There are a lot of beaches surrounding Antiparos town, some small, some larger, and with the exception of one they don't have chairs and umbrella's. My favourites are the naturistbeach and the campingbeach which overlook the small island of Diplo. You have to walk for five minutes to reach them. There's also a beach in front of our apartment, but the sand is a bit too hard to our taste. It doesn't really matter which way you walk, because you will within a short time bump into a beach. One of the great plusses is that in case there is a hard wind blowing you will always find a beach where you are not blown away, since they are all positioned in different places around the town.
It's worth renting a bike or a car and going to the south side of the island, where you will find some of the best beaches, and a small settlement, Agios Georgios, with some taverna's and some more rooms to let (the best: Dolphins Apartments, which is on my website). A good thing, especially in high season when it tends to get very busy. Soros (also for nudists) and Apandima Beach (with a cozy taverna) are very pretty and recommendable. Agios Georgios also has a couple of nice beaches and plenty of private coves (for the naturists if you like that) and here you have a view over several other islands. One of the other attractions on the island, a big cave, is also in the south. A couple of centuries ago it was one of the most famous in the world.
For the people that like to go to naturist beaches I have made a special page.