Hydra Weather

The weather in Hydra follows that of the Mediterranean climate. Sharing some similarities to the weather of other Saronic islands, summer in Hydra is quite hot to very hot. At the same time, winters are a bit cold, mostly mild but with a strong chance of rainfall and increased humidity in seaside areas like Hydra Town.

In brief, the weather in Hydra is sunny during the summer months. The hottest months are July and August, while the coldest are January and February.
Visitors who would prefer to avoid the thousands of tourists arriving in summer should consider traveling to Hydra in late spring or early autumn, as the weather will still allow them to engage in most of the activities they want to, albeit one should also be well prepared for rainfalls, too.

The Mediterranean climate allows most off-season guests of Hydra to do a plethora of things during their stay, given that the number of tourists from abroad is lower, though lots of people from Attica and Peloponnese still visit the island.
Most businesses shut down around the end of October and open around mid-April.

Below, you can see the average temperatures in Hydra by month. We have also gathered information regarding the weather by month.

Average High & Low Air Temperature (in °C/°F)

 

Discover the weather in Hydra by month:
January | February | March | April | May | June | July | August | September | October | November | December

January is one of the coldest months of the year in Hydra. The island has high humidity and frequent rainfalls, while many establishments are closed due to the winter season.

The average temperature is 9.3°C/48.74°F (maximum 13.4°C/56.16°F | minimum 4.6°C/40.36°F)
On the coldest nights, the temperature may drop to -3.8°C/25°F.
On the warmest days, the temperature may reach 22.2°C/72°F.
The sunshine lasts approximately 4.15 hours.
Humidity reaches 72%, while the mean speed of the wind is around 14 kph.
The mean sea temperature is about 15.8°C/60.5°F; hence, swimming is not recommended.

The weather in February closely mimics January's forecasts.

The average temperature is 9.9°C/49.82°F (maximum: 14.2°C/57.5°F | minimum 4.9°C/40.96°F).
On the coldest nights, the temperature may drop to -2.7°C/27°F.
On the warmest days, the temperature may reach 21.1°C/70°F.
The sunshine lasts approximately 4.8 hours.
Humidity reaches 70%, while the mean speed of the wind is around 15 kph.
The mean sea temperature is about 15.1°C/59.2°F; hence, swimming is not recommended.

March signals the start of spring, and it is believed to be a cold month, though the sun is a bit warmer. Direct sunlight with no clouds on the horizon raises the temperature of Hydra, only for it to get colder after sunset time.

The average temperature is 11.25°C/52.26°F (maximum 15.6°C/60.14°F | minimum 6.3°C/43.5°F).
On the coldest nights, the temperature may drop to -2.2°C/28°F.
On the warmest days, the temperature may reach 22.77°C/73°F.
The sunshine lasts approximately 5.9 hours.
Humidity reaches 66%, while the mean speed of the wind is around 15 kph.
The mean sea temperature is about 15.2°C/59.4°F; hence, swimming is not recommended.

April is a smooth transition to warm weather, though the sea remains cold, and there are a handful of rainfalls still on the horizon.

The average temperature is 14.58°C/58.26°F (maximum 19.5°C/67°F | minimum 9.1°C/48.4°F).
On the coldest nights, the temperature may drop to 0°C/32°F.
On the warmest days, the temperature may reach 27.77°C/82°F.
The sunshine lasts approximately 7.65 hours.
Humidity reaches 60%, while the mean speed of the wind is around 13 kph.
The mean sea temperature is about 16.2°C/61.2°F; hence, swimming is not recommended.

May, the last month of springtime, begins the of warm weather season. It is an ideal month to visit Hydra, given that the temperature is good enough, but mass tourist arrivals are yet to take place. Plus, the prices of accommodation are much better!

The average temperature is 19.62°C/67.32°F (maximum: 24.9°C/76.86°F | minimum: 13.6°C/56.48°F).
On the coldest nights, the temperature may drop to 7.2°C/45°F.
On the warmest days, the temperature may reach 35°C/95°F.
The sunshine lasts approximately 9.4 hours.
Humidity reaches 56%, while the mean speed of the wind is around 12 kph.
The mean sea temperature is about 19.2°C/66.5°F; hence, the waters are cool.

Hydra in June is quite fine, given that there are rare occasions of a rainy day, and it is the start of the tourist season. The beach waters are getting much warmer around the island, and the prices in apartment rentals are at medium-high cost. Plus, it is not as busy as the following two months of summertime.

