Here's an interesting status report by Investopedia on the development of offshore wind farms. The article says approximately a dozen offshore wind farms are in the regulatory pipeline.
A big bonus with offshore wind farms along the Eastern Seaboard is that they would be located near many of the nation's largest population centers in the megalopolis stretching from the Boston ‘burbs southward through Connecticut, New York, New Jersey, Philadelphia, Delaware, and down to Washington, D.C., and northern Virginia. This area is home to an estimated 44 million people -- approximately 16% of the entire U.S. population. That's a big contrast from lightly populated Wind Belt that extends from the Dakotas and southwestern Minnesota through Nebraska, Iowa, Kansas, Oklahoma and into Texas, where the power produced by wind farms on the Great Plains often must travel many miles to metropolitan areas.