Ýdra, Greece

Attica · Greece

Ýdra is a small town in Attica, Greece with a population of 1,988. Elevation: 3 ft (1 m). Average temperature: 62°F (17°C).

Population source: Wikidata (dated census and official estimates), GeoNames. Climate: WorldClim 2.1 normals (1970-2000), NASA POWER. Updated August 2026

1,988 Population 127/sq mi density
3 ft Elevation 1 meters
62°F Avg Temperature 17°C
19.6 in Annual Rain
Europe / Athens Timezone

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Explore over 40 sections covering people, economy, housing, health, crime, climate, community, costs, trends, schools, colleges, hospitals, treatment centers, industries, museums, libraries, breweries, farmers markets, grocery stores, pharmacies, campgrounds, parks, trails, stadiums, ski resorts, daycare centers, nursing homes, churches, fire stations, cell towers, bridges, power plants, EV stations, prisons, radio stations, airports, police stations, post offices, Amtrak stations, superfund sites, UNESCO sites, and more.
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About Ýdra

Ýdra

Hydra est une ville de Grèce sur l'île d'Hydra dans le dème d'Hydra.

People

Population1,988
Density127/mi²

Climate

Avg Temp62°F (17°C)
Rain19.6 in/yr
Elevation3 ft (1 m)
Population1,988
Population Density127 / sq mi
Elevation3 ft (1 m)
Coordinates37.3498°, 23.4656°
TimezoneEurope/Athens
Country🇬🇷 Greece
State / ProvinceAttica
Average Temperature62°F (17°C)
January Average48°F (9°C)
July Average78°F (26°C)
Annual Precipitation19.6 inches (497 mm)
Annual Snowfall0.0 inches (0 cm)

About Ýdra

Ýdra is a small town in Greece (Attica) with a population of 1,988. 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.

Ýdra enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 48°F in January while summers reach 78°F in July. Annual precipitation totals 19.6 inches (drier than the 38-inch national average). The city sits at an elevation of 3 feet, near sea level.

Temperature

48°F Jan (9°C) 78°F Jul (26°C)
Annual Average61.9°F
15% above Greece avg
January Average48°F (9°C)
July Average78°F (26°C)

Geography

Elevation3 ft (1 m)
Area15.7 sq mi (40.6 km²)
Population Density127/sq mi
Coordinates37.3498°N, 23.4656°E
TimezoneEurope/Athens

Precipitation & Snow

Annual Rainfall 19.6"
49% below Greece avg
Snowfall 0.0"
Wettest Month (Dec) 3.35"
Driest Month (Jul) 0.28"

Air Quality

Earthquake History

2,792 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.7. Most recent: M4.1 on Aug 15, 2025.

Jan 8, 2006 26 km NE of Kýthira, Greece M6.7 118 km
Jan 6, 2008 15 km WNW of Leonídio, Greece M6.2 70 km
Sep 7, 1999 5 km WNW of Fylí, Greece M6.0 86 km
May 21, 2002 18 km SW of Adámas, Greece M5.9 108 km
Nov 18, 1992 10 km SE of Galaxídhion, Greece M5.9 139 km
Aug 29, 2014 59 km E of Géfyra, Greece M5.8 77 km
Mar 1, 2004 6 km ESE of Arfará, Greece M5.6 122 km
Apr 4, 2014 36 km ESE of Ýdra, Greece M5.6 37 km
Sep 16, 2001 6 km SE of Kopanáki, Greece M5.5 141 km
Jun 15, 1995 3 km E of Galaxídhion, Greece M5.4 147 km
Jul 19, 2019 1 km NNE of Magoúla, Greece M5.3 83 km
Jun 9, 2015 13 km E of Malesína, Greece M5.3 141 km
Mar 30, 2019 2 km SE of Galaxídhion, Greece M5.3 147 km
Mar 20, 1992 9 km SE of Adámas, Greece M5.2 121 km
Oct 9, 2010 14 km NE of Xylókastro, Greece M5.1 111 km
Jun 18, 2008 4 km NNW of Ayía Triás, Greece M5.1 70 km
Sep 22, 2012 8 km NNE of Káto Dhiminió, Greece M5.0 104 km
May 16, 2018 21 km SSW of Géfyra, Greece M5.0 105 km
Jan 9, 1992 32 km NW of Kýthira, Greece M5.0 125 km
Feb 4, 1993 15 km S of Antikyra, Greece M5.0 122 km
Source: USGS (M2.5+, 1990-2025)

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
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

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
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

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").

