Drivers are being warned to take extra care travelling on roads in the Buller District due to flooding.
Waka Kotahi said there various speed restrictions on State Highway 67 between Birchfield and Granity.
MetService has an orange heavy rain warning in place for Buller until 6pm.
A warning is also in place for Westland about and north of Franz Josef Glacier until 4pm.
There are heavy rain watches for parts of the Canterbury High Country and Tasman, as well as the Nelson Lakes and the Tararua Range.