A summary of the full...
Take the A7 out of Belfast for Downpatrick, then take the A25 out of Downpatrick for Strangford (follow the signs for Strangford ferry). As you enter the village The Cuan is on your right-hand side ( Journey time - 50 min.approx).
Take the M1 motorway following for Belfast. When you are coming into Newry follow for Downpatrick, A25. The A25 goes through Downpatrick and on out to Strangford ( Journey time - 2 hours).
Sat Nav Coordinates
Latitude = 54.3710, Longitude = -5.5562