It was a different story in the South Island with a mainly fine day in store for most, save a few showers in the far south.
Ms Flynn said Christchurch and Dunedin would enjoy a brisk but fine 16C day.
Earlier, MetService lifted a thunderstorm watch that it had issued this morning for northern regions of the North Island. The warning covered Auckland, Coromandel Peninsula, Waikato and Bay of Plenty.
Duty forecaster Claire Flynn said heavy showers were now over the Coromandel Peninsula but lightning activity had stopped.