Which channel separates Ireland from Wales at the narrowest crossing?

St George’s Channel separates Ireland from Wales at the narrowest crossing between the two islands.

The channel is part of the sea route between the Irish Sea and the Celtic Sea. It runs between southeastern Ireland and southwestern Wales, with major coastal cities and ferry ports on both sides. The name has been used for the waterway since at least the medieval period, although historical maps sometimes applied it to a broader area.

St George’s Channel is important for shipping and ferry services connecting Ireland with Britain. Its waters can be rough because the channel is exposed to Atlantic weather systems moving through the Celtic Sea and the Irish Sea. The route between Rosslare and Fishguard is one of the best-known crossings.

It should not be confused with the North Channel, which lies between Northern Ireland and Scotland, or the Bristol Channel, which lies between South Wales and southwest England. Those waterways are nearby but describe different parts of the British Isles’ coast.