The Bristol Channel (Welsh: Môr Hafren
, meaning 'Severn Sea') is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Severn (Welsh: Afon Hafren) to the North Atlantic Ocean. It takes its name from the English city of Bristol, and is over 30 miles (50 km) across at its widest point.
Long stretches of the coastline of the Bristol Channel, on both the South Wales and West Country sides, are designated as Heritage Coast, including Exmoor, Bideford Bay, the Hartland Point peninsula, Lundy Island, Glamorgan, Gower Peninsula, South Pembrokeshire and Caldey Island.