SAN FRANCISCO (KCBS) — The National Weather Service has issued an important warning to the many people heading to Bay Area beaches on this warm, sunny weekend.

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Meteorologist Duane Dykema says swimmers should be aware of some very dangerous conditions.

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Swimmers are advised to watch out for rip currents, sneaker waves and breakers as high as 20 feet.

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The beach hazard warning is in effect in the Bay Area until Monday morning with the most dangerous beach conditions expected Sunday.