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Ýdra, Greece
Attica · Greece
Ýdra is a small town in Attica, Greece with a population of 1,900. Elevation: 3 ft (1 m). Average temperature: 62°F (17°C).
Data updated June 2026
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About Ýdra
Hydra est une ville de Grèce sur l'île d'Hydra dans le dème d'Hydra.
People
Economy
C+Climate
| Population | 1,900 |
| Population Density | 121 / sq mi |
| Elevation | 3 ft (1 m) |
| Coordinates | 37.3498°, 23.4656° |
| Timezone | Europe/Athens |
| Country | 🇬🇷 Greece |
| State / Province | Attica |
| Average Temperature | 62°F (17°C) |
| January Average | 48°F (9°C) |
| July Average | 78°F (26°C) |
| Annual Precipitation | 19.6 inches (497 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
| Median Household Income | $33,804 |
About Ýdra
Ýdra is a small town in Greece (Attica) with a population of 1,900. The city sits at an elevation of 3 feet (1 meters) above sea level. The average annual temperature is 62°F (17°C). Temperatures range from 48°F in January to 78°F in July. Annual precipitation averages 19.6 inches. The timezone is Europe/Athens.
Income: Ýdra vs Greece
Commute Mode
Income
| Median HH Income | $33,804 |
| 55% below Greece avg |
Employment & Poverty
| Establishments (County) | 110 |
Business (County)
Tax & Cost of Living
Commute & Transportation
Walkability
Temperature
| Annual Average | 61.9°F |
| 15% above Greece avg | |
| January Average | 48°F (9°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 300 days/yr |
Geography
| Elevation | 3 ft (1 m) |
| Area | 15.7 sq mi (40.6 km²) |
| Population Density | 121/sq mi |
| Coordinates | 37.3498°N, 23.4656°W |
| Timezone | Europe/Athens |
Precipitation & Snow
Air Quality
Tsunami History
13 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1965 | NORTH CORINTH GULF | Eruption + Earthquake | 3.0 m | 2 | 141 km |
| 1861 | CORINTH GULF | Eruption + Earthquake | 2.1 m | - | 146 km |
| 2008 | SW. CORINTH GULF | Unknown | 2.0 m | - | 146 km |
| 1981 | GULF OF CORINTH | Earthquake | 1.3 m | - | 97 km |
| 1981 | ATHENS-EASTERN GULF OF CORINTH | Earthquake | 1.0 m | 22 | 108 km |
| 1928 | CORINTHOS-PATRAS GULF | Earthquake | 0.6 m | 20 | 83 km |
| 1992 | CORINTH GULF | Earthquake | - | - | 136 km |
| 1926 | ARGOLIKOS GULF | Earthquake | - | - | 96 km |
| 1862 | IONIAN SEA | Earthquake | - | - | 146 km |
| 1853 | CENTRAL GREECE (EVOIKOS GULF) | Earthquake | - | 17 | 100 km |
| 1794 | CORINTH GULF | Eruption + Earthquake | - | - | 147 km |
| 1402 | GULF OF CORINTH | Earthquake | - | - | 126 km |
| -373 | CORINTHOS-PATRAS GULF | Eruption + Earthquake | - | - | 146 km |
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Methana (32 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Methana | Lava dome(s) | 760 m (2,493 ft) | -258 | 32 km |
| Milos | Stratovolcano(es) | 751 m (2,464 ft) | 140 | 113 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 2.7 in | Coldest |
| February | 48°F (9°C) | 2.5 in | |
| March | 51°F (10°C) | 2.3 in | |
| April | 57°F (14°C) | 1.4 in | |
| May | 65°F (19°C) | 0.8 in | |
| June | 74°F (23°C) | 0.3 in | |
| July | 78°F (26°C) | 0.3 in | Warmest, Driest |
| August | 78°F (25°C) | 0.4 in | |
| September | 72°F (22°C) | 0.5 in | |
| October | 64°F (18°C) | 2.1 in | |
| November | 56°F (14°C) | 3.1 in | |
| December | 51°F (10°C) | 3.4 in | Wettest |
Ýdra has a seasonal temperature swing of 30°F / from 48°F in January to 78°F in July. Total annual precipitation is 19.6 inches, with December being the wettest month (3.4") and July the driest (0.3").
Radio Stations near Ýdra
2 stations within ~55 km.
| Station | Genre | Quality | |
|---|---|---|---|
| Αντένα Αίγινα | - | MP3 320 kbps | |
| Loutraki 87.5 | greek music | MP3 128 kbps |
Museums in Ýdra
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Archaeological Museum of Poros | ||||
| Ekklisiastikó Mouseío Ýdras | ||||
| Museum of Hydra | ||||
| Pavlos Kountouriotis Mansion | ||||
| Οικία Λάζαρου Κουντουριώτη |
Libraries in Ýdra
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Poros Public Library | 0.0 |
Hotels in Ýdra
13 hotels within city radius - OpenStreetMap data
Cafes in Ýdra
15 cafes within city radius - OpenStreetMap data
Cinemas in Ýdra
1 cinemas within city radius - OpenStreetMap data
Monuments in Ýdra
1 monuments within city radius - OpenStreetMap data
Castles in Ýdra
4 castles within city radius - OpenStreetMap data
Dentists in Ýdra
1 dentists within city radius - OpenStreetMap data
Banks in Ýdra
4 banks within city radius - OpenStreetMap data
Stadiums & Teams in Ýdra
| Team | League | Division |
|---|---|---|
Airports Near Ýdra
5 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Athens Eleftherios Venizelos International Airport | ATH | Large Airport |
| Elefsis Air Base | - | Medium Airport |
| Dounis Airfield | - | Small Airport |
| Lechaio Airfield | - | Small Airport |
| Megara Air Base | - | Small Airport |
Post Offices in Ýdra
2 post offices.
| Post Office | Address |
|---|---|
| Hellenic Post | |
| γενικη ταχυδρομική |
Churches & Religious Organizations in Ýdra
24 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| Agía Marína | |
| Ágios Geórgios | |
| Agios Georgios Bisti | |
| Ágios Ioánnis Theológos | |
| Agios Mamas | |
| Ágios Nikólaos | |
| Chiesa | |
| Kathedrikós Ierós Naós Koimíseos | |
| Monastery of Agios Nikolaos | |
| Profítis Ilías | |
| Zoodóchos Pigí | |
| Άγιος Γεώργιος | |
| Άγιος Γρηγόριος | |
| Άγιος Ιωάννης | |
| Άγιος Ιωάννης | |
| Άγιος Ιωαννίκιος | |
| Άγιος Κυπριανός | |
| Άγιος Κωνσταντίνος | |
| Άγιος Νικόλαος | |
| Άγιος Νικόλαος |
Quick Facts
🇬🇷 About Greece
Public Holidays in Greece
15 public holidays this year
Frequently Asked Questions About Ýdra
What is the population of Ýdra?
Ýdra has a population of 1,900 residents and is located in Greece. The population density is 121 people per square mile, spread across 15.7 square miles.
Is Ýdra expensive to live in?
The median household income is $33,804, 55% below the national average of $75,149.
What is the weather like in Ýdra?
Ýdra enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winter temperatures average 48°F in January, while summers reach an average of 78°F in July. The area receives 300 sunny days per year, well above the national average of 205. Annual rainfall totals 19.6 inches.
How is the job market in Ýdra?
There are 110 business establishments in the area.