Yes Cocoa Beach water is very clear. The closer the gulf stream is to the beach the clearer and the bluer the water becomes. The iconic Cocoa Beach Pier provides even more proof that the water is clear because you can easily see the bottom of ocean as you walk out onto the Cocoa Beach Pier.
How can I say that? Well basically Cocoa Beach is a barrier island and only about 1/2 of a mile wide from east to west on average. It is just under 5 miles from north to south so everything is actually very close together. Barrier Islands are also very common on the Gulf Coast. However, on the Gulf Coast the water is a slightly greener emerald colored tint as apposed to the beautiful blue and clear waters found at Cocoa Beach and on the Atlantic Beaches in Florida.
On the west side of Cocoa beach is the Indian River Lagoon and Banana River which have a brownish color water that only has a few feet of visibility. Note to self, swim on the east side. Cocoa Beach makes an excellent get away from Orlando. It is a Central Florida beach town and usually has beautiful calm weather. The Ron Jon Surf Shop can sell you all of the beach supplies you need and it is located on the north end of Cocoa Beach FL toward the Kennedy Space center.
Beautiful beaches are everywhere including the gulf side. You may not have the same wave action at Clearwater Beach or the best surf spots. However it is a gorgeous beach with local shops and beautiful powdery white sand beaches and great pier area. Clearwater makes a decent alternative to the Atlantic Side and the Clear waters that you will find at Cocoa Beach Florida.