SAN FRANCISCO—The National Weather Service’s Bay Area office issued a high surf advisory until 9 a.m. on Thursday, May 23. The Weather Service states that waves will be 15 to 17 feet with breaking waves up to 22 feet in the surf zone.

The largest waves are likely at beaches including Ocean Beach in San Francisco and Pillar Point in Half Moon Bay. According to the National Weather Service website, the high surf advisory begins at 3 p.m. on Tuesday, May 21.

Up to minute updates have been posted via social media on the NWS Twitter account.

“High surf advisory remains in effect through this evening,” the NWS tweeted on May 21. “Morning buoy reports show swells of 15’ with breaking surf up to 20’ this morning. #casurf #KnowYourLimits.”