Support for the Maori Party has surged in a poll, while support for New Zealand First has fallen.

READ MORE: Maori Party says it would jump sides if Labour changes govt

Support for the Maori Party rose three points to 4 per cent in the the latest Colmar Brunton poll for One News.

It's the Maori party's highest result since 2008 in the opinion of those who responded.

National is unchanged on 46 per cent, Labour stays on 30 per cent as do the Greens on 11 per cent.

NZ First is down three points to 8 per cent.

As for preferred Prime Minister, Bill English is on 26 per cent - a drop of 5 per cent since the previous polling in February, and well below John Key's rating of 36 per cent in November.

Next most popular are Winston Peters and Jacinda Ardern on 9 per cent, with Ardern climbing 5 percentage points since being made Labour's deputy leader in March.

Little is steady on 7 per cent.

The poll is the second since Ardern was made deputy leader and the second to have her ahead of Little as preferred Prime Minister