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Llanddwyn Lighthouse

A Grade II Listed Building in Rhosyr, Isle of Anglesey

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Latitude: 53.1352 / 53°8'6"N

Longitude: -4.4155 / 4°24'55"W

OS Eastings: 238504

OS Northings: 362508

OS Grid: SH385625

Mapcode National: GBR 5B.6FVY

Mapcode Global: WH43C.4GMB

Entry Name: Llanddwyn Lighthouse

Listing Date: 29 March 1996

Last Amended: 19 October 1998

Grade: II

Source: Cadw

Source ID: 18036

Building Class: Maritime

Location: In an elevated position at the SW extremity of Llanddwyn Island.

County: Isle of Anglesey

Community: Rhosyr

Community: Rhosyr

Locality: Llanddwyn Island

Traditional County: Anglesey

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The site marks the W entrance to Menai Strait, and a light was first exhibited here in 1846. The tower itself however is probably a construction of the early C19 (documentary sources suggest a date of between 1800 and 1823) which served originally as a day-mark, and was then adapted for use as a lighthouse with the construction of a lean-to lantern room. The lighthouse was maintained as a local light by a private trust and was used until the 1970s. Restoration in progress.


The circular tower is lime-washed render over rubble, with renewed shallow conical slate roof. 4-stage tower with doorway in N side flanked by small windows, and a single window on each of two floors above it, the window detail renewed. Lean-to lantern room on S side, with large windows overlooking the sea. The tower is enclosed by low rubble walls, which also form the parapets for the inclined access to its elevated rock-site.

Reasons for Listing

A good surviving example of an early C19 day-mark, adapted for later use as a lighthouse and part of a group with the lighthouse keepers' and pilots cottages nearby.

Other nearby listed buildings

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