Homes in Cardiff by the Sea Cardiff by the Sea, California, is a luxurious and comfortable beach community resting between Encinitas and Solana Beach in San Diego County. Over eighty years ago, this farming community in the hills north of the San Elijo Lagoon began to take root and 11-09-2007 by toastey Tags cardiff by the sea, condos, homes, ocean view, san diego, san elijo