It will also cater to the culinary side of the marine world, with seafood tastings, cooking demonstrations, and offerings from local suppliers.
The organisers said the event will have something for every member of the marine community, including boating and fishing enthusiasts, divers and ocean conservationists.
The event follows in the footsteps of the Boat, Fishing and Leisure Show which ran from 2002 to 2011.
Mystery Creek Events Centre will host the inaugural NZ Boat, Fish and Dive Expo in late August.
National Fieldays Society chief executive Peter Nation said the society was thrilled to welcome this type of event to Mystery Creek.
“We ... feel it is exactly what water sports enthusiasts living in and around the Waikato and King Country need.
“We have so many amazing lakes and rivers right on our doorstep that offer endless opportunities for boating, fishing, diving and other aquatic adventures.”