Portencross Castle

Portencross Castle is a three-story stone tower on the coast of Ayrshire that stands on a rocky promontory overlooking the Firth of Clyde. The structure features a vaulted ground floor and multiple entrances positioned to control access from different directions.

The castle was built around 1360 by Robert Boyd and served as an important administrative center where King Robert II signed numerous royal documents between 1371 and 1390. This role made it a seat of regional power and authority during the late medieval period.

The castle holds exhibits of local archaeological discoveries, including artifacts from a Spanish Armada shipwreck and the silver-gold Hunterston Brooch from around 700 AD. Visitors can trace how this place mattered to the wider region through the objects preserved within its walls.

The castle opens to visitors from Easter through September, but only on weekends, bank holidays, and during school holidays. It is best to check ahead to confirm the exact dates it will be open, as the calendar varies each year.

After a severe storm in 1739 destroyed the roof, local fishermen continued to use the castle and made repairs to adapt it to their needs. This unexpected second life shows how the building became home and workspace for working people rather than nobles.

Location: North Ayrshire

Website: http://portencrosscastle.org.uk

GPS coordinates: 55.69940,-4.90495

Latest update: December 8, 2025 21:02