The Lowcountry oyster is not the tidy single you get on a coastal raw bar up north. It grows in clusters in the pluff mud, small and briny, and it is meant to be pulled apart in a pile rather than served on a plate of ice.
That shapes how it is eaten here. The classic is the roast: a shovel of clusters steamed over a fire, dumped onto a newspaper-covered table, and shucked standing up with a glove and a knife while everyone works the pile together. It is as much a gathering as a meal, and through the cooler months it happens in backyards and at oyster houses all over the region.
The season runs roughly from fall into early spring, the old rule of thumb being the months with an R. That is when the water cools and the oysters are at their best. Raw bars along the water serve them year-round, but a proper roast belongs to the colder end of the calendar.
If you are new to it, start at a waterfront oyster house where someone will show you the knife, then graduate to a backyard roast if you can get invited to one. The clusters take practice. The payoff is a plate of oysters that tastes like the creek they came out of that morning.