A large high pressure system is approaching from the Tasman Sea, while a ridge stretches out over the North Island on Tuesday.

A west to northwesterly airflow lies over the South Island and the lower tip of the North Island, meaning it’s looking cloudy on the west of the North Island, with the low risk of a shower or two out there.
The East Coast, meanwhile, is mainly sunny, with northwesterlies.

For the South Island it’s a similar story, mostly cloudy in the west, with showers about Fiordland which push north in the evening, as rain moves northwards along the coast overnight.
The East Coast of the South Island, meanwhile, is mainly sunny – although we can expect some high cloud later in the day.
Some rain showers move into Southland, then Otago overnight – along with a southwest change.

– Aaron Wilkinson & Drew Chappell, WeatherWatch.co.nz