A long-period west-northwest swell will build through the day Saturday and peak Sunday morning with waves as high as nine feet.
The National Weather Service office in San Diego forecast the period of the swell at 15 to 17 seconds. The highest surf is expected in southern San Diego County.
A high surf advisory will be in effect from 2 p.m. Saturday to 9 p.m. Sunday.
The weather service warned of strong rip currents that could make swimming dangerous.
The swell and surf will subside on Monday.
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