When the possibility of a NZ trip was posted I thought I'd have a look around on GE (as you do). Not ever having set foot into NZ I could only go from what I've heard and the name Windy Wellington came to mind. So this is what I thought looked a possibility. Weldon is ~180 meters AGL and this site is ~ 300 meters above ASL/AGL. The Tekapo hill has the same orientation so it's for a WNW wind.
Is it worth a look?
Hope this works