Motorists are being asked to take care after reports of severe flooding been on SH1 at Kuku, between Ōhau and Ōtaki.
Metservice says rain in the region is expected to clear late this evening.
While the road remains open, with water rising a police spokesperson said there may be further delays or road closures.
Police are asking anyone on the roads to take extra caution and drive to the conditions.
Yesterday afternoon, around 25 properties were cut off due to a landslip on the Kāpiti Coast as wild weather continued to slam the Wellington region.