Greece
Satellite: Sentinel-2 cloudless 2017 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
3.6km²
Area
17km
Coastline
113m
Highest point
Cynthus
24
People
24°C
Warmest sea
August
111km
To the mainland
When to go to Delos
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.
Island in Greece with famous Apollo sanctuary
Delos is an island in Greece. It belongs to Cyclades. It covers 3.6 km², with 17 km of coastline. Its highest point, Cynthus, rises to 113 m. About 24 people live on it. The nearest mainland is 111 km away. It is part of a UNESCO World Heritage site.
Getting there
- Mykonos Island National Airport (JMK)nearest airport with scheduled flights · 9 km in a straight lineCar hire at JMK airport (Mykonos)Discover Cars · Affiliate link↗
- FerriesMykonos - Delos
- 111 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 Delos.
- 2beaches
- 1ferry terminalsDelos
- 2named peaksCynthus
- 68ruins and archaeological sitesMaison De Cleopatre, Stoa of the Naxians, Sanctuary of Zeus and Athena and 65 more
- 3waymarked walking routesDelos Brown Route, Delos Green Route, Delos Blue Route
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
Cross-checked with our atlases
Delos in our other atlases
Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Delos, each with its own numbers.
1mountainPeakyas
Highest point
113m
Cynthus
prominence 113 m · according to Peakyas
The shape of the land.
On average the island stands 26 m above the sea. 100 % of it is below 200 m.
- 86 %0–50 m
- 14 %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.
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) | 14 | 14 | 15 | 17 | 20 | 24 | 26 | 27 | 24 | 21 | 18 | 15 |
| Night low (°C) | 12 | 12 | 13 | 15 | 18 | 22 | 24 | 24 | 22 | 19 | 16 | 13 |
| Sea (°C) | 16 | 16 | 16 | 16 | 18 | 22 | 23 | 24 | 23 | 21 | 19 | 17 |
| Rain (mm) | 99 | 78 | 51 | 27 | 20 | 9 | 5 | 4 | 24 | 53 | 73 | 92 |
| Wet days | 13 | 12 | 9 | 6 | 4 | 2 | 1 | 1 | 4 | 8 | 11 | 13 |
| Sun h/day | 3.7 | 4.6 | 6.8 | 8.5 | 10.4 | 12.1 | 12.4 | 11.3 | 9.5 | 7.1 | 5.1 | 3.5 |
| Wind (km/h) | 26 | 25 | 23 | 21 | 17 | 18 | 23 | 25 | 22 | 22 | 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 | +0.6 | +0.4 | +0.2 | +0.3 | +0.8 | +0.7 | −0.6 | +0.1 | +0.9 | +1.9 | +0.8 | +1.3 |
| 2021 | +1.7 | +1.2 | +0.8 | +0.8 | +0.9 | +1.1 | +0.8 | +1.1 | +0.4 | −0.1 | ±0.0 | +0.3 |
| 2022 | +1.2 | +0.6 | +0.3 | +0.4 | +0.4 | −0.5 | −0.9 | +0.2 | +1.1 | −0.6 | −0.5 | +0.9 |
| 2023 | +1.6 | +0.8 | +0.7 | +0.7 | −0.2 | −0.8 | +1.4 | +1.8 | +0.7 | +1.0 | +2.3 | +1.7 |
| 2024 | +1.9 | +0.8 | +1.1 | +1.3 | +0.5 | +0.6 | +0.5 | +1.5 | +1.9 | +1.6 | +0.4 | +1.2 |
| 2025 | +1.1 | +1.1 | +0.6 | +0.1 | +0.1 | −0.7 | +0.7 | +0.5 | +0.4 | +0.7 | +1.5 | +1.5 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
About these numbers
| Names, area, population | Wikidata (Q173148) · 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 |
| Beaches, mountains, lakes and waterfalls | Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0 |
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