Church Bay - Porth Swtan is a sandy beach located by Church Bay, a mile and a half north-west of the village of Llanfaethlu, Anglesey.
Porth Swtan is a rural, unspoilt sand and pebble beach edged with rock pools. The beach is backed by cliffs and access is via a steep footpath from the village. Swimming, sailing, fishing and surfing are all popular activities here. The Anglesey Coastal Path runs along the cliff tops.
In Church Bay, most of the properties are holiday homes for rent, with a cafe and a small museum located in a preserved 17th-century thatched cottage.
Porth Swtan, is named after the River Swtan, a small stream which reaches the sea below Port Whiting. It is thought that Swtan may be the name of the swtan sea-white fish.
Church Bay, is the name used by sailors in the 19th Century, the Church known as St Rhuddlad's, forming a visible landmark. The name is given to the larger bay but that has caused the loss of the names of many of the smaller coves dotted around the bay.