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 are under a high surf advisory which was released by the National Weather Service on Wednesday at 3:34 a.m. The advisory is valid from Thursday 5 a.m. until Friday, Mar. 28 at 11 a.m.

The NWS San Francisco CA adds to be ready for, “Long period very high northwest swell will result in large breaking waves between 25 to 30 feet on north and west facing beaches.”

“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,” according to the NWS. “Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Remain out of the water to avoid hazardous swimming conditions.”