This lighthouse, Australia's second tallest, was completed in 1862 and made from pink granite quarried from the island itself.

The focal plane of the light is situated at 55 metres (180 ft) above sea level, the characteristic is a group of three flashes that occurs every twenty seconds.

[3] Gabo Island has a moderate oceanic climate (Cfb) with mild summers and cool winters and rainfall spread throughout the year.

Due to a strong foehn effect, the island registered a high of 32.1 °C on 19 September 2023.

[6] Concern of predation of native birds and animals led to a successful feral cat eradication program on the island between 1987 and 1991.