Fisherman’s Resturant and Bar is a great spot imo that is located on San Clemente pier, I’ve had great meals there. Rare Society (pricey), Sonny’s (Italian), Momoku No Usagi (sushi pricey), Sol Agave, Costal Cowboy, Beach fire :)
Other options for sushi are 9Style, Dark Magic, and Malulu. Other Italian is Pronto. For Mexican, South of Nicks or Franco’s Famous. Burgers - Krazy Kooters. Fisherman’s is pretty darn hard to beat for selection, bar, and view/scene. So many options on Del Mar Ave. love the (pricey) Rare Society, but get a reservation and then share a board.