Wind is pretty fickle already. I sail a lot on the Long Island Sound (25 miles north-east of NYC). On hot afternoons the bridges create thermals that completely screw with the prevailing "natural" wind. You can feel the effects 10-15 miles away.
I don't think it's a bad thing at all, it doesn't impact the macro climate just the local power of the wind and direction, but it is noticeable. There are all sorts of micro influences based on the buildings on land as well that matter to sailing, but the overall picture is dominated by the weather rolling through on any given day. A bridge or a building or a big open parking lot might shift the direction a few degrees or locally increase/decrease the wind, but that's it.
I don't think it's a bad thing at all, it doesn't impact the macro climate just the local power of the wind and direction, but it is noticeable. There are all sorts of micro influences based on the buildings on land as well that matter to sailing, but the overall picture is dominated by the weather rolling through on any given day. A bridge or a building or a big open parking lot might shift the direction a few degrees or locally increase/decrease the wind, but that's it.
I doubt wind turbines do much more than that.