It's likely to be a damp end to the week for people living in the capital, the top of the South Island, and parts of Wairarapa and Hawke's Bay.
MetService says Hawke's Bay - mainly around the coast - and Wairoa could get heavy rain, approaching warning criteria, from 6pm Sunday. It's expected to last until late Monday night.
People living in the southern Wairarapa and the eastern hills of Wellington could see thunderstorms Sunday morning.
WeatherWatch says a "few showers" are possible across the rest of the North Island.
The heaviest rain though is expected in eastern Marlborough and Kaikoura, where a heavy rain warning is in force. Thunderstorms are possible, though it's expected to ease overnight.
Further south, summer is hanging on.
"Coastal breezes for many and calm through central Otago," WeatherWatch says. "Sunniest on the West Coast, Otago and parts of Southland."