2002 marked the centenary of this most important navigation aid to shipping.

The first light at Point Lonsdale, of low power and limited visibility, operated from 1863. The second light elevated on a timber structure, operated from 1867 until March 1902 when the existing light came into service.

The light is 37 metres above sea-level atop a circular concrete tower. The light-keeper's communications room was constructed around the tower base in 1950.

The light has red and white sectors displaying a group of two long flashes every 15 seconds. It was originally powered by kerosine and was converted to electricity in the mid-1930s. In case of mains power failure it has an emergency power system. This was originally gas sourced but is now battery powered.

The navigation of the entrance channels at Port Phillip Heads can be difficult for shipping and the Point Lonsdale lighthouse continues to provide an essential landfall and entrance light to mariners. This facility remains one of the few coastal lights staffed on a 24-hour basis.