Coastal Duval County, Florida, is under a Coastal Flood Warning issued by the National Weather Service (NWS) Jacksonville, FL. The warning, which forecasts significant coastal flooding, takes effect at 5 AM EDT on Saturday, October 24, and remains in place until 8 PM EDT on Monday, October 26, 2026. A High Rip Current Risk is also in effect through Monday evening.

The NWS issued the warning at 7:09 PM EDT on October 23, 2026. Earlier, a Coastal Flood Advisory was in effect until 5 AM EDT Saturday, predicting minor coastal flooding. A Coastal Flood Watch also remains in effect through Monday for northeast Florida and southeast Georgia. The City of Jacksonville's Emergency Preparedness Division is monitoring the weather system and is in regular contact with the National Weather Service regarding potential local impacts.

Forecasters expect numerous roads to close, and low-lying properties, including homes, businesses, and some critical infrastructure, may be inundated. Some shoreline erosion is also anticipated. Dangerous rip currents can sweep even strong swimmers away from shore into deeper water.

This flooding is attributed to a strengthening area of low pressure near the Bahamas, high pressure to the north, persistent onshore winds, and higher astronomical tides. A full moon on Monday contributes to these higher tides. Water levels could reach approximately 1.5 to 2.5 feet above normal, potentially leading to moderate to locally major tidal flooding. Tides are projected to average 2.0 to 3.5 feet above normal. Water levels could peak 2 to 3.5 feet above normally dry ground around high tide from Saturday evening through early Monday.

Wind gusts could reach 35 to 45 mph Sunday into Monday, particularly along the immediate coastline. These strong northeasterly winds will push water toward Florida's coastline and into waterways. Other hazards include major beach erosion near high tides this weekend and next week. St. Johns County officials advise residents to secure loose outdoor items, such as holiday decorations and patio furniture. They also stressed that drivers should never attempt to cross flooded roads. Rainfall is in the forecast, but the main concern is the combination of winds, tides, and surf. The Coastal Flood Watch may be extended into Tuesday or Wednesday if conditions warrant.