The River Caul Bourne is a river on the Isle of Wight, England.
The river is about 8 kilometres (5.0 mi) long. Its source is near Winkle Street in Calbourne, from which it runs to the north through Newbridge and Shalfleet. It is joined by several tributaries before flowing into to the Solent via Newtown estuary, a Site of Special Scientific Interest.