National Party leader Simon Bridges says a lack of action from the current government is the reason for the latest political poll.

The latest Newshub-Reid research poll shows National's popularity has increased by 6.5 percent to 43.9 per cent – the highest of all the political parties.

The Labour Party's public support is now at 41.6 percent - a 9.2 percent drop since the last poll in June.

'It's really good to see from a National perspective that we're up. It shows a drop for the Labour party and the Prime Minister.”

'Ultimately it's about a sense around New Zealand that the government's not up to much, they're not delivering on things,” says the Tauranga MP.

He says in Tauranga specifically, there has been a lack of housing development and investment in road infrastructure.

'There's been a lot going on in the past but nothing new is happening, likewise in transport and roading. We need projects like the Tauranga Northern link, like an underpass at the Bayfair to Bay Park project.

'The only thing happening in Tauranga at the moment is something that the last National government, when I was transport minister, started.

'All of these things and the economy weakening, tax and cost, housing, transport and a lack of action is what's behind this current poll.”

Labour's coalition partners New Zealand First is up to 4 per cent and the Greens saw a minor increase, putting them at 6.3 per cent.

It's not just the Labour Party that's lost popularity, Jacinda Ardern's public support as most preferred prime minister dropped to 38.4 percent.

It still completely shadows National leader Simon who is at 6.7 per cent, closely followed by National's Judith Collins at 5.2 per cent.

The poll has a margin of error of plus or minus 3.1 per cent.

-Additional reporting by RNZ.