Chuí Lighthouse, Lighthouse in Barra do Chuí, Brazil.

Chuí Lighthouse is a tapering concrete tower 30 metres tall, painted in alternating red and white horizontal bands, standing on a grassy field at the mouth of the Chuí stream. A white octagonal gallery deck with railing sits below the red lantern room, which is topped by a glass-panelled lantern and a white domed roof. Four single-storey buildings stand next to the tower, and a small door opens at its base.

The first lighthouse, lit on 24 May 1910, was a red metal skeletal tower built under Alfred Kurt Schultze, with a fourth-order Fresnel lens by Barbier, Benard et Turenne giving an 18-nautical-mile range. Corrosion led to a concrete tower in 1934, abandoned for unstable foundations. The current 30-metre concrete tower dates from 1941.

The lighthouse takes its name from the Arroio Chuí, the stream whose mouth it marks, and stands opposite the Uruguayan resort of Barra del Chuy. It is run by the Brazilian Navy and carries the code BR-4660, one of four lighthouses spaced along 230 km of coast between Rio Grande and this point.

The lighthouse emits two white flashes every 25 seconds, with its beam reaching 46 nautical miles across the South Atlantic waters. Visitors should expect windy conditions and wear sturdy footwear when accessing the base of the structure.

The first light, lit on 24 May 1910, was a red metal skeletal tower supervised by Alfred Kurt Schultze, fitted with a fourth-order Fresnel lens by Barbier, Benard et Turenne giving a white and red light of 18 nautical miles. A concrete tower was begun in 1934 but abandoned when its foundation proved unstable; the present tower dates from 1941.