Harbor seals are the most commonly seen seals along the California coastline, especially in coastal areas and estuaries.

Harbor seals are frequently observed along the California coastline, often hauled out on rocks, beaches, or docks. These seals are smaller and more adaptable to various coastal habitats, from rocky shorelines to sandy beaches. They can be seen year-round, particularly in places like the Channel Islands, Monterey Bay, and the Farallon Islands. While sea lions and elephant seals are also found in the region, harbor seals are the most abundant and widespread species along California's coast.