According to Retail NZ spokesman Greg Harford, the country's Christmas shopping seasons starts on September 25.
"People always think Christmas is coming earlier every year, but it's been the end of September, October for many years."
He said the main reason was to get people thinking about both Christmas and summer early. It would build up throughout November and reach its peak in December, he said.
"Christmas is often used by retailers in New Zealand as a bit of a proxy for summer.
"Customers who wait until December before they start thinking about what they are going to do for Christmas may miss out on what they are looking for."
He said 13 per cent of retailers put decorations up by the end of October. More than half of retailers would have decorations up before then end of November.
Nineteen per cent wouldn't put up decorations at all.
A spokesperson for Napier City Council said its decorations would be up a week before the Santa Parade on December 2.
The decorations would include three trees, wreaths and banners. The Emmerson St Flower Pot would also be getting a Christmas makeover, with lilies and tinsel.
People in Hastings will see their Christmas decorations at a similar time, Hastings business association acting manager Kelly Nolan said.
(Havelock North)- It's so early you get bored of it by the time Christmas comes
Esther Parsons (Havelock North) - I love Christmas decorations, I'd love to see much more of the nativity scenes, the true meaning of Christmas in the windows, and I'm fine with middle of November onwards Shalama Kawhe (Hastings) - 1st of December, being the Christmas month