Flochella will feature a host of New Zealand musicians including Theia, Maala, Mitch James and Jupiter Project.
The New Zealand Bomb Comp starts Saturday at 10am.
The event is open to all ages, is family friendly and strictly alcohol-free. There will also be a number of food and beverage vendors on site.
Flochella starts at 3pm on Sunday. ZM have 300 floaties to give out, but festival-goers are welcome to bring their own.
ZM content director Ross Flahive said his team were always looking to throw outside-the-box events for Kiwis.
"ZM is excited to bring together some great Kiwi acts for something completely different.
"This is something that's never been done here before and it's great to see New Zealanders have responded so well to the idea.
"Flochella will be an awesome way to celebrate Waitangi Weekend."
The festival has a maximum capacity so people will need to get in quick.
Tickets for New Zealand Bomb Comp can be bought online or on the day. For more information visit either nzbombcomp.co.nz or zmonline.com.