A large search is underway for a woman who has been missing from North Canterbury since yesterday.

Police say Melissa Dalgety, also known as Melissa Gray, has not been seen since Thursday morning and they have serious concerns for her safety.

The Rangiora woman's car was found at Waikuku Beach carpark late yesterday.

Senior Constable Paul Beaver said 28 searchers from the Police SAR squad, Christchurch and Oxford LandSAR groups, including two search dogs, have been out searching the forest, beach and properties of Waikuku Beach in very cold and wet conditions today.

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Five members of Waikuku Surf Life Saving have also conducted a search of the shoreline and the estuary of the Ashley River. The search will continue tomorrow.

Anyone with information or possible sightings are asked to phone 111 immediately.