High surf warning in effect for San Francisco through early Sunday

The National Weather Service has issued a High Surf Warning for San Francisco, Southern Monterey Bay, and the Big Sur Coast effective from 6 PM Friday until 4 AM Sunday, according to the NWS San Francisco office.

This warning includes dangerously large breaking waves ranging from 25 to 35 feet, with occasional sets reaching 40 to 50 feet at favored breakpoints. These conditions pose significant risks including coastal flooding, erosion, and hazardous beach conditions.

Earlier advisories include a Coastal Flood Advisory until 4 PM Friday with possible inundation up to 1.5 feet above ground in low-lying areas near shorelines and tidal waterways. A second Coastal Flood Advisory is in effect from midnight Friday night to 6 PM Saturday, when large waves may crash over seawalls and flood adjacent infrastructure.

The NWS cautions that high tides and large waves will bring water farther up beaches than usual, restricting safe escape routes. Swimmers and beachgoers face increased risks from strong rip currents and sneaker waves, which can sweep people into the sea and cause serious injury or drowning.

Residents and visitors are advised to stay away from beaches, jetties, and rocky shorelines during this period and to be alert for isolated road closures due to flooding or debris.