Heavy rain and strong gales will hit parts of the South Island on Sunday.
A heavy rain warning has been issued by MetService for Westland, south of Otira on the west coast, with 200-250mm expected to fall in the range and 80-100mm near the coast off Ross.
A spokesperson for MetService said there could be brief but heavy periods of rain where between 25 and 35 mm could fall per hour at the beaches.
The spokesperson said the rain could cause streams and rivers to rise rapidly and flooding and landslides could also occur.
* Weather: West Coast SH6, near Harihari, closed due to flooding
* Gales and heavy rain for much of New Zealand this weekend, Antarctic blast to bring snow to low levels in the south
* Heavy rain and strong gales batter parts of the South Island as the front moves up the country
People traveling in the area have been warned that driving conditions could be dangerous.
Upper Canterbury and south of Arthur’s Pass are expected to receive 180-230mm of rain between 9am Sunday and 12pm Monday and 90-130mm could fall east of the divide.
The rain was expected to ease south of Bruce Bay late Sunday afternoon.
Meanwhile, the Canterbury High Country is expected to be buffeted by strong north-westerly gales which will subside later on Sunday evening.
And while heavy rain could fall in Buller on Monday, the rest of the South Island is expected to have light showers which will ease on Tuesday.
In February, parts of the west coast were hit by torrential rains, which caused widespread flooding and damage to homes and roads.