Coastal Flood — Charleston, South Carolina

2025-10-09 · Charleston, South Carolina

Event narrative

The media relayed a video on social media showing significant beach erosion from coastal flooding as additional waves washed ashore at Thomson Park in Breach Inlet.

Wider weather episode

Strong northeast winds resulting from high pressure building inland and developing low pressure offshore along with astronomical influences associated with a recent full moon and perigee led to coastal flooding along the South Carolina coast. A maximum tide level of 7.91 ft MLLW (2.14 ft MHHW) was observed at 912 AM EST at the Charleston Harbor tide gage during this event. Moderate coastal flooding impacts are typically observed along coastal Charleston and Colleton Counties when tide levels reach 7.5 ft MLLW (1.73 ft MHHW) in the Charleston Harbor.

Source: NOAA Storm Events Database, event_id 1295214. Narrative written by the NWS forecast office that issued the report.