You will sometimes see kitesurfers on any of the big lakes around Munich. For example the Wörthsee, Starnberger See, or Ammersee. These three lakes, however, are not the most suitable. The Starnberger See only gets about 20 days per year which are suitable for kitesurfing. The kitesurfer's prefered lakes are Chiemsee, about an hour south east of Munich, near Rosenheim. And Achensee, an hour and a half directly south of Munich, just over the Austrian border. The best location in terms of suitable wind conditions, is a little further afield, at Gardasee in Northern Italy. This is aproximately 2 to 3 hours drive from Munich.
Getting kitted out with kitesurfing gear is not cheap. The costs are 700 for a kite, 300 for a board, 200 for a wetsuit (essential in the cold Bavarian lakes), and 250 for a harness and safety system. That's at least 1,450 in total. Note that these are starting prices only. You can pay up to twice as much for fancier kit. As far as I know there is only one kite surfing shop in Munich. And that is Kitemania at Humboldtstr. 17, near Kolumbusplatz, Giesing. Outside of Munich there is Element Sports which is at Wasserbergerstr. 9, in Stephanskirchen near Rosenheim (45 mins south of Munich).
Before splashing out on all your own kit, it is probably best to take a short course. Then you get both instruction and the hire of kit included in the price. Kitemania offer a 3 hour course for 50. This teaches theory and ground handling of a kite. There is no surfing. Element Sports offer kite and board hire, without instruction, at 40 per day. Their weekend training courses cost 200 for 2 days, 8 hours per day. If weather is unsuitable for flying, the hours can be carried over to another day. They also do week trips to Tarifa for 777.
Of course, in order to fly on a lake legally you have to have a permit. This is Germany, right? In this country you practically need a permit just to breath. By taking part in a training course your permit is sorted for you. If you wish to fly independently then you need to secure a permit from the authorities at the relevant lake. For Achensee permits you need to contact the Achensee Kite Club (PDF). The situation regarding permits on Gardasee is not known. Perhaps a knowledgable reader can give us feedback?
Kitemania
Humboldtstr. 17, Munich Giesing
Tel. 0176 60001344
Element Sports
Wasserburgerstr. 9a, Rosenheim Stephanskirchen
Tel. 08031 84850