Coldharbour is an area of the London Borough of Havering by the River Thames and southwest of the Rainham Marshes Nature Reserve.

The nearest accessible settlement on land is the town of Rainham, which is connected by Coldharbour Lane; the village of Wennington is also nearby but not accessible by road (both are separated by the A13 and marshlands).

The area around the point is mainly industrial land known as the Freightmaster Estate depot.

The London Loop passes through Coldharbour on its way east to Purfleet in Thurrock.

Coldharbour was an estate primarily in the ancient parish of Wennington.