ENZED in March-April wetsuit requirements

Depends which coastlines you end up surfing. Seeing you're just based on the North Island, I reckon a 3/2 could be sufficient for the most part as we're coming off the back of the warmest time of the year (especially if it's a good quality, recent model 3/2). Though I'm sure someone else will have more indepth knowledge. 

3/2 should be fine
West coast is pretty much boardies at the moment
Temp won't plummet till late May probs

Nice one, thanks fellas. For the record, it's a Need Essentials 3:2 that's still in pretty good nick after a couple of summers' use.

Take both! I remember my first surf down Taranaki way, it was around ANZAC day, raining and cold but great waves. Came in, the clouds parted and there was Mt Taranaki with bloody snow on it! Water was ok but wind - brrrrrrr ...

You'll be fine in a 3/2 or less from Taranaki and north around to the east cape. South east coast pack your 4/3.