Because of the unique geographical feature of the island, the beaches in Santorini are quite different to the other beaches in Greece. They have red and black volcanic pebbles on them as well as steep cliffs leading up to the mainland which have villages perched on the top of them.
Red Beach is probably the most well known and it has black and red volcanic pebbles and nice hot water for those who want to bathe. It is extremely beautiful which is why it is so popular. It is quite a small beach and can therefore get quite crowded. The car park has a rocky walk down to the beach and the sand is reddish black and painful to sit on so there are sun loungers on it. Just before the water is a layer of pebbles and there are interesting rocks in the sea, so many people snorkel and observe them that way. The beach can only be reached by car and the walk down from the car park.
Kamari is a long black sandy beach and has an interesting feature of a rock called Mesa Vouna rising out of the sea. This right gets lit up by the sun at night, making it an interesting place to be. There are many facilities on the beach such as loungers and umbrellas as well as water sports on offer.
Perissa is very crowded with tourists as it has a very long beach. The black sand is popular in the evenings when the Mesa Vouno rock lights up. The area around the beach is newly built and so has a good variety of places to stay, eat, drink and be entertained. It has much more modern buildings than many of the other villages, although it does have a 16th century chapel.
Agios Georgios is another black beach which is popular with tourists. It has seats and umbrellas to rent and there are many restaurants and tavernas along the beach. There are also water sports on offer such as windsurfing, jet-skiing and banana boating.
For something quieter Cape Columbo is recommended as it is one of the most isolated beaches. It has a strip of dark sand and is approached from several different paths. Monolithos is also a quieter beach but it can be very windy. It does have some sun loungers and activities such as a play area for children, basketball court and football pitch and there are trees along the back so there is always some shade.