A front curls its way over the North Island today while the South Island sits under a ridge of high pressure.

A low moves over the North Island on Tuesday while a ridge continues in the south.

Generally anticyclonic on Wednesday however a southerly airflow freshens about the eastern North Island later in the day.

Monday

Blue - As a front moves over the North Island today it will bring showers, some of which may be heavy, perhaps even the chance of a thunderstorm then easing mid-afternoon in the west and about the Bay Of Plenty later this evening.

A frosty start about inland parts of the South Island this morning, temperatures have reached -5 degrees celsius this morning about Tekapo.

Tuesday

Blue - Showers about the east of the North Island may be heavy in the morning then easing from afternoon.

Another frosty start about the inner South Island, lows around 0 to -3 for most although it may drop to -5 about isolated inland spots.

Wednesday

Blue - Overnight or perhaps more towards dawn on Thursday a freshening southerly airflow may bring a few heavy showers to the North Island's east coast, mainly about northern Hawkes Bay/Gisborne.

A frosty start about the inner South Island, lows around 0 to -3 for most although it may drop to -5 about isolated inland spots.