The first public holiday of the year is likely to be fine with light winds and a high temperature of 26C in Whanganui.
MetService meteorologist Dan Corrigan said there would be "classic summery" conditions throughout most of the weekend.
"A high-pressure system is keeping any strong winds at bay," he said.
"Whanganui will not have any of the strong westerlies that sometimes characterise summer days in the region.
"It should be a great weekend for getting out and about and enjoying water activities."