Overview
The round tower on Scattery Island (Irish: Inis Cathaigh) is one of the few in Ireland you can enter at ground level – most were built with a raised doorway for defence. It stands 26m high and is visible from the boat the moment you round the point. The island lies 2.5km off Kilrush in County Clare, at the mouth of the Shannon Estuary, and has no cars, no shop and nobody living on it. Entry is free. You pay only for the ferry, which includes return passage and an OPW guide who walks you round the ruins.
History
The monastery (c. 535–540 AD)
Saint Senán, a West Clare man, founded a monastery here between 535 and 540 AD. It grew into a church centre that reached across parts of Clare, Limerick and Kerry. What survives is unusually complete for an early site: an oratory, St Senán’s Well, the round tower, and the Cathedral of Saints Mary and Senán, a church later enlarged under the patronage of Brian Boru.
Vikings, then Brian Boru
The first Viking raid came in 815 AD. By the mid-10th century the Norse had a settlement on the island and were using it to watch traffic on the Shannon. Brian Boru took it back in 977 AD, defeating the Norse king of Limerick. After the Synod of Ráth Breasail in 1111 the island held its own diocese, later folded into the Diocese of Killaloe.
The pilots
From the early 1800s the island was home to Shannon pilots and their families, who steered ships through the estuary. There was a street of stone cottages, a post office and a school, and the population peaked at 139 in 1861. The last permanent residents left in 1969. Their cottages, known as the Street, still stand empty in the layout of the old village.
Battery and lighthouse
During the Napoleonic Wars the British built a semi-circular artillery battery on the southern tip, with six 24-pounder guns and a dry moat, in case the French came up the estuary. It is one of six such fortifications along the Shannon. A stone lighthouse followed in 1872; it is automated now, but the tower and keeper’s cottage remain.
The state took the island in 1991. The OPW maintains the ruins, the lighthouse and a visitor centre, and the island is a Special Area of Conservation and Special Protection Area for birds.
What to see
| Feature | Notes |
|---|---|
| Round tower | 26m, ground-floor doorway, visible from the landing. |
| Cathedral of Saints Mary and Senán | Antae, carved stonework and a bishop’s head above the east window. |
| St Senán’s Well | Old pilgrimage site on the western shore. |
| Teampall na Marbh (Church of the Dead) | 15th-century red sandstone church, used as the parish graveyard. |
| The battery | Napoleonic gun emplacement on the southern tip, with interpretive panels. |
| The Street | Empty 19th-century pilot cottages. |
If your time is short, the round tower and cathedral are the pair to see, and they sit close together a few minutes from the landing. The pilots’ street takes longer to reach and rewards anyone curious about how 139 people lived on a rock in the estuary.
Birdlife is part of the draw: breeding ravens and kestrels, protected hen harriers, and migratory waders along the shore and pastures. Tradition places Saint Senán’s own grave in the monastic graveyard.
Practical information
- Getting there: ferries run from Kilrush Marina, a crossing of roughly 30 minutes. Book ahead with Scattery Island Tours. There is parking at the marina.
- Opening: daily, May to September. Sailing times shift with the tide, so check before you travel.
- Admission: the island is free; you pay the ferry fare.
- Facilities: a visitor centre with toilets. No shop and nowhere to buy food or water, so bring your own.
- Accessibility: grassy paths, uneven ground and steps. Not suitable for wheelchair users beyond the visitor centre.
- Bring: windproof clothing, walking shoes, water, a picnic.
Nearby
- Vandeleur Walled Garden – just outside Kilrush, with woodland walks, a restored garden and a café.
- Carrigaholt Castle – a 15th-century MacMahon tower house out on the Loop Head Peninsula, about 15 minutes’ drive west.
- Kilkee Cliffs – coastal walks roughly 15 minutes north of Kilrush.
One caveat: everything here depends on the tide and the weather, and the OPW season is short. Sailings can be cancelled at short notice, so a fine forecast is worth waiting for rather than gambling a half-day on a marginal one.