Association chief executive Kevin O'Sullivan said the massive growth predicted for 2018/19 was driven by more visits from six cruise ships - Ovation of the Seas, Celebrity Solstice, Radiance of the Seas, Majestic Princess, Golden Princess and Norwegian Jade.
However, O'Sullivan warned that port infrastructure was critically important to maintain visits by the large cruise ships and the greater number of passengers.
"These ships are getting larger, and in some ports such as Auckland we currently lack the infrastructure for some of these ships to berth - they have to use tenders to transfer passengers to shore, which impacts on the visitor experience."