Quonochontaug Breachway is a gut located in Washington County, Rhode Island. It appears on the Quonochontaug USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately -6.89 feet (-2.10 m) above sea level. The nearest populated place is Quonochontaug Beach (historical), approximately 0.3 miles to the W.