Paddlers from Hawaii, North America and the Netherlands will join Māori from around the motu when up to 10 waka take to the waters off Waitangi on Wednesday.
The waka crews are expected to depart from Haruru Falls and Waitangi boat ramp early in the morning and converge on Tii Beach, in front of Te Tii Marae, around 9.30am. There, the kaihoe (paddlers) will perform a series of mass haka and be greeted by Prime Minister Jacinda Ardern.
Ngā Waka Te Tai Tokerau chairman Robert Gabel said the number of kaihoe representing indigenous peoples from Hawaii and the US, including the Suqamish of Washington state, had been boosted this year by people keen to honour waka builder and master navigator Hekenukumai Busby, who will be knighted on the Treaty Grounds on Monday.
The fleet will include waka from Tauranga and Whakatane as well as Northland canoes such as the 30-metre Ngātokimatawhaorua, the world's largest waka in use.
Three members of Leiden University's Njord Royal Student Rowing Club in the Netherlands, kaitiaki of the only waka taua (war canoe) based in the Northern Hemisphere, will also be taking part.