The Labour Party's support remains mired in the low 30 per cent range despite its bold policy promises.
The poll showed that if an election were held today 31.6 per cent would vote for Labour, a drop of five points since the beginning of the year.
Despite National facing intense public pressure over spying law changes and proposed changes to snapper quotas, its support dropped just 1 point since May to 48.3 per cent.
In the last two months, Labour made a popular promise to ban foreign speculators from the housing market in attempt to help struggling first-home buyers.
But it also received negative attention for its proposed "man-ban", a proposal to increase the proportion of female MPs in caucus by blocking male candidates in some electorate seats.
There were only minor changes in support for other parties. Greens polled 12.3 per cent, New Zealand First 2.8 per cent, Maori Party 1 per cent, and Conservatives 1.4 per cent.
The poll had a margin of error of 3.1 per cent.