Roads and houses in some parts of Cape Town have been damaged by flooding, the National Sea Rescue Institute said on Friday.

"Rough sea conditions during spring high tide in the early hours of this morning, [Friday] caused some flood damage to some roads and reportedly also to some houses," said the NSRI spokesman Craig Lambinon in a statement.

A camping site at Silverstroomstrand also had to be evacuated.

As well as this West Coast location, other areas affected by the flooding included Melkbosstrand, Milnerton, Hout Bay, Kleinbaai, part of Bloubergstrand, Derde Steen, Tweede Steen, Riebeekstrand and parts of Baden Powell Drive -- on the False Bay Coast.

Certain roads in the areas have been closed temporarily for mop-up operations.

"Debris and sea sand washed onto the road."

Lambinon said that bathers and boaters in Plettenberg Bay and Cape Columbine should be on high alert as rough weather was expected.

He said that along the coast there would be high tides in the early evening.

"Strong rip currents can be expected around the coast."