Generally very warm Ionian sea and central Mediterranean, slightly 'cooler' Aegean sea. The western coast of Greece, including the islands Corfu, Lefkada and Cephalonia is very warm, with sea surface temperatures in 28-30 °C range.
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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 is famous all over the world for its fabulous sandy beaches with crystal water. In brief: The Greek islands with the best beaches are Crete, Mykonos, Naxos, Milos, Paros, Ios, Lefkada, Zakynthos, Rhodes, Karpathos and more.
It's often said that Crete has the best Greek beaches. The island's many stretches of gorgeous white sand are also some of the top destinations in Greece. Where in Greece has the clearest water? If clear water is what you're after, head to Balos Beach in Crete, which has some of the clearest water in Greece.
Greece is a paradise for swimmers, and it's easy to let your guard down when you are in paradise. For the most part, the beaches of Greece are safe. Shark attacks are unheard of, and tides are barely perceptible throughout the country (with few exceptions).
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.
The temperature on Crete will be similar to Corfu, and the hours of sunshine, the main difference being that on Crete there is less rain – on average only three days in May might see a shower.
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.
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.