Loads of waves out West and when a decent swell comes through the islands or from the North the east coast lights up (not very often though). Believe it or not but there are some nice waves on the North Shore in the right conditions but out West at the 4 main beaches you will have no shortage of swell - just wind to deal with. A few people will not be happy to see you so make sure you are good sport in the water. Enjoy.
A few not so secret spots in here
surfseeker.nz/