Well, here's the good news. Yes, you can swim and safely sit in the sun until early December. There are some tips of course and best beaches where the waters tend to be warmer late into the year.
People Also Ask
The Greek islands are wonderful from late April to early November. For swimming, sun, and beach activities it's warmest from late May to early October.
GREECE. Greece is home to some of the best swimming waters in all of Europe, and September is a great month to visit, with the weather and sea temperatures as perfect as can be (26.8°C/80.2°F).
Want to Visit Greece in the Fall but Can I Swim? Yes you can. For the most part the waters at Greek beaches begin to get cold after January. That doesn't mean you'll be hitting the beach and doing what you would do in the summer.
The sea temperature is still warm in October and most days are sunny. Most businesses are open, despite the fewer crowds and, sure enough, you can find great deals in this off-season. The best time to visit Mykonos is October when the crowds have diminished, the water remains warm and rates fall.
The weather in Greece in September is hot and sunny skies can be found in all Aegean and Ionian islands, with the temperatures boasting an average high of a balmy 82 degrees Fahrenheit and an average snowfall of zero. Despite the sun shining down relentlessly, showers are never too far away.
Greek islands which are smaller and less touristic have a shorter season, larger islands like Crete, Corfu and Santorini have extended seasons sometimes up to full year. Hotels have different opening/closing dates but the general rule for islands is that they open in April and close at end October.
The best time to visit Greece is outside the busy summer peaks, during spring (April to June) and early fall (September and October). Temperatures are warm but not stifling, and you'll find that destinations are open but still relatively quiet.
Islands with large cities like Rhodes, Lesvos, and Crete are like cities anywhere. They don't close for the winter. Life just changes. People spend more time indoors, but the restaurants and cafes, bars and clubs are still open and on warm sunny days people still sit outside to eat and drink, at least in the day.
Yes, it'll be cooler, windier, and much, much quieter compared to the summer months, but if your perfect holiday involves loads of walking and hiking by day and cozying up to a good book and a glass of wine by night, you might just fall in love with the Greek Islands in winter.
Winter (November - March) is the low season of sunny Greece. While the big islands like Crete, Rhodes and Corfu entertain visitors all year round, the smaller islands wind down for winter. This would be a wonderful time to visit Greece for a laid-back holiday if you don't mind the cold.
The best time to visit the Greek islands, like Santorini, Mykonos, Corfu and Kefalonia (Argostoli), is in October when the weather is still warm and the crowds are few. The Greek islands are an all-year-round vacation destination, with temperatures ranging from 50°F (10°C) to approximately 100°F (38°C).
With average daily high temperatures in the mid-70s Fahrenheit, it's usually still warm enough in early October to sunbathe in comfort and to dine outside at night, with little chance of rain. By mid-October the Ionian and Aegean seas are cooling quickly; if you love to swim, go early in the month.