Coastal North Bay including Point Reyes National Seashore, San Francisco Peninsula Coast and Southern Monterey Bay and Big Sur Coast as well as San Francisco County were placed under a high surf advisory by the National Weather Service on Thursday at 2:55 p.m. The advisory is in effect until Monday, Mar. 3 at 9 p.m.

The NWS San Francisco CA says to be ready for, “Westerly swell 7 feet with swell periods 16 seconds with occasional breakers to 12 feet except swell periods up to 20 seconds resulting in breakers near 14 feet Friday night and Saturday morning. Westerly swell then increasing to 10 to 11 feet with swell periods 17 seconds resulting in breakers up to 19 feet from Saturday morning through Monday evening.”

“Dangerous swimming and surfing conditions and localized beach erosion. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris,” the NWS said. “Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Remain out of the water to avoid hazardous swimming conditions.”