan55 km²815 m75 km away
OdaibaJapan3.4 km²21 m105 km away
HonshuJapan230,426 km²3,777 m189 km away
Mikura-jimaJapan21 km²851 m98 km away
Hachijō-jimaJapan69 km²854 m185 km away
Chubu Centrair International AirportJapan6.3 km²5 m237 km awayAbout these numbers
| Names, area, population | Wikidata (Q1070580) · 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
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