But even with a surge like this, Mr Peters is pretending he's not excited.

"Well it's your poll and you know what I think about your polls," he told Newshub.

This is a particularly big result for the potential kingmaker, given New Zealand First traditionally peaks as it gets closer to Election Day.

At the same point before the 2014 election, New Zealand First was polling just 3.6 percent. It climbed another 5.1 percent by Election Day to get 8.7 percent as a final result and 11 seats in Parliament.

If it rises by the same amount this time around, New Zealand First would get a final result of 13.9 percent and allow it to bring in more than 16 MPs.

Newshub.