Was there with the missus in Sept last year, afternoon breezes but pretty light on (15kts).
As mentioned, it's pretty shallow and sharp and you'd want someone to launch you, or your gear will get shredded. The tide starts to whip through as well. If you were keen you could walk across the sandbar and down the beach 100m on the mainland and you'd be good to kite off there, mostly sandy and a bit more space.
I took one of the catamarans out to the reef and there is a pretty magic right out there, but a little intense for kiting unless you're committed. The staff get a little pissy if you take the canoes out in the surf as well.