A century of sea level rise in thirty years.

The barrier islands of southeastern North Carolina are built of sand, shaped by waves and tides, and they have always moved. What has changed is that homes, roads and infrastructure now sit on them, and the water is rising underneath. NOAA’s 2022 report projects that by 2050, moderate (typically damaging) high-tide flooding will occur, on average across U.S. coasts, more than ten times as often as it does today, and that local factors can make it worse.

Coastal communities here have invested heavily, and often wisely, in beach nourishment and inlet management. Public agencies also hold long records for this coast: the Wilmington tide gauge, wave hindcasts, decades of aerial photography and the monitoring that accompanies the Mason Inlet relocation. What has been harder to fund is measurement that ties those pieces together at one site: water level, currents, waves, sediment and repeat surveys of the seafloor and beach, recorded together across both inlets and the island between them and continued past the life of any single project. The observatory is built to add that record on top of the public datasets, not in place of them. Every option a community may weigh, whether nourishment, inlet management, conservation, or, where a community chooses it, retreat, is more effective and less expensive when it rests on a clear record of what the shoreline is doing.