Tonfanau (pronounced 'Tonn van eye') is a very quiet beach of sand and rocks, backed by shingle with the Afon Dysynni emerging onto the beach. The beach is backed by banks of boulder clay with agricultural land behind. Northwards the shore is mostly rocks and shingle with a few low tide sandy areas.
Tonfanau rail station is approximately 400 yards from the beach. Parking is possible on the road here, which runs alongside the railway and is quite wide with very little traffic. A public footpath leads down to the beach passing the remains of an old army camp. As the area was once part of a firing range, any suspicious objects found should be left alone and reported to the police.
About 1¼ miles to the north is Ogof Owain, a small cave where Owain Glyndwr is said to have hidden from the English in the early 15th century.