The castle was constructed to guard the harbor against the O'Sullivan Beare clan and various sea-based raiders.
It is locally referred to as 'McCarthy's Castle' due to the lineage of its founders.
The structure sits on a sandy spit, meaning access is restricted or impossible during peak high tides.
The castle overlooks the ruins of the Ballinskelligs Priory, which was home to Augustinian monks who moved from Skellig Michael around the 13th century.
The building features defensive 'murder holes' above the entrance to protect against forced entry.
Geological erosion has significantly reduced the surrounding sand spit over the last century.
It is one of the few remaining coastal fortifications in the Iveragh Peninsula that retains significant portions of its original vertical masonry.
Ballinskelligs Castle is a 16th-century tower house located on the southern shore of Ballinskelligs Bay in County Kerry. It was built by the MacCarthy Mór dynasty to protect the bay and nearby monastic sites from pirates and invaders. The structure consists of a rugged stone tower situated on a narrow spit of land that is often surrounded by high tide. It served as a strategic defensive point overlooking the route to the Skellig Islands. The ruins are characterized by thick limestone masonry and remnants of a vaulted ground floor. Its location marks the landing area where monks from Skellig Michael eventually relocated to the mainland. The site remains accessible as an unstaffed outdoor historical ruin.
From the beach at low tide, looking up at the castle with the Skellig Islands visible in the distant background.
Check local tide tables before visiting to ensure the sandy causeway is not submerged.
Wear waterproof footwear as the surrounding area is often soft sand or tidal mud.
Combine your visit with the adjacent Ballinskelligs Priory ruins for a more comprehensive historical context.
Do not attempt to walk to the castle if the tide is rising or the water has already covered the sand spit.
Avoid climbing on the walls to preserve the structure; treat the site as a protected historical monument.
