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Diving the Cape Peninsula and False Bay : Stonehenge
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Diving the Cape Peninsula and False Bay/Stonehenge

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Back to [[Dive_sites_of_the_Cape_Peninsula_and_False_Bay|Dive sites of the Cape Peninsula and False Bay]]
Back to [[Dive_sites_of_the_Cape_Peninsula_and_False_Bay|Dive sites of the Cape Peninsula and False Bay]]

Revision as of 09:02, 31 August 2009

The dive site Stonehenge is a rocky reef in the Karbonkelberg headland area on the Atlantic seaboard of the Cape