Support for Labour is steady on 47 percent, while National has fallen one point to 32 percent in the latest TVNZ Colmar Brunton poll.
ACT is on 8 percent, Green on 6 percent, and NZ First continues to languish on 2 percent, well below the 5 percent needed to enter Parliament.
The previous Colmar Brunton poll had Labour on 47 percent, National on 33 percent, ACT on 8 percent, Green on 7 percent and NZ First on 1 percent.
Meanwhile a poll on the race for the Auckland Central seat released over the weekend showed the contest growing closer, with Labour's Helen White on 35 points, National's Emma Mellow on 30 and the Greens' Chlöe Swarbrick on 26.
Labour leader Jacinda Ardern fell for the first time in preferred Prime Minister stakes, down 4 percentage points to 50 percent. She is still far ahead of Judith Collins however, who was on 23 percent - unchanged from the previous Colmar Brunton poll.
Support for David Seymour and Winston Peters was unchanged on 2 percent and 1 percent respectively.
The results give Labour 60 seats, National 41, ACT 11 and the Greens 8. Labour would still need support from the Green Party to govern if these numbers prove accurate.
However, polls have tended to give the Green Party higher support than they actually receive on election day. Being so close to the 5 percent threshold required for a party to enter Parliament without an electorate seat will be a worry for them.
The party will be hoping Chlöe Swarbrick will be able to close the distance in Auckland Central to guarantee their place in Parliament should that happen, but the recent numbers show that is still unlikely.