Not all beaches along the California coastline are recommended for swimming or wading. The very things that make these areas such spectacular places to look at and enjoy can be lethal to those caught unaware along the shoreline.
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But on that same beach, it's not uncommon to see kids shivering as they run out of the water, or a surfer wearing a partial wetsuit as they jog out for a session. California's ocean water is pretty cold, even in the summer, and it often catches visitors off-guard.
The upwelling further cools the already cool California Current. This is the mechanism that produces California's characteristic coastal fog and cool ocean waters. As a result, ocean surf temperatures are much colder along the Pacific coast than the Atlantic coast.
The water temperature in the ocean in Los Angeles varies throughout the year, but generally, it is warm enough to swim from late spring to early fall. The warmest months are typically July, August, and September, when ocean temperatures can reach into the low 70s Fahrenheit (low 20s Celsius).
With 113 kilometers (70 miles) of gorgeous coastline and tons of beaches, you'll enjoy lots of great swimming spots in this city. San Diego has warm waters, sandy shores, and plenty of activities for water recreation enthusiasts.
“So the reason why these beaches are usually dirty is mainly because of their limited water circulation, which leads to prolonged pollution near the shore,” Wu said. “This means the circulation is not enough to flush away all pollution when it happens.
It's about what's in the waterAlong certain coasts, finer particles like sand and silt can add to the water's murkiness since they're easily agitated and stay afloat for long periods. On the other hand, the sediments off clearer coasts may be heavier and coarser.