The Skerries Islands are a group of three small uninhabited islands situated between 0.5 km and 1.5 km off the Fingal Dublin coast. The islands are protected by the Skerries Islands SPA because of their ornithological importance for both breeding seabirds and wintering waterfowl.
St Patrick’s Island is so called because he is said to have founded a monastery here, which flourished until the Vikings raided. In 1220 the Archbishop of Dublin issued a directive to move the Monastery to the mainland as the island was found to be too inconvenient.
Shenicks Island is the most southerly of the Skerries Islands, has a Martello tower that has a visible link between the Towers on Red Island and Drumanagh. Since 1987 the island has become a wildlife reserve.
Red Island, despite its name, is no longer an island. Now it is a rocky headland connected to the mainland by a roadway (isthmus), which forms part of the quay wall of the harbour. A Martello Tower stands on the island. Colt Island is a small island off Red Island.