High Tide is a castle situated on Driftmark. It serves as the seat of House Velaryon.

Having accumulated numerous treasures from Essos, the Sea Snake, Lord Corlys Velaryon constructed High Tide to replace the damp and crowded ancestral Velaryon seat, Castle Driftmark, and to house the Driftwood Throne. Spicetown developed from a fishing village near High Tide.

High Tide is built from pale stone, the same material used in the Eyrie. Its slender towers are crowned with roofs of beaten silver which shine in the sun. When the waters of Blackwater Bay are at high tide, the castle is connected to the island of Driftmark by only a causeway.

The Hall of Nine is the main hall of High Tide, housing the Driftwood Throne. It is also used to display the many treasures acquired on Corlys Velaryon's nine voyages, among other exploits such as the War for the Stepstones.