Niwa National Climate Centre principal scientist Brett Mullen said the centre was 75 to 80 per cent sure last year's La Nina pattern would not be repeated.
Instead, it will be an El Nino summer.
That was good news for those left feeling cheated after last summer's dreary offering, Mullen said.
The southwesterly winds more common during an El Nino summer brought with them more settled, drier weather.
"It is looking like a better summer than last year, especially in Northland, Auckland, Waikato and the Bay of Plenty.
"It could be quite nice."
But Wellingtonians were likely to suffer a more windy summer, while wind could also prove troublesome for farmers on the East Coast as the dry conditions combine with the wind to suck moisture out of the ground, he said.
The wind would also mean colder temperatures, except in the east as it was not really affected by the southwesterly winds.