"However, if southwesterly winds start to appear at this time, beach lovers might not be so happy as this would make things a little bit cooler on the east coast even if it is drier."
Mullan expected that the worst of the unusually heavy rain that caused chaos around the country this week was over.
"The ongoing winter weather will be a different sort of crazy from what we have been getting recently. But there should be nothing too drastic on the way until September," he said.
The warmer, drier slide into spring predicted in the eastern regions was good news for winegrowers in the area.
It would create ideal conditions for producing bumper crops of grapes, Hawke's Bay Winegrowers' Association chairman Nicholas Buck said.
"There would be a good crop of vines that would see a reasonable result come harvest time in early 2013. But although there would be a better than average yield, that's not to say there would be an associated increase in quality.
"You also have to watch it doesn't stay too dry for too long and it leads to a spring drought, which inhibits the production of green shoots in the vines," he said.
According to Niwa, Auckland will experience a normal winter, with average temperatures and normal rainfall levels.
But Mullan forecast southwesterly winds arriving next month could affect surfing at the city's popular west coast beaches.
Phil Wallis, founder of Piha Surf School, said a south-westerly was "a surfer's biggest enemy".
"It makes for poor conditions out on the water," Wallis said. "But we have had a couple of extremely good seasons so I would expect it to turn rotten at some point."
