If you are wanting to get out on the water: Folly beach is a beautiful place to lay out in the sand, grab a bite to eat, and enjoy the weather!
Charleston City Market is a wonderful area to walk around, see all of the different pieces of art, handcrafted soaps, woodwork and everything in between! I highly recommend visiting if you are given the time.
Nice stroll to all the shops and restaurants.
Scenic walk by the water.