The stormy weather caused rivers to rise and breach their banks. Floodwaters damaged homes, roads and farmland and number of people were forced to evacuate their homes.
Aerial photos show lakes of water across farmland, and rivers flowing through town streets.
Here are some of the best photos from over the weekend:
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Aerial image showing the extent of the flooding in the Marlborough region, photographed from an Air NZ flight inbound to Blenheim on Sunday morning.A truck drives through floodwater on Chaytors Road, in Marlborough.Soldiers assisted with the evacuation of more than 800 properties and 2000 residents in the Buller District over the weekend.Barney Simmiss pictured in his kitchen after returning to his ruined home on Derby Street in Westport.Barney Simmiss, left, and Graeme Gallagher outside their flooded house on Derby Street in Westport.Creeks and rivers swelled in the Marlborough area over the course of the weekend.Submerged farmland on the edge of Westport after floodwaters inundated the area on the weekend.Flooded farmland in Marlborough on Monday.Takarau Gorge Rd, which is in the Wellington region, was badly damaged after flash floods.Floodwater covers land throughout Westport, on the South Island's West Coast, after heavy rain.A kayaker makes his way down Menzies Street in Westport.Heavy rain has caused widespread flooding in the Marlborough area.