Wave farms have yet to pan out and may not ever pending some technology leap. They just don’t produce enough power for how much maintenance they require. Salty water full of debris and living stuff is a bitch.

As far as wind farms go, they are cheaper to put on land due to how much open space the US has, so therefore that is where they go. Building and maintaining the things are much, much cheaper when you don’t need a boat to get to them.