If you want to swim by yourself without huge crowds and condos rising from the sand right behind you, a good beach to try is the 85th Street Beach, which runs along Collins Avenue. Lifeguards are on patrol during the day and there are relatively clean bathrooms available, so the only thing you need to bring is some sunscreen lotion and a beach attitude.

Lummus Park Beach is a great place to go if you want to be right in the middle of all the action. You can be sure to encounter plenty of perfect tans and washboard abs and perhaps more than you are willing to see if you do not approve of topless beaches. Otherwise, the Lummus Park Beach is a safe bet for those who want to enjoy the sun.

For some of Miami's biggest swells, you can try Haulover Beach. Miami surfers flock there because of the consistency of the waves and the heights that they can reach, so if you count yourself among those who know their way around a surfboard, it might be the perfect place for you. Be careful, though, because there are plenty of locals riding the waves.

If you want to explore some of Florida's untamed wilderness, you can try the Bill Baggs Cape Florida State Park. There are miles of undeveloped beach, a historic lighthouse, and nature trails that you can enjoy, especially if you are someone who shies away from overdeveloped areas. No matter which of these beaches you choose, though, you can be sure that they offer a good time.