Mumbles Lighthouse

An octagonal lighthouse of coursed rubble stone painted white. The tower is stepped and double-skinned, as the inner tower rises to a greater height than the outer. The outer tower is 8.5m high and slightly stepped to form 3 stages. An arched doorway with plaque over it inscribed ''MDCCXCIII Wm Jernegan arch''. At the top of the outer tower is a projecting platform with bellied cast-iron rails, originally to accommodate a fire-basket. The inner tower rises a further 6m and terminates in a cast-iron octagonal lantern with lattice glazing. This lantern is a recent replacement. A projecting cast-iron gallery with a bellied rail was cast at Neath Abbey Foundry in 1798. The lighthouse is enclosed on 3 sides by a battery.

The narrow inner tower has a staircase with cast iron hand rail in the upper stage only, giving access to interior of the lantern. The lower stage has an open central well originally used in the haulage of coal to the 2 lanterns. The main staircase leading to the lower platform occupies the vaulted space between the outer and inner towers; the roof over the exposed section of this staircase as it continues above the middle gallery is recent.