Strong rip currents and higher than average surf are expected today along the San Diego County coastline, along with minor tidal flooding as a swell moves through coastal waters, forecasters said.
A National Weather Service beach hazards statement for the county's coastal areas is set to take effect this afternoon and extend through late Monday night.
Forecasters said a long-period southern hemisphere swell would begin to move through the coastal waters off Southern California this afternoon, and would peak Friday night into Saturday.
A potentially larger swell pushed by Tropical Storm Norbert could hit south-facing beaches late Sunday into Monday.
"The combination of these swells and large tides will bring the potential of local coastal flooding at times of high tide,'' the weather service statement said.
``The elevated surf and large tidal swings will mean strong rip and long shore currents at area beaches.''
The waves and surf are expected to build late this afternoon to 4 to 6 feet with local sets of up to 8 feet at favored south- and southwest-facing beaches, according to the NWS.
The currents could result in dangerous swimming conditions, especially for those with little experience in the water, according to the weather service.
Beachgoers were advised to obey posted warning signs, use caution in and around the water and to swim near a lifeguard.