Travellers to Hydra during the summer find it difficult to imagine extremes of weather when all they experience is the unrelenting heat of August! But Hydra does experience cold, wet winters and between 2000 - 2006, 2011&12 had snow fall (all be it light) each year. The information below is just a guide of the average weather to expect.
The island has a short spring when temperatures range from 15 - 25 degrees Celsius. The weather is changeable still with the risk of sudden showers. Sea temperatures start to rise and many people, especially those from colder climates, enjoy a swim in the sea. Spring is a particularly pretty time for the island with lots of flowers and greenery.
The weather on Hydra during high season is predictably hot, ranging from 25 - 38 degrees Celsius during the day. Humidity is low and rain fall during high season is rare but not unheard of. Sea temperatures increase to approximately 26 degrees by the end of the summer. August often brings windy weather that blows up from northern Africa so it's a warm/hot wind. Temperatures have been known to rise to 44 degrees during July and August.
The following video makes a serious point in a humorous way. All our visitors from Northern climes, not just the Danes, should take note that they will burn in the Greek sun and we seriously urge you to wear a good, high factor sun block and DON'T try to fry yourselves when you are here. Sunburn damages the skin and can cause skin cancer later in life. And looking like a boiled lobster really isn't attractive - plus it hurts!!!!
One of the most popular seasons on Hydra. The weather is still warm and while it's a little changeable, is still dependable enough to eat out in the evenings. Temperatures start to drop but the sea temperatures are high enough still to make bathing less bracing than it is in the spring.
The winter months can be chilly and damp with lots of rain BUT never for endless days at a time. On Hydra we get as many sunny, dry days as we do wet. Visitor numbers drop from the high season to about 200 holiday makers but the town is busier in the mornings because the 'Three Island Cruise Ship' stays for 3 or 4 hours each day. Temperatures rarely drop below freezing. January - March are often punctuated with really sunny, warm days. These days though, aren't to be relied upon but viewed as a bonus. Very rarely there will be a sprinkling of snow on the very tops of the mountains but it doesn't settle. Please see Winter Holidays on Hydra for more information about what's open, where to stay and what there is to do out of season because Hydra certainly DOESN'T CLOSE!