Shipbreaker Bay is a body of water located off the south-eastern coast of Westeros. It is an inlet of the Narrow Sea, running along the eastern coast of the Stormlands, separating the mainland from the island of Tarth. The bay is noted for its severe, frequent storms. House Baratheon's ancestral castle, Storm's End, is located on the bay.
In the books
In the A Song of Ice and Fire novels Shipbreaker Bay is named for the hundreds, if not thousands, of ships that have been wrecked in storms along its shores. Most notably, the parents of Robert, Stannis and Renly Baratheon were killed in a shipwreck close to Storm's End twenty years before the events of the series.