Nukuhou saltmarsh is a low-lying area located where the Nukuhou River enters Ohiwa Harbour. The tidal flow from Ohiwa Harbour brings in the salty water, going some way upstream at high tide, and forming a marshy area with a special flora and fauna. The saltmarsh is located adjacent to Wainui Road, between Ohope and Ohiwa, at Cheddar Valley. A lookout and a walkway alongside the road has been formed and is maintained by the Nukuhou Saltmarsh Care Group. Extensive predator control, mainly of rats and stoats, is also performed by the group, to allow other species to survive or flourish.
There is a small parking area by the junction of Wainui Road and Burke Road, providing easy access to the boardwalk leading to the lookout. The track directly off Wainui Road to the lookout is wheelchair-friendly, but the remainder of the walking tracks are not. There are no toilets near the track.