While the US has three very long coasts, much of it is similar to this section of France, and is the reason why current offshore wind may be limited there.  The difference is the US has a Saudi Arabia worth of undeveloped onshore, even if that entails significant transmission cabling and costs.

Another possibility looms in the near future.  Floating designs are already being tested, and more are on the drawing boards.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin