A large, long period west-northwest swell will bring very large and potentially damaging surf to the Central Coast on Monday morning.

The large swell has been delayed a few hours but was just starting to move into the Central Coast waters early Monday. Some of this long period swell energy is expected to bring high surf conditions to west facing beaches of Los Angeles, Ventura, and southern Santa Barbara counties later Monday on into Tuesday, although those conditions will not be as significant as on the Central Coast.

Surf will build to 12-20 feet Monday morning, peaking on Monday afternoon through early Tuesday with breakers between 18 to 25 feet and local sets up to 30 feet. The highest surf will be on west to northwest facing beaches.

There is a significant threat of frequent, very strong rip currents and powerful breaking waves that can suddenly overtop rocks or jetties.

Sneaker waves may suddenly wash over previously dry sand or rocks, potentially sweeping bystanders into the water. There is a threat of significant beach erosion and possible damage to piers and coastal structures.

The very large surf and strong rip currents will bring extremely dangerous, potentially life-threatening conditions to inexperienced swimmers and surfers, with waves battering rocks and jetties. In addition, large breaking waves can be expected across the Morro Bay Harbor entrance, with the potential to capsize small boats.

City News Service contributed to this report.