I guess it mostly depends on what you are interested in. November is too early for gamefishing but there are other deep water options such as bass, bluenose and hapuku typically caught bottom fishing in 200m plus - I don't do much of that but I'm guessing November would be ok. Snapper fishing at that time of year is very good in up to 60m especially in the Hauraki Gulf or the North Islands west coast. 

Yellowtail kingfish are a fantastic fish to target and there are a number of charters that cater for small groups from Tairua to Northland.

Try our Freshwater forum for advice on lakes and rivers. There are plenty of good guides but I don't have any contacts.