You know what? I always thought that the windiest capital city in the world was Chicago but it seems that it isn't the case.
It has been one of those things I learned way back and I think the windiest capital ( there are windier places) maybe Cape Town.
wellington is windier than Perth so I would say it is one of those two or perhapes both as I have now found stuff about Perth being the 3rd windiest as well
As far as pots go, a half wine barrel is going to do us fine