A large west to northwest swell will bring extended period of high surf to the southern California coast today into much of next week. Surf heights are expected to peak Monday into Tuesday, morning when there is an increased risk of damaging surf and coastal flooding of beach roadways and parking lots for the Central Coast and Ventura Coast. This will 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.