Located near the tip of the Llŷn peninsula, Aberdaron's sandy bay is about 1¼ miles long. The shore is backed by banks of boulder clay, with a concrete sea wall protecting the village. The headland of Trwyn y Penrhyn shelters the bay from the east. The sand tends to be coarse at the top of the beach, becoming finer lower down. It's good for pebble collecting, likely finds being white quartz, purple sandstones, grey-green diorite and black siltstone. The beach looks out towards the islands of Ynys Gwylan-fawr and Ynys Gwylan-bâch. Two streams - Afon Cyllyfelin and Afon Daron - flow onto the beach after merging in the village.
Parking is at an attended / P&D car park in the village, and facilities include (seasonal) toilets ♿, cycle parking, picnic tables, a First Aid post, ice-cream / beach shops and two pubs. Access to the shore is down a slipway. Some free parking spaces can be found at the top of the hill leading west out of the village, from where access to thee beach is down a steep track leading to a broken slipway. Dog restrictions apply on about 150 yards of the shore near the village, from 1st April to 30th September.
Popular activities include swimming, windsurfing, kayaking and surfing. The surf here can be a bit messy and there are some lone rocks on the beach to be aware of, but towards high tide is the best time to aim for. It's a good beach for beginners and is less busy than other local surf beaches.
The western end of Aberdaron Bay is known as Porth Simdde, and becomes a small cove for about 2 hours either side of high tide. During this period it can be accessed from the coastal path which drops down to near beach level.