The Federal Government declared the beach had to be closed because of the government shutdown.

^^^^^
Just another illegal and unconstitutional procedure designed to threaten and intimidate the citizens.
Here is the LAW:

The enumeration in the Constitution of certain rights shall not be construed to deny or disparage others retained by the people.

The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.