Værmelding for Steamship Wharf (historical)

High Surf Advisory issued December 27 at 9:43AM PST until December 29 at 4:00AM PST by NWS San Francisco CA* WHAT...Large breaking waves of 20 to 30 feet.* WHERE...San Francisco, Coastal North Bay Including Point ReyesNational Seashore, San Francisco Peninsula Coast, NorthernMonterey Bay and Southern Monterey Bay and the Big Sur Coast.* WHEN...Until 4 AM PST Sunday.* IMPACTS...Dangerous swimming and surfing conditions andlocalized beach erosion can be expected. Large waves can sweepacross the beach without warning, pulling people into the seafrom rocks, jetties and beaches. Sudden immersion in coldwater can result in cold water shock even for the mostexperienced swimmers. Cold water shock can result in dramaticchanges in breathing, heart rate and blood pressure, greatlyincreasing the risk of drowning in rough open waters.Inexperienced swimmers should remain out of the water due todangerous surf conditions.

National Weather Service