Among those appearing today are Te Aute College and Southland combination Te Wharekura o Arowhenua.
The finals system was introduced two years ago when the festival was held in Gisborne.
A group of more than 40 judges from throughout the country are rostered to officiate during the performances.
With about 4000 people in Hawke's Bay for the festival, most remaining sessions are fully booked.
Today's programme:
Pool B, Session 1, 9am:
* Te Whanau Tahi (Naenae College, Wairarapa/Te Awakairangi).
* Te Kapa Haka o Te Toi Huarewa (Te Kura Kaupapa Maori o Te Whanau Tahi/Hornby High School/Christchurch BHS).
* Nga Potiki Hononga Kura (Te Kura Kaupapa Maori o Tupoho/Te Kura o Kokohuia/Taranaki-Whanganui).
* Te Wharekura o Mauao (Mataatua).
* Te Wharekura o Rakaumangamanga (Tainui)
Pool B, Session 2, 1.10pm:
* Te Kura Kaupapa Maori o Kawakawa Mai Tawhiti (Te Tairawhiti).
* King's College (Tamaki Makaurau).
* Nga Taiatea Wharekura (Tainui).
* Te Aute College (Te Matau-a-Maui).
Pool B, Session 3, 4.40pm:
* Te Wharekura o Arowhenua (Otakou/Murihiku).
* Te Rouroukura (Nelson College/Marlborough Girls College, Te Tau Ihu o Te Waka-a-Maui).
* Te Manawa Tahi (Te Kura Kaupapa Maori o Horouta Wananga/Te Kura Kaupapa Maori o Nga Uri a Mau, Te Tai Rawhiti).
* Te Wharekura o Ruatoki (Mataatua).