The circular lighthouse is made of cast iron and is 33 meters in circumference. It is painted white to stand out against the green backdrop of the mountain. The focal plane of the light is 41 meters above high water so as to be visible below dense mist, flashing four times per 30 seconds.
The lighthouse was established as the result of a commission appointed in 1906 by the Governor of the Cape of Good Hope, His Excellency, the Honorable Sir Francis Hely-Hutchinson, but was commissioned in 1919 only. It became fully automated in 1979. From an original three-man station it has been manned by a Senior Lightkeeper since then.
The Slangkop lighthouse draws its power from the Cape Municipality and has a standby diesel alternator that takes over in the event of a break in the mains supply.
Monday to Friday 10.00 am to 3.00 pm, with a half-hour break between 12.00 and 12.30 pm.
Closed over weekends and public holidays