Greece
Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
109km²
Area
114km
Coastline
713m
Highest point
24°C
Warmest sea
August
144km
To the mainland
When to go to Ios
Best for the beach from July to September.
The sea is warmest in August (24 °C) and coolest in February (16 °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.
Greek island
Ios is an island in Greece. It covers 109 km², with 114 km of coastline. Its highest point rises to 713 m. The nearest mainland is 144 km away.
Getting there
- Santorini International Airport (JTR)nearest airport with scheduled flights · 38 km in a straight lineCar hire at JTR airport (Santorini Island)Discover Cars · Affiliate link↗
- FerriesIos - Santorini (Athinios), Paros - Ios, Ios - Naxos, Sikinos - Ios
- 144 km from the mainlanddistance to the nearest continental coast
- From July to Septemberbest 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 Ios.
- 53beachesKalo Avlaki, Foniadiko, Plakotos and 50 more
- 24viewpointsWindmills, Viglia Manganariou and Viglia Kalamou view, Kalamos Monastiry view and 21 more
- 4lighthouses
- 1ferry terminalsFerry terminal of Ios
- 1marinasMarina Ios
- 30named peaksPyrgos, Megalo Vouni, Profiti Ilias and 27 more
- 1castles and fortsPaleokastro of Ios
- 45ruins and archaeological sitesFarm, Settlement and 43 more
- 2dive centresGo Dive
- 22waymarked walking routesIos Manganari Kalamos monastery (Canon Trail), Ios Mylopotas Analipsi Mersina, Ios Chora Skarkos archeological park and 19 more
- 1campsitesFarOut Beach Resort & Camping
- 51hotels, guesthouses and apartments
- 61restaurants, 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 188 m above the sea. 61 % of it is below 200 m.
- 18 %0–50 m
- 43 %50–200 m
- 34 %200–500 m
- 5 %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
- Íos2,024 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 15 | 15 | 16 | 18 | 21 | 25 | 27 | 27 | 25 | 22 | 19 | 16 |
| Night low (°C) | 13 | 13 | 14 | 15 | 18 | 22 | 24 | 24 | 23 | 20 | 17 | 14 |
| Sea (°C) | 16 | 16 | 16 | 17 | 19 | 22 | 23 | 24 | 24 | 22 | 19 | 17 |
| Rain (mm) | 96 | 81 | 44 | 26 | 19 | 5 | 2 | 2 | 18 | 44 | 64 | 87 |
| Wet days | 13 | 11 | 8 | 5 | 3 | 1 | 0 | 0 | 2 | 6 | 9 | 13 |
| Sun h/day | 4.2 | 4.9 | 7.1 | 8.9 | 10.6 | 12.5 | 12.6 | 11.6 | 9.8 | 7.4 | 5.5 | 3.9 |
| Wind (km/h) | 26 | 26 | 24 | 21 | 18 | 19 | 23 | 23 | 21 | 21 | 22 | 25 |
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 | +0.5 | +0.5 | +0.2 | +0.3 | +0.7 | +0.3 | −0.1 | +0.3 | +1.5 | +1.9 | +1.1 | +1.2 |
| 2021 | +1.5 | +1.2 | +0.9 | +0.8 | +0.9 | +0.9 | +0.8 | +0.9 | +0.4 | −0.1 | +0.4 | +0.4 |
| 2022 | +1.1 | +0.7 | +0.4 | +0.2 | +0.5 | −0.2 | −0.9 | ±0.0 | +0.7 | −0.8 | −0.5 | +0.5 |
| 2023 | +1.5 | +0.6 | +0.6 | +0.5 | −0.3 | −0.5 | +1.0 | +1.8 | +1.2 | +1.3 | +2.2 | +1.9 |
| 2024 | +2.0 | +1.0 | +1.1 | +1.2 | +0.4 | +0.7 | +0.7 | +1.4 | +1.6 | +1.1 | +0.8 | +1.3 |
| 2025 | +1.5 | +1.3 | +0.7 | +0.2 | +0.3 | −0.3 | +0.7 | +0.7 | +0.3 | +0.3 | +1.4 | +1.4 |
+1 warmer than usual −1 cooler than usual
Nearby
More islands nearby.
About these numbers
| Names, area, population | Wikidata (Q216993) · 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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