Cape St. Blaize Lighthouse, lighthouse in Mossel Bay, South Africa

Cape St. Blaize Lighthouse is a circular tower of cast iron, painted white, standing near Mossel Bay on South Africa's Cape south coast. It was first lit on 15 March 1864.

The tower was built in 1864 to address the dangers ships faced along this stretch of South African coast, becoming a critical safety landmark for maritime traffic. Its construction reflected expanding sea trade and the urgent need to mark hazardous waters that caused many shipwrecks.

The lighthouse is named after Saint Blaise, patron saint of the nearby Cape St. Blaize, and its light has guided fishing boats and coastal traffic into Mossel Bay since 1864. The tower stands on a 33-metre cliff above the Atlantic, a spot where visitors today watch for southern right whales during their annual migration.

The tower is open for visitors to climb the interior stairs, with certain periods and days having restricted access depending on maintenance and weather conditions. Sturdy footwear is recommended since the climb is steep and wind exposure at the top can be quite strong.

A human keeper lived on-site for many decades, maintaining a constant watch over the light and performing essential daily duties at the tower. This traditional role has been gradually replaced by automation, though some operational checks still require human attention.