The best beaches are on the south coast- the north is less crowded but very windswept. In high season, sunloungers and parasols cram every inch of Ormos (nearest to Chora, but tiny), Platis Gialos (larger, but equally busy) and those two nudist beaches nicknamed "Paradise" and "Super Paradise".
On the plus side there are heaps of beach restaurants and bars, and for watersports fans everything from para- scending to banana boats. Further east Agia Anna and Kalafati beaches are less crowded.
SUPER PARADISE MYKONOS
Super Paradise is not the greatest swathe of soft yellow sand on Mykonos; but it is the best party beach in the Cyclades. On a small, deep bay full of magnificently blue Aegean water, protected from the wind, Super Paradise is on the southern coast next to the relatively unassuming Paradise Beach. It used to be a mainly gay beach; now it's mixed, with nudity acceptable. The beach gets packed, but with the right crowd for a party.
The most famous of the many well-known beaches of the island, this was the first nude beach of the island, and is situated on the beautiful south coast of Mykonos, easily accessible by bus and by caique. A beautiful sandy crescent, with a few shady trees, it is usually quite crowded and noisy, with beach bars blasting a variety of modern pop and techno music day and night. It’s become quite a nightspot, as the revelry continues well into dawn, attracting quite a crowd after the bars close in Mykonos Town. It’s a great place for the young crowd to connect, and the sea is clean and protected from the wind. Avoid dressing up in clothes that will shrink in water: it is common practice here to push one another into the pools to cool down the dancing fever!