The racing takes place in Biscayne Bay - out of reach for shore spectating, except one might enjoy a brief panoramic view of all the courses in action.
Perhaps there might be powerboats for charter, for spectating, somewhere in the Coral Reef Yacht Club (Coconut Grove) area.
On the water spectating is doable - just remain outside the picket for the coach boats (moving around the course) and shoot as much video or take as many photos as you like.
