Municipality of Hydra
The municipality has 5 official bathing-water sites, and all were classified Excellent in the 2024 season (EEA). In the municipal seat the weather is most comfortable for walking and sightseeing in May and June, and the sea reaches 22 °C from May to September.
- Settlements
- 8OpenStreetMap, 24 Sept 2026
- Settlement altitudes
- Not recordedOpenStreetMap, 24 Sept 2026
- Wildfires 2016–2026
- 7 firesabout 114 hectares burnt (EFFIS)
- Natura 2000
- 0 sitesoverlap the municipality (YPEN)
- Zone prices 2021, per m²
- 1,350–4,150 €16 zones, a tax value and not a market price
When to go
This section is about Hydra, the seat of the municipality, not the whole municipality.
- Jan13°15°
- Feb13°15°
- Mar14°16°
- Apr16°19°
- May20°23°comfortable weather, warm sea
- Jun24°25°comfortable weather, warm sea
- Jul27°26°warm sea
- Aug27°25°warm sea
- Sep25°23°warm sea
- Oct21°20°
- Nov18°18°
- Dec14°16°
- Top figure: air, bottom: sea
- Comfortable weather for walking
- Sea 22 °C or warmer
The weather is most comfortable for walking and sightseeing in May and June (average temperature around 21.7 °C, little rain).
The sea is 22 °C or warmer from May to September (up to 25.8 °C).
Monthly rain reaches 80 mm or more from November to January.
Day length is 9 h 35 min at the winter solstice (07:36 to 17:11) and 14 h 44 min at the summer solstice (06:05 to 20:49), Greek time.
- Mean temperature °C
- Rain (mm, right axis)
- Sea °C
- Sea 22 °C or warmer
| Month | Mean temp. °C | Rain mm | Sea °C | Daylight h |
|---|---|---|---|---|
| Jan | 12.6 | 86 | 14.9 | 9.8 |
| Feb | 12.6 | 71 | 15.1 | 10.8 |
| Mar | 13.9 | 58 | 16.1 | 11.9 |
| Apr | 15.8 | 32 | 18.9 | 13.1 |
| May (sea 22 °C or warmer) | 19.5 | 24 | 22.5 | 14.2 |
| Jun (sea 22 °C or warmer) | 23.8 | 20 | 25.0 | 14.7 |
| Jul (sea 22 °C or warmer) | 26.6 | 11 | 25.8 | 14.5 |
| Aug (sea 22 °C or warmer) | 27.0 | 8 | 24.8 | 13.7 |
| Sep (sea 22 °C or warmer) | 24.6 | 30 | 22.8 | 12.5 |
| Oct | 21.1 | 54 | 20.3 | 11.3 |
| Nov | 17.8 | 82 | 17.5 | 10.2 |
| Dec | 14.4 | 101 | 15.5 | 9.6 |
Temperature and rain: NASA POWER (MERRA-2), period 2001–2020, model cell about 30 km away. The temperatures are monthly averages from a regional model. Sea: NOAA OISST v2.1, period 1991–2020, nearest cell about 10 km away (0.25 degree grid). Daylight: calculated for the 15th of each month. These are regional model values and typical conditions, not a forecast.
Cities, towns and villages
Settlements of the municipality in OpenStreetMap. Those with a link have their own page; the rest open on the map. Altitude is shown only where OpenStreetMap records one.
Official bathing-water beaches
Latest classification of the waters by the European Environment Agency (queried 6 Oct 2026).
| Beach | Latest class | Season |
|---|---|---|
| Avlaki | Excellent | 2024 |
| Mandraki | Excellent | 2024 |
| Mikro Kamini – Kaminia | Excellent | 2024 |
| Spilia | Excellent | 2024 |
| Vlychos | Excellent | 2024 |
How the numbers were counted
Fires: the count covers EFFIS burnt areas (roughly 30 hectares and above) whose reference point, the mean of the outline's vertices, lies inside the municipality. Our data holds dates from 23 Mar 2016 to 12 Sept 2026. Smaller fires do not appear.
Natura 2000: a site counts as overlapping when a sampled point lies in both polygons or at least three vertices of one lie inside the other.
Zone prices: the 2021 objective-system zones whose reference point lies in the municipality. They are tax values, not market prices.
Neighbouring municipalities
The five municipalities with the nearest centre, in a straight line.
- Municipality of Poros13.5 km
- Municipality of Ermionida24.3 km
- Municipality of Troizinia - Methana30.6 km
- Municipality of Spetses30.7 km
- Municipality of Angistri41.3 km
Identifiers
| Source | Link |
|---|---|
| OpenStreetMap | boundary relation |
| Wikidata | Q16642582 |
Sources
Every figure on this page comes from the sources below, with the date each was updated.
- Designated bathing waters (locations)Ministry for Environment and Energy, YPEN geoportal · Current bathing season register · Date:
- Bathing water quality classificationEuropean Environment Agency, WISE Bathing Water Directive database · Latest assessed season in the EEA database; every season from 2011 is kept as a per-beach history · Date:
- Monthly climate normalsNASA POWER, MERRA-2 meteorological model · 2001–2020 climatology period returned by NASA POWER · Date:
- Sea temperature (NOAA OISST)NOAA National Centers for Environmental Information / Physical Sciences Laboratory · OISST v2.1 monthly long-term mean climatology, 1991-2020 period · Date:
- Burnt areasEFFIS, European Forest Fire Information System (Copernicus EMS) · Rolling archive of mapped burnt areas · Date:
- Natura 2000 protected sitesMinistry for Environment and Energy, YPEN geoportal · Current national Natura 2000 network · Date:
- Natura 2000 site namesEuropean Environment Agency (EEA) / European Commission Directorate-General for Environment (DG ENV) · EEA Natura 2000 register, snapshot taken 25 September 2026 (446 Greek sites) · Date:
- Objective property value zonesMinistry of National Economy and Finance, via data.gov.gr · 2021 revision of the objective value system · Date:
- Everyday places, tourism, transport and natureOpenStreetMap contributors, via the Overpass API · Live database at the time of the query · Date:
- Municipal boundaries, settlements and settlement altitudesOpenStreetMap (Geofabrik Greece extract, 24 Sep 2026), ODbL · Date:
Page updated .