The season is upon us here are the vhf channels for those who wish to keep them.
Admins may want to pin this one for a while. Coast Gaurd sent me this.

Coastguard VHF Marine Radio Coverage
Ch 16 International Distress - Safety and Calling Frequency.
Also Calling Channel Coastguard and other vessels. Except in an emergency
situation, move to a suitable working channel after making initial contact with
station being called.
Ch 60, 61, 83 Calling/Working Channel for Coastguard.
Far North.
Ch 64 Calling/Working Channel for Coastguard.
Whangarei.
Ch 66 Calling/Working Channel for Coastguard.
North Kaipara.
Ch 80 Calling/Working Channel for Coastguard.
Waitemata Harbour and Inner Hauraki Gulf.
Ch 81 Calling/Working Channel for Coastguard.
Manukau Harbour and west coast located on South Head.
Ch 82 Calling/Working Channel for Coastguard.
Outer Hauraki Gulf. Effective range is from Mayor Island to North of Tutukaka.
Repeater located on Moehau Ranges, Coromandel.
Ch 82 Calling/Working Channel for Coastguard.
Hokianga.
Ch 84 Calling/Working Channel for Coastguard.
Whangaroa.
Ch 84 Calling/Working Channel for Coastguard.
Kaipara Harbour and west coast located on South Head.
Ch 85 Calling/Working Channel for Coastguard.
Tutukaka, Whangaruru and Poor Knights area.
Ch 86 Calling/Working Channel for Coastguard.
Bay of Islands.
Ch 86 Calling/Working Channel for Coastguard.
Raglan/Kawhia harbours and west coast, linked to Channel 81.
Ch 86 Calling/Working Channel for Coastguard.
Whitianga.
Continuous Weather & Maritime Safety Service Nowcasting
Half Moon Bay Marina Nowcasting provides Peak and Average wind strength (Knots)
and direction (true bearings) from sites around the Northern Region.
Ch 20 Outer Hauraki Gulf - Doubtless Bay and Ahipara.
Ch 21 Inner Gulf and Waitemata/Manukau Harbours.
Ch 23 Kaipara Harbour and immediate West Coast.
Ch 21 Bay of Islands - north to Whangaroa and south to Whangaruru.
Boat to Boat Channels
Ch 04 Tutukaka, Ch 03 Kawau, Ch 62 Whangaroa, Waiheke, Ch 65 Coromandel, Ch 63 Manukau, Ch 04 Raglan.
Ch 06 & 08 Inter boat working and chat.

Great info there thanks BA.

This was probably put together by Coastguard Northern Region. The other regions probably do the same and maybe on their websites.

Links to these are at the very bottom of this page: http://www.nzcoastguard.org.nz/localunits