Forget about kiting on water over there. I have heard that the mountains (Mount Damavand and Dizin ski resort) and foot hills surrounding Tehran get covered in several feet of snow. My buddy is also planning on going some time in April. He showed me some photos and it looks amazing for snowkiting.
You might even like snowkiting better than kitesurfing
Check out Mount Damavand on Google Earth - it is the huge volcano just to the East of Tehran. Or see http://www.sk-branik.si/dusan/iran/damavand.jpg
Please send a report and photos.