Hilton Head Island, SC tide times

Hilton Head Island sits between Port Royal Sound and Calibogue Sound on the South Carolina Low Country coast, and its tidal regime is more dramatic than the Myrtle Beach shore to the north. Mean spring range at Hilton Head runs around 2.2 metres — the larger range is a consequence of the island's position between two major tidal inlets (Port Royal Sound to the north and Calibogue Sound to the south) that funnel Atlantic tidal energy into the extensive salt marsh network behind the island. The back-barrier marsh system visible from the causeways and bridges into the island depends entirely on this predictable twice-daily inundation.

The spring tidal range of 2.2 metres means the difference between a high-water beach at Coligny Park (where the public beach access is concentrated) and a low-water beach is substantial — an additional 30 to 60 metres of exposed sand on the ocean side, and the tidal creeks behind the island draining to knee-deep or lower at extreme lows. The firm intertidal zone at low water on the ocean beach is wide enough to be practical for jogging and ball games in addition to shell collecting.

Sea Pines Plantation occupies the southern end of the island, and Harbour Town within it — with the distinctive red-and-white lighthouse, the marina, and the RBC Heritage golf tournament in April — is the public face of the Hilton Head resort industry. The Harbour Town Yacht Basin is a tidal marina: draft-limited access on the lower half of the tide, with the controlling depth in the channel running around 1.8 metres at mean low water. The RBC Heritage ties its gallery setup partly to the tidal creek edges.

The tidal creek system behind the island is one of the finest kayak environments on the East Coast. The Calibogue Sound flood brings warm nutrient-rich water into the marsh grass, and the grass flats that are exposed at low water and covered at high support redfish, flounder, and speckled trout. Guided kayak tours launch from multiple access points and time routes through the creeks to arrive at the deeper channels when the flood has raised the water sufficiently to float over the shallow grass. The 40-minute tidal creek window on the last hour of ebb — when the water drains across the flat grass revealing the sand beneath — is the best time to observe fiddler crabs, wading birds (great blue heron, tricoloured heron, roseate spoonbill in summer), and the occasional river otter.

Port Royal Sound to the north of the island is a wide, deep inlet with significant ship traffic — container ships and tankers navigate the Sound to the Port of Port Royal. The current in the Sound entrance at Page's Island runs to 3 knots on spring tides and the turbulent zone at the ebb front is a productive striped bass and bluefish location in autumn.

Loggerhead sea turtles nest on the Hilton Head ocean beaches from May through August. The Sea Turtle Patrol monitors nests, and beach visitors are asked not to use white lights or beach fires in nesting areas — turtle disorientation by artificial lights is a documented problem on developed barrier beaches.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically within plus or minus 45 minutes on timing and 0.2 to 0.3 metres on height — model-derived, not from a local gauge. For authoritative US tide data, consult NOAA CO-OPS at tidesandcurrents.noaa.gov.