The National Party has climbed to 47 per cent in the latest 1News-Colmar Brunton poll, up 2 percentage points to its highest level of support since coming into Opposition in 2017.

National is now seven percentage points above Labour, who are polling at 40 per cent – down 3 percentage points on the last Colmar Brunton poll taken in late July.

The numbers show that National, along with Act, could form a Government.

When it comes to seats in Parliament, National alone would have 60 seats; 61 with ACT – enough to form a Government.

Labour would have 51 seats; combine with the Greens' eight the two parties would have 59.

The Greens are at 7 per cent and New Zealand First remains below the 5 per cent threshold to 4 per cent – both parties were up 1 percentage point compared to the last poll.

When it comes to the preferred Prime Minister rankings, Prime Minister Jacinda Ardern is at 38 per cent, down 3 points.

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The support lost by Ardern was picked up by National Leader Simon Bridges, who jumped 3 percentage points to 9 per cent.

He's clear of Senior National MP Judith Collins, on 5 per cent and Winston Peters, who is on 4 per cent.

Tonight's poll comes just a day after a Newshub-Reid Research poll, which showed both Labour and the Prime Minister's popularity had fallen.

Labour polled at 41.6 per cent, falling 9.2 percentage points compared to the last Reid Research poll.

Meanwhile, National is up 6.5 per cent to 43.9.

Ardern dropped 10.6 percentage points to 38.4 per cent in the preferred Prime Minister ranking but was still well ahead of National Leader Simon Bridges on ranking – he jumped 2.5 percentage points to 6.7 per cent.

This is the fifth 1News-Colmar Brunton political poll of the year.

The poll also registered 18 per cent of voters are unsure of who to vote for, up five percentage points from the last poll.