Sandbars are located all around the coasts in the state of Florida. A Sandbar in Florida is an area of sand or other fine sediment that sits above the water. Large sandbars are known in Florida as barrier islands. And while sandbars will typically peak be exposed above water, there are some popular sandbars in Florida that are just below the surface.
Sandbars generally run in a straight line parallel to the mainland on the coast in Florida. Sandbars are formed by continuous waves pulling material from the shoreline which can happen after a storm or over a long period of time. Over time, these can build and rise above the water's surface. It is common in Florida to have small sandbars just offshore along the beaches that occasionally appear and can become a fun spot for locals. These are typically underwater most of the day, so you don't know they are there until you see people standing knee deep in water beyond where there are swimmers. But at low tide, you can see them rising above the surface.