"Most folk who have gone away for the weekend will get summer-like conditions," WeatherWatch analyst Philip Duncan said. "There may be occasional showers in the North Island but they shouldn't spoil anyone's camping trip."
Higher air pressure has kicked away heavy rain clouds and temperatures will be in the mid-to-upper 20s across most of the North Island until Tuesday.
Wellington will be cooler at around 20C and a cold front will hit the lower South Island from tomorrow.
"It is a bit more refreshing in the evenings across the top of the country but that is always welcome after a hot day," Duncan said.
Temperatures will reach the late 20s in parts of the Waikato and Northland tomorrow, and drizzle is expected in Canterbury as the cold front works its way north.
Meanwhile, the long-weekend road toll last night stood at three, all from crashes on Friday.
Twenty-three people have been injured in non-fatal crashes, including six motorcyclists after an incident during a pack ride through the Manawatu yesterday.