Beelzebub said..
My advice is to reschedule your visit to NZ. November through February is usually very good (for kiting) in WA. No need for a 12m then either (at 75 kg 6-9 meters would be right most of the time)
Don't listen to him.... nz is rocking oct/ through to Jan.... its the best time of the year! The year is predicted super el nino patter which means constant wind and swell for months.
If you want advice on nz north island kite spots I can help