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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

NameTypeAddressPhoneAnnual Revenue
Archaeological Museum of Poros
Ekklisiastikó Mouseío Ýdras
Museum of Hydra
Pavlos Kountouriotis Mansion
Οικία Λάζαρου Κουντουριώτη

Libraries in Ýdra

NameAddressStaffAnnual VisitsCirculationCollectionPrograms
Poros Public Library0.0

Hotels in Ýdra

13 hotels within city radius - OpenStreetMap data

Amaryllis Hitel
Amaryllis Hotel
Botsis Guest House
Bratsera Hotel
Cactos
Delfini
Hotel Mistral
Kirki Hotel
Mandraki Beach Resort
Orloff Boutique Hotel
Phaedra Hotel
Sofia
Υδρούσα (Ξενία)

Cafes in Ýdra

15 cafes within city radius - OpenStreetMap data

Antigone's
Argis
Bandera Coffee & Food
Break Time
Cafe Hydra
Ciao Cafe
Da vinci
Hydra's Corner
Hydra's corner
Hydronetta
Isalos
Skipper
Tassos Cafe
Καφέ της Γωγώς
λαβεĩν

Cinemas in Ýdra

1 cinemas within city radius - OpenStreetMap data

Hydra Cinema Club

Monuments in Ýdra

1 monuments within city radius - OpenStreetMap data

Mandraki Beach

Castles in Ýdra

4 castles within city radius - OpenStreetMap data

Forts of Mandraki in Hydra
Froúrio Mandráki Ýdras
Monastery of Agios Athanasios
Οχυρά Μανδρακίου Ύδρας

Dentists in Ýdra

1 dentists within city radius - OpenStreetMap data

GR #5079311164

Banks in Ýdra

4 banks within city radius - OpenStreetMap data

Alpha
Alpha Bank
National Bank of Greece
Πειραιώς

Stadiums & Teams in Ýdra

TeamLeagueDivision

Airports Near Ýdra

5 airports within the area.

AirportIATAType
Athens Eleftherios Venizelos International AirportATHLarge 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 OfficeAddress
Hellenic Post
γενικη ταχυδρομική

Churches & Religious Organizations in Ýdra

24 religious organizations (IRS tax-exempt data).

NameAddress
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
Μονή Αγίας Ευπραξίας
Μονή Αγίας Τριάδος
Μονή Προφήτη Ηλία
Παναγιά

Quick Facts

Timezone
Europe/Athens
Website
ydra.gov.gr

🇬🇷 About Greece

Capital Athens
Population 10,727,668
Area 131,940 km²
GDP (USD) $242,946,187,738
GDP per capita $23,344
HDI 0.893
Life expectancy 81.5 years
Internet users 85.0%
Urban population 78.8%
Currency EUR (Euro)
Languages Greek
Calling code +30
TLD .gr
Driving side right

Public Holidays in Greece

15 public holidays this year

Date Holiday Local Name
Jan 1 New Year's Day Πρωτοχρονιά
Jan 6 Epiphany Θεοφάνεια
Feb 23 Clean Monday Καθαρά Δευτέρα
Mar 25 Annunciation Ευαγγελισμός της Θεοτόκου
Mar 25 Independence Day Εικοστή Πέμπτη Μαρτίου
Apr 10 Good Friday Μεγάλη Παρασκευή
Apr 12 Easter Sunday Κυριακή του Πάσχα
Apr 13 Easter Monday Δευτέρα του Πάσχα
May 1 Labour Day Εργατική Πρωτομαγιά
May 31 Pentecost Πεντηκοστή
Jun 1 Whit Monday Δευτέρα Πεντηκοστής
Aug 15 Assumption Day Κοίμηση της Θεοτόκου
Oct 28 Ochi Day Το Όχι
Dec 25 Christmas Day Χριστούγεννα
Dec 26 St. Stephen's Day Σύναξις Υπεραγίας Θεοτόκου Μαρίας

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Frequently Asked Questions About Ýdra

What is the population of Ýdra?

Ýdra has a population of 1,988 residents and is located in Greece. The population density is 127 people per square mile, spread across 15.7 square miles.

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. Annual rainfall totals 19.6 inches.

Nearby Cities

Galatás, ESYE31 2,145 pop · 10.2 mi Póros, ESYE31 2,806 pop · 10.4 mi Ermióni, ESYE25 2,506 pop · 12.3 mi Kranídi, ESYE25 4,053 pop · 16.9 mi Pórto Chéli, ESYE25 2,272 pop · 17.7 mi Spétses, ESYE31 3,748 pop · 17.9 mi Dídyma, ESYE25 1,047 pop · 17.9 mi Koilás, ESYE25 1,004 pop · 19.2 mi Megalochóri, ESYE31 6,633 pop · 25.8 mi Palaiá Epídavros, ESYE25 1,540 pop · 26.2 mi Aegina, ESYE31 6,633 pop · 27.5 mi Kypséli, ESYE31 6,633 pop · 28.4 mi Vathý, ESYE31 6,633 pop · 28.6 mi Ligourión, ESYE25 2,197 pop · 29.7 mi
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