The Celtic folk duo Castlebay is returning to Charleston to perform its unique blend of Celtic musical heritage and Maine nautical traditions.

The Maine-based duo, Julia Lane and Fred Gosbee, will perform at 7 p.m. Saturday at Circular Congregational Church in downtown Charleston. Tickets are $20 at the door.

"They have a wide following of people and give concerts throughout the Eastern United States and in Great Britain," said Barbara Cole, a Circular member who helped to organize the duo's visit. "We are absolutely delighted that they wanted to return."

Castlebay performances feature storytelling and vocals alongside Celtic harp, guitar, fiddle and woodwinds. The duo, who performed at Circular last year as well, features songs with themes about living by the sea.

Castlebay has toured in the United States, Ireland, England and Scotland and has played at such events as the International Festival of the Sea in England and Scotland and the Edinburgh Folk Festival in Scotland.

They have presented workshops on maritime life and music to thousands of children and adults on both sides of the Atlantic.

They also have written, recorded and produced two albums, "Song of the Sea" and "The Ballad of Cappy John," among 27 recordings of original and traditional songs.

The Charleston concert is co-sponsored by the Celtic Spirituality groups at Circular and Charleston Folk, a local Celtic dance group.

For more, go to www. castlebay.net/home.html.

Reach Jennifer Hawes at 937-5563, follow her on Twitter at @JenBerryHawes or subscribe to her at facebook.com/jennifer.b.hawes.