A large west to northwest swell will bring high surf to the southern California coast from San Luis Obispo County to LA County. Surf heights are expected to peak in the 10 to 20 foot range from Sunday to Tuesday, and surf this large can cause dangerous conditions for boaters near shore and around exposed harbor entrances. Large breaking waves can overtop sea walls, and even overturn boats traveling through harbor entrances. Higher tides occurring with the high surf means minor coastal flooding is possible, with increased beach erosion and sea water reaching beach paths and parking lots.