weather and climate on Hydra

Five-Day Forecast for Temperatures, Sun, Rain, Wind Speed & Beaufort is trusted by sailors to give an accurate forecast for sun, temperatures, rain, wind speed, Beaufort levels, wind direction on Hydra Island Greece. The Beaufort readings are particularly helpful if you are trying to determine if elevated winds threaten to stop boats (flying dolphins and cats will often stop running if the Beaufort reaches 6).

Average Temperatures on Hydra

January: 6°C (43°F) to 12°C (54°F)
February: 6°C (43°F) to 13°C (55°F)
March: 7°C (45°F) to 15°C (59°F)
April: 10°C (50°F ) to 19°C (66°F)
May: 14°C (57°F) to 24°C (75°F)
June: 18°C (64°F) to 28°C (82°F)
July: 20°C (68°F) to 31°C (88°F)
August: 20°C (68°F) to 30°C (81°F)
September: 17°C (63°F) to 27°C (72°F)
October: 14°C (57°F) to 22°C (72°F)
November: 10°C (50°F ) to 18°C (64°F)
December: 7°C (45°F) to 14°C (57°F)

Average Sea Temperatures on Hydra

January: 16°C/61°F
February: 15°C/59°F
March: 15°C/59°F
April: 16°C/61°F
May: 18°C/64°F
June: 21°C/70°F
July: 24°C/75°F
August: 24°C/75°F
September: 24°C/75°F
October: 21°C/70°F
November: 19°C/66°F
December: 17°C/63°F

Climate & Seasons on Hydra

Hydra has a Mediterranean climate and a full cycle of seasons, with hot, dry summers, chilly, wet, windy winters, and a temperate spring and fall.

Spring (end of March/early April and May)
Temperatures range between 15 and 25 degrees Celsius. This period can still see a lot of rain. Everything is green and the wild flowers festoon the hills and paths with bright reds, yellow, and purples. Sea temperatures start to rise and some die-hards start their swimming season. The weather is mild and becomes progressively warmer, sunnier, and drier as the weeks progress toward summer. The Meltemi, a wind from the northwest, tends to blow in mid-May, cooling the air.

Summer (June through August)
The weather on Hydra gets hotter as the summer progresses. Temperatures tend to hover in the low to mid 30s can reach into the 40s for stretches. Hot winds blowing up from Africa, especially in August, can offer a bit of relief. Sea temperatures range between 20 and 25 degrees across the summer. Hydra summers are hot and sunny. The maximum temperatures typically hovers around 30 °C (86°F), with occasional heatwaves with highs around 36/38 °C (97/100 °F).

Fall (September into November)
This is, for many, the best time of year on Hydra. Temperatures are still warm, though evenings can get chilly. The sea is still warm enough for swimming, and the weather is perfect for hiking and exploring the island. The weather is is warm and often sunny, gradually becoming cooler with more frequent rain.

Winter (November into March)
The winter months are generally quite chilly, rainy, and windy, dotted with the occasional sunny, warm day. Temperatures tend to hover between 10 and 15 degrees. Cold air masses from the north can bring cold snaps, with highs below 10°C (50°F); moreover, windchill can increase the feeling of cold.

Hydra Weather by Month

January: expect colder temperatures, rain, and occasional thunderstorms; snow is uncommon. Daytime temperatures range between 10℃ and 16℃. The first week of the month is usually the most temperate of January on Hydra.

February: expect colder temperatures, rain, occasional thunderstorms, and some fog; snow is rare. Daytime temperatures range between 11℃ and 17℃. Hydra’s temperatures become more moderate starting in the third week of February.

March: expect occasional rain and the odd thunderstorm; snow is rare and fog is sparse. Temperatures are still quite cool. Daytime temperatures range between 13℃ and 20℃.

April: expect occasional rain and fog; thunderstorms are rare. Weather is typically warm and pleasant. Daytime temperatures range betwen 17℃ and 24℃. The UV index climbs to 7 in April, so protective measures, such as sunscreen, hats, and sunglasses, are warranted.

May: expect intermittent rain, and the very occasional thunderstorm, especially early in the month. May on Hydra is often pleasant and warm. Daytime temperatures range between 23℃ and 28℃. The UV Index is 8, so protective measures, such as sunscreen, hats, and sunglasses, are warranted..

June:  expect hot and sunny weather, with little rain. Heatwaves are common with temperatures above 33℃. The UV Index is 9.

July: expect clear skies and hot sun, with average temperatures above 35℃. The UV Index reaches 10.

August: expect clear skies and hot sun, with average temperatures above 35℃. The UV Index is 9.

September: expect generally clear skies and plenty of sun, with average temperatures above 30℃. The UV Index is 7.

October: expect occasional rain and the odd thunderstorm and otherwise pleasant and warm weather. Daytime temperatures range from 20℃ to 27℃.

November: expect rain, the occasional thunderstorm, and cooler temperatures. Daytime temperatures range between 16℃ and 23℃.

December: expect frequent rain and thunderstorms and cooler temperatures; snow is rare. Daytime temperatures range between 11℃ and 20℃.

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