Severe frosts are forecast across parts of the North Island over the next couple of days.
Hawke's Bay can expect frosts for tomorrow morning before a northwesterly change moves in for the rest of the week.
Thursday is set to be fine with 18C predicted.
Friday and Saturday will herald the arrival of southerlies and rain, with temperatures falling to 15C.
Those conditions are set to stick around with showers and light winds forecast for the first day of winter on Sunday.