Private Capri boat tours depart from Marina Grande (the same port where ferries from the mainland dock) and cruise around the entire island, stopping at the Faraglioni Blue Grotto. There are also tours deparing from Marina Piccola that follow the same route. The minimum time you need to cruise around the island is about two hours, but you can also opt for a 3- , 4-, or 7-hour tour with more time to stop and swim or to have lunch at a waterfront restaurant.
Most boat tours use traditional wooden "gozzo" boats, which have a sundeck and shower. Larger boats also have a cabin and WC on board. You can also opt for a more powerful speedboat or small yacht. Prices always include skipper and fuel.