Egypt is one of the few kite destinations that has year round, consistent wind. There truly isn't a bad time to visit Egypt for a kite trip, but the summer months will mean no wetsuit and have the most consistent and strongest wind. In the spring and fall, you might need a shorty and a 3/2 in the winter months. Tourism is also pretty much year round in the region, so you won't have to worry much about a busy season to contend with. If you choose to take a boat based kite safari, you will be truly remote and feel like you have the whole world to yourself, only seeing other groups occasionally.
The other perk of Egypt is that it is perfect for beginners. Tons of flat water areas, which have mostly sandbars underneath, and shallow water that you can stand in make for the ideal conditions for new riders. There are plenty of camps in the area where you can join others who are also learning. The shore based camps are an incredible way to quickly progress in the sport of kiteboarding. For more advanced riders, the powerful wind and flats make for great speed riding and the sandbars near shore create a natural playground. With a boat, you can access multiple zones and find incredible, deserted spots for a session.