Island Day Cruises - An armada of boats of all sizes leave their harbor berths each day at approximately 10:00AM and return at approximately 6:00PM. While you can charter the entire boat in advance, most are run on a first come first serve communal basis. Lunch is usually provided, and depending on the size of the boat prices can range from $10 to $30 for an entire day. Destinations during the cruise include local lagoons, beaches, sea caves and other features where you are given time to swim or explore the local islands.