The National Weather Service moved up a beach hazards statement for parts of the Bay Area and Central Coast on Wednesday as rough seas arrived earlier than expected. Breaking waves of 15 to 20 feet are possible through Friday afternoon. A high surf warning follows from 6 p.m. Friday, Nov. 13, through 4 a.m. Sunday, Nov. 15, Pacific time, when forecasters expect breaking waves of 25 to 30 feet.

The weather service bulletin covers exposed Pacific beaches in the coastal North Bay, including Point Reyes National Seashore, as well as San Francisco, the San Francisco Peninsula coast, Monterey Bay and Big Sur. Sneaker waves can sweep across the shoreline without warning. The weather service advises staying out of the water and off jetties, piers and shoreline rocks.

A separate coastal flood advisory runs until 4 p.m. Friday. It covers the San Francisco Bay shoreline, North Bay interior valleys, San Francisco and the southern Monterey Bay and Big Sur coast. Up to 1.5 feet of water could cover low-lying areas near shorelines and tidal waterways. Some roads may close. At the San Francisco tide gauge, the weather service expects high tide at 12:10 p.m. Thursday and 12:49 p.m. Friday. High tide can arrive at a different time elsewhere along the coast and bay.

If a road floods, follow posted closures and stay out of water of unknown depth. The local National Weather Service office posts updates as the surf and tide forecasts change.