National has shrugged off controversy over Maori water rights
and has climbed slightly in the latest ONE News Colmar Brunton
Prime Minister John Key's party is up to 48% in tonight's poll, while Labour and the Greens have both dipped slightly - to 32% and 12% respectively.
The poll shows the ongoing debate around asset sales and other issues, including donations to John Banks, have done National no harm.
And, although Key's rating as preferred Prime Minister has fallen by three points, he remains strong on 45%. Key is well ahead of Labour leader David Shearer who is on 13%, down one on the last poll.
ONE News Political Editor Corin Dann said: "It's a heartening poll for National as it continues to do battle over its asset sales.
"For Labour it's disappointing, especially for David Shearer who can now expect more heat from within his party over his failure to connect with the public."
Support for New Zealand first is steady on 3% in tonight's poll while the Maori Party is up one on 2% and Act and the Conservatives are each on 1%.
Translated into seats in Parliament, if an election was held tomorrow the poll suggests National would have 60 seats and could govern with Maori Party, Act and United Future support.
Labour, the Greens and Mana would have 56 seats if they formed a block, not enough to form a majority.
The poll has a margin of error of +/- 3.1%.