This is a nice beach club. If you walk to the boat jetty, you can rig your kite there and launch it. Then you have to jump from the boat jetty to access the water. Tricky launch.
When you come back you need somebody to wait at the boat jetty to catch your kite. You will approach from the water. You need good timing because there is not a lot space to land your kite. Only for experts! Crowded on Fridays.
Don't kiteboard "nearly naked". I did wear kite trousers. You can use a short wetsuit, but it's also possible without wet suit. Only with lycra. Depends on your personal preferences.
Wind increases thermally in the early afternoon. Best month are December to February. You can expect 14-22 knots. All wind information on the web shows 3-5 knots less than you will have actually! Wind is pretty steady.
not good for southern wind directions. also 100%north is usually a bit less due to constructions around the lagoon.
Don't expect a lot signs. From Jeddah go north on Madinah Rd. Drive around the small lagoon. Then you will pass all beach clubs north of Yeddah. There will be no sign at any beach club. You have to know the club or ask for it. Or use your GPS (Entry at 21.7727N 39.0556 E). Driving north about 400m after a pretty mosque on the right you will see to your left blue door with 2 palm trees and a sign saying "private beach".