Cardiff-by-the-Sea, usually referred to as Cardiff, is a beach community in the incorporated city of Encinitas in San Diego County, California. The Pacific Ocean is to the west of Cardiff-by-the-Sea, the rest of incorporated Encinitas is to the east and north, and a beach and lagoon to the south. With a population of under 12,000, Cardiff-by-the-Sea operates as part of the city of Encinitas, but unlike the other communities that comprise Encinitas, has its own ZIP code. Cardiff is home to a few well-known surf spots, such as Swami's and Cardiff Reef.