|Main source||Aorangi Range|
|River mouth||Cook Strait|
|Length||13 km (8 mi)|
The Whawanui River is a river of the Wellington Region of New Zealand's North Island. It flows south from the Aorangi Range to reach Cook Strait 10 kilometres (6 mi) northeast of Cape Palliser. It is one of the southernmost rivers in the North Island.
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