Carrickfergus Castle
A Norman castle on a basalt outcrop in Belfast Lough, in military use for some seven and a half centuries, until 1928, before becoming a monument.
Updated 20 October 2026

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John de Courcy began the castle around 1177 on a rock projecting into Belfast Lough, and it is among the best-preserved Norman castles in Ireland, with a four-storey keep about twenty-seven metres high and a curtain wall following the shape of the rock. It stayed in military use until 1928, some seven and a half centuries, garrisoned and adapted through successive periods, with gun ports cut for cannon in the sixteenth century and further alterations into the twentieth, before passing into state care as a monument. The keep contains a great hall and a well cut through the rock. Figures in period dress are set through the rooms to show their use. The castle sits directly in the town, with the harbour alongside and the lough traffic passing.
What to look for
- The keep - a four-storey Norman tower about twenty-seven metres high.
- The rock-following curtain - walls built to the outline of the basalt outcrop.
- The gun ports - sixteenth-century adaptations for artillery in older walls.
- The lough setting - the castle standing out into the water beside the harbour.
When to go
April to October for full opening; winter hours are reduced. The site is exposed to wind off the lough. Weekday mornings are quiet, with school groups common in term time.
Things to know
The keep involves steep spiral stairs with no lift. Interiors are sparse, with mannequins doing most of the interpretation. The surrounding town is ordinary and the castle is a short visit.
Nearby
Belfast is fifteen minutes by train; the Antrim coast road begins north of the town.
Key facts
Source: Wikidata, item Q2368960, read on 18 October 2026.
What to pack for Carrickfergus Castle
Chosen from what this place is for. Tap a kit for the full checklist.
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- A slim anti-theft daypack - Zips that close properly; keep it in front in crowds and on transit. Find on Amazon
- A refillable water bottle - Many cities have public fountains; save money and plastic. Find on Amazon
- A light layer + compact umbrella - For museum air-con and a sudden shower. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.





