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Sunny California has very cold beaches. Anyone who’s taken a dip out of Los Angeles, San Francisco, or San Diego will know that California’s waters are not the most fun for swimming in. Indeed, the surface temperature of California’s ocean often hovers around 60 degrees Fahrenheit. Although one might wish for warmer water, California’s beaches are destined for chilliness because of the way ocean currents and upwelling work.
Ocean Currents Make for Chilly California Beaches
The ocean contains many different currents. Some are small and constantly changing, some extend over large swaths of the ocean and are relatively stable. An example of the latter is the North Pacific Gyre which is comprised of several currents moving water around the northern Pacific Ocean. The Gyre travels in a clockwise circular pattern moving water west across the equator, north up the coast of Asia, east below Alaska, and runs south along the California coast. This is the first reason California has cold water. The portion running south along the California coast is called the California Current. This current brings cold Alaskan waters down to California, waters which won’t warm up again until they’ve traveled along the equator.