Time of year when you have to be here to grab it - often just a few hours - not very predictable - with a couple of sweet days thrown in.
Moving to summer gets more predictable and generally stronger on shore it...
Stay O/S for a few more weeks where the kiting is good if U can
reg.bom.gov.au/cgi-bin/climate/cgi_bin_scripts/windrose_selector.cgi
Shows trend - October 3 pm Brisbane is considerably more windy on average than September and less likely to be offshore.

Cheers
AP

I was in Rainbow Beach last week. In the forecast on seabreeze the predictions were really bad(no more than 14).
When I arrived at the beach I found a beautiful 17kts and kept like that until 5pm.

I don't understand how seabreeze gets the predictions, but I always bring my kite no matters what the forecast says.

Good luck!