Mr Best said temperatures would reach a high of 17 degrees on Saturday and an overnight low of nine degrees.
"It is not looking good for Sunday," Mr Best said. "There will be periods of rain and strong, possibly gale north westerlies for the whole of the area."
He said temperatures would be slightly lower than Saturday because of the strong winds at a high of 14 degrees and an overnight low of nine degrees.
But Sunday's strong winds would die down by Monday and the weather looked to improve on Tuesday and Wednesday with a 17 degree high for both days, Mr Best said.
Yet more wet weather was forecast for other parts of the country in the coming days as, what meteorologist called, a tumultuous spring continued.
MetService predicted western areas of the country would receive the bulk of the rain, as weather systems arrive from the Tasman Sea.
A new weather system was expected to muscle its way onto New Zealand on Friday. A period of rain or showers was forecast for the south and west of the country, while eastern areas should remain mostly dry and warm with blustery northwesterly winds.
MetService Meteorologist Peter Little said it will be a showery start to the school holidays for most. But as a narrow ridge of high pressure moved onshore many places should receive long periods of sunshine during the afternoon.
"Make the most of this fine weather, as another weather system will usher in rain and wind across much of NZ on Sunday", Mr Little said.
Once again it was folk in the west that will need coats and gumboots handy on Sunday, as a strong west to southwest flow becomes established over the country.
"Westerly gales are likely in exposed parts of NZ on Sunday, and these strong winds will make for trying conditions on the final day of the NZ Women's' Open at Windross Farm Golf Course in Auckland", Mr Little said.
For up-to-date information on severe weather around the country, or any other forecasts, see metservice.com
