[bildung]

Well I never said "onshore". Nevertheless, wikipedia has an example of an onshore wind farm with 60.2% in 2015: https://en.wikipedia.org/wiki/Capacity_factor#Wind_farm

[hokkos]

There is currently no offshore wind park in France.

Maybe you mean to compare wind in France with world best wind, but this is what you wrote.

"nuclears capacity factor in France (the country with a high nuclear buildout) is about 72%, while that of wind is about 50%"