High tides are spilling water onto coastal roads.

Drivers can expected flooding along the water in downtown Charleston early Wednesday morning, according to the National Weather Service.

Lockwood Boulevard was flooded after Tuesday’s high tide at 6:18 p.m., and similar conditions can be expected Wednesday morning, according to Steve Rowley, a meteorologist with the National Weather Service’s Charleston office.

Strong winds and a nearly full moon are raising water levels even without rainfall, prompting the Weather Service to issue a coastal flood advisory Tuesday night, he said. Another flood advisory will be in effect from 5 to 9 a.m. Wednesday morning. HIgh tide in Charleston Harbor is at 6:29 a.m.