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For the warmest ocean swim off the west coast of the United States, your best chances are Newport Beach in early August or at Avalon on Santa Catalina Island in mid to late August. At both places, the Pacific Ocean temperature peaks at 70 degrees F (21 °C).
Makunufushi Island, MaldivesThe Maldives doesn't have a swimming season because the water is always warm enough (82 to 86 degrees) to dive right in and splash around. There are tons of gorgeous beaches, but we're partial to the private island of Makunufushi.
Water temperatures range from the low 50s in winter to the low 70s in the summer. If you plan to spend a lot of time in the water during non-summer months, you'll want to wear a close-fitting wetsuit.
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.
With over 120 kilometers (75 miles) of coastline and over 100 beaches, Los Angeles is the perfect place to get your toes wet. The city features plenty of island, coastal, and inland swimming spots.
Anaheim. Anaheim, home of Disneyland Resort and Knotts Berry Farm, is one of the two warmest places in California in December–the other being Palm Springs. December is the first winter month in Anaheim, with daily high temperatures ranging between 67°F to 69°F.
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.
Florida is the hotter and more humid state when compared to California; you might even want to call it tropical. Although Florida doesn't have as much of a diverse landscape as the Golden State, it has miles of incredible beaches, and life is very much focused on the coast.
Yes, you can definitely swim at Santa Monica Beach as well as enjoy other water activities like surfing or paddle boarding. Even with 280 days of Santa Monica sunshine, the Pacific Ocean tends to be a little cold, so you may want to consider swimming during warmer months.