Hi waroc,
kitesurf sound in Germany is nearly the same like in France

There are a lot of young people, which like kitesurfing, good feeling, good music und a relaxed atmosphere at the beaches of the North and the Baltic Sea and the banks of many lakes in Germany. Although Germany is not as large as France and less versatile, it makes a difference, if you will stay in the North, the South, the East or in West Germany. In the North you have North Sea and Baltic Sea with good wind conditions, especially at the North Sea coast. From West Germany you reach the dutch North Sea coast in a few hours. If you stay in the South or the East of Germany, you'll find some interesting lakes, where you can kite.
Au revoir
August