The release last night of the latest 1 News Colmar Brunton poll, conducted from September 16-19, saw National arrest a slide in the polls to rise six points to 46 per cent. Labour was down seven points to 37 per cent.
Although advance voting statistics are being collected, votes will not be counted until Saturday. Statistics are not available by electorate until after election day.
The 2014 election saw a 77.90 per cent turnout of enrolled voters.
Based on the growth of advance voting over the last two elections, as many as half of voters may vote before election day this year.
In 2014, 29.3 per cent of votes were cast in advance compared with 14.7 per cent in 2011.
To accommodate the growth, the Electoral Commission has looked to set up about 100 more advance voting places.
Voters who aren't already enrolled need to hurry and enrol by the end of tomorrow to be able to vote in the 2017 General Election.
"Election day is almost here and this is your last chance to enrol," says Alicia Wright, Chief Electoral Officer.
"It's not too late, but you need to do it right now. You can't enrol on election day, Saturday 23 September, so make sure you're enrolled by tomorrow."
More information about enrolling and voting, including a list of advance voting place locations, is available from www.elections.org.nz