The first white kiwi to ever hatch in captivity, Manukura, was born at the wildlife centre in May last year, and her brother Mauriora was born in December.
The latest egg hatched in the centre's kiwi nursery on Monday, said centre manager Kathy Houkamau.
"We did know there was the chance of another white kiwi, so of course we weren't surprised, but it is still exciting for us," she said.
"It is rare enough that two brown kiwi carrying the rare recessive white gene mate in the first place, that they would go on to produce three white kiwi is ... well, we're very blessed."
Ms Houkamau said all three chicks have the same father, and it was likely they had the same mother as all eggs were found in the same place.