The average temperature is 24.58°C/76.25°F (maximum 29.6°C/85.28°F | minimum 18.7°C/65.65°F).
On the coldest nights, the temperature may drop to 11.1°C/52°F.
On the warmest days, the temperature may reach 37.77°C/100°F.
The sunshine lasts approximately 11.2 hours.
Humidity reaches 50%, while the mean speed of the wind is around 13 kph.
The mean sea temperature is 23.1°C/73.6°F; hence, the waters are warm.

July is one of the hottest months, and since this signals the start of the high season, prices are at an all-year high, and bookings are full, thus it is recommended that you book your ferry tickets and stay of choice at least 2-3 months beforehand. The sea is also very warm and ideal for exploring.

The average temperature is 27.9°C/82.23°F (maximum 32.6°C/90.66°F | minimum 22.2°C/71.97°F).
On the coldest nights, the temperature may drop to 15°C/59°F.
On the warmest days, the temperature may reach 40°C/104°F.
The sunshine lasts approximately 11.75 hours.
Humidity reaches 43%, while the mean speed of the wind is around 17 kph.
The mean sea temperature is 25.5°C/77.9°F; hence, the waters are very warm.

August, paired with July, is also one of the hottest months in Hydra since the weather is always warm and rainfalls are quite rare. This is the peak of the summer season, with lots of tourists and rises in price tags.

The average temperature is 27.83°C/82.1°F (maximum 32.4°C/90.32°F | minimum 22.7°C/72.93°F).
On the coldest nights, the temperature may drop to 16.1°C/61°F.
On the warmest days, the temperature may reach 41.1°C/106°F.
The sunshine lasts approximately 10.95 hours.
Humidity reaches 46%, while the mean speed of the wind is around 17 kph.
The mean sea temperature is 26.1°C/79°F; hence, the waters are very warm.

September acts like the introduction to the autumn season, but it bears many similarities to June! Temperatures are still high, and the sea waters remain really warm, though there are distinctively fewer heatwaves than in August and July. Part of the mid-high season, visiting the island in September is widely recommended.

The average temperature is 23.85°C/74.94°F (maximum 28.4°C/83.14°F | minimum 19°C/66.24°F).
On the coldest nights, the temperature may drop to 8.88°C/48°F.
On the warmest days, the temperature may reach 37.77°C/100°F.
The sunshine lasts approximately 9.25 hours.
Humidity reaches 57%, while the mean speed of the wind is around 16 kph.
The mean sea temperature is 25.2°C/77.4°F; hence, the waters are very warm.

Throughout October, the temperature drops slightly, but the sea waters remain ideal for a swim. Plus, a lot of the shops are still open, mostly throughout the first half of the month.

The average temperature is 19.3°C/66.74°F (maximum 24.05°C/75.3°F | minimum 14.54°C/58.18°F).
On the coldest nights, the temperature may drop to 6.1°C/43°F.
On the warmest days, the temperature may reach 32.8°C/91°F.
The sunshine lasts approximately 6.7 hours.
Humidity reaches 66%, while the mean speed of the wind is around 13 kph.
The mean sea temperature is 23.1°C/73.6°F; hence, the waters are warm.

The rainy November is when the off-season starts, given that the island's temperature is much lower, the sea waters coolen up, and most tourist shops are closed.

The average temperature is 15.8°C/60.4°F (maximum 19.9°C/67.86°F | minimum 11.2°C/52.16°F).
On the coldest nights, the temperature may drop to 2.2°C/36°F.
On the warmest days, the temperature may reach 27.2°C/81°F.
The sunshine lasts approximately 4.9 hours.
Humidity reaches 73%, while the mean speed of the wind is around 13.5 kph.
The mean sea temperature is 20.6°C/69.1°F; hence, the waters are a little bit cool.

December is a very cold month for the island. Temperatures are much lower, rain pours down on the regular, and humidity is at its peak.

The average temperature is 12.2°C/54.04°F (maximum 16.1°C/60.9°F | minimum 8°C/46.46°F).
On the coldest nights, the temperature may drop to -2.22°C/28°F.
On the warmest days, the temperature may reach 22.2°C/72°F.
The sunshine lasts approximately 4.25 hours.
Humidity reaches 73%, while the mean speed of the wind is around 12.5 kph.
The mean sea temperature is about 17.9°C/64.2°F; hence, swimming is not recommended.