The California Current is a cold ocean current that flows southward along the California coast, cooling the coastal waters.

The California Current, originating in the North Pacific Ocean, brings cold water down the western coast of North America, influencing the coastal climate of California and other Pacific Coast regions. This cold current cools the coastal waters, which has a significant impact on the local weather, often keeping temperatures mild and reducing the likelihood of extreme heat during summer. It also contributes to foggy conditions along the coast, especially during the warmer months, as the cooler air interacts with warmer air inland. This cooling effect also helps moderate the climate, preventing high temperatures.