Llandanwg Beach is to the south of Harlech. It consists of coarse sand backed by dunes with some pebbles with rocks to the north. It is usually possible to walk to nearby Harlech beach along the shore from here. The dunes are an SSSI and are fenced off and access is prohibited. Behind the southern end of the beach is a sandy harbour, protected by a concrete breakwater.
Llandanwg rail station is about 400 yards away and parking is at a P&D car park with some free roadside parking available just outside of this. The car park has toilets (drinking water available) and a cafe selling sandwiches, teas and ice-creams. Access to the beach is along a short tarmac path. Dog restrictions are in operation to the left of the main access for a distance of about 300 yards between April 1st and September 30th. It's generally safe for swimming, but rip currents can occur in surf conditions.
Adjacent to the car park is the small St Tanwg's church, which seems in danger of being engulfed by the dunes. Also nearby is the National Trust Y Maes nature reserve which is home to the rare Sharp Rush - named because its leaves end in a sharp point.