The best all-around tour of Charleston Harbor is the 90-minute ride offered by Spiritline Cruises (800/789-3678, www.spiritlinecruises.com [1], $16 adults, $10 ages 6–11), which leaves from either Aquarium Wharf or Patriots Point [2]. Allow about a half-hour for ticketing and boarding. They also have a three-hour dinner cruise in the evening leaving from Patriots Point (about $50 per person) and a cruise to Fort Sumter [3].
Sandlapper Water Tours (843/849-8687, www.sandlappertours.com [4], $20–27) offers many types of evening and dolphin cruises on a 45-foot catamaran. They also offer Charleston’s only water-borne ghost tour.
Links:
[1] http://www.spiritlinecruises.com
[2] http://www.moon.com/destinations/charleston-savannah/charleston/sights/east-cooper/patriots-point
[3] http://www.moon.com/destinations/charleston-savannah/charleston/sights/waterfront/fort-sumter
[4] http://www.sandlappertours.com