Folly Beach's version starts at noon by the pier. Following the plunge you can warm up at the oyster roast at the Tides hotel.
Meanwhile, Dunleavy's Pub will be hosting their Polar Plunge in Sullivan's Island. Their event starts at 11 am, but the actual plunge happens at 1 pm. Proceeds will benefit the South Carolina Special Olympics. Regardless if you attend, donations are accepted HERE.
If you are going, have fun...and don't freeze to death please.