Heavier showers are possible along the Canterbury coast in the afternoon, becoming confined to Southland and Clutha this evening.
Fine weather is expected across the country by tonight.
“Temperatures are about average over the country this weekend, but the south of the South Island has forecast highs of 4C below average today, e.g Wanaka 15C, Queenstown 14C, and Invercargill 12C,” Bellam said.
On Sunday, the North Island should experience mainly fine weather, with isolated showers in the afternoon and evening in Northland, MetService said.
Frost is possible for Southland, Otago, and Canterbury on Sunday morning as temperatures drop to low single digits.
“A cool start for Alexandra and Queenstown on Sunday morning, with a low of 2C, 5C below average, forecast in both towns,” Bellam said.
Along the East Coast of the South Island, northeasterly winds will be brisk.
Rain is forecast to return to parts of the North Island on Monday, with isolated showers in the north and west.
In the South Island, temperatures in Canterbury may rise to the mid-20s on Monday. Winds pick up by the end of the day ahead of this next weather system.
On Tuesday, MetService said rain is expected to return across the country.
The North Island is forecast to be partly cloudy with isolated showers, with heavy rain developing for the Bay of Plenty later in the day
Rain with heavy falls in the west of the South Island is expected on Tuesday, and occasional rain will develop in the south.