This aspect of Charleston [1]’s tourist scene is very well represented. The best operators include:
Barrier Island Eco Tours (50 41st Ave., 843/886-5000, www.nature-tours.com [2], tours start at $30), operates out of Isle of Palms [3] and takes you up to the Cape Romaine Refuge [4].
Coastal Expeditions (514-B Mill St., 843/884-7684, www.coastalexpeditions.com [5], prices vary), with a base on Shem Creek in Mount Pleasant, offers several different-length sea kayak adventures.
PaddleFish Kayaking (843/330-9777, www.paddlefishkayaking.com [6], tours start at $45), offers several kinds of kayaking tours (no experience necessary) from downtown, Kiawah Island [7], and Seabrook Island [8].
Links:
[1] http://www.moon.com/destinations/charleston-savannah/charleston
[2] http://www.nature-tours.com
[3] http://www.moon.com/destinations/charleston-savannah/charleston/sights/east-cooper/isle-palms
[4] http://www.moon.com/destinations/charleston-savannah/charleston/greater-charleston/north-charleston
[5] http://www.coastalexpeditions.com
[6] http://www.paddlefishkayaking.com
[7] http://www.moon.com/destinations/charleston-savannah/charleston/greater-charleston/west-charleston/kiawah-island
[8] http://www.moon.com/destinations/charleston-savannah/charleston/greater-charleston/west-charleston/seabrook-island