The ocean at San Diego is some kinda cold. When I was at the Porsche Parade in San Diego a few years ago we got to go across the bridge to the Navy or Marine base and play on their private beach. No cigarette butts, no broken glass and no mass of humanity. I looked at the waves and thought a dip might be fun. I stuck my foot in the water and QUICKLY pulled it out. Yikes that was cold. Ain't no way I am swimming in that water.
The beach was beautiful. Heck all of San Diego is wonderful. Where else on the planet can you hold a fancy dinner on the deck of an air craft carrier at night for a thousand friends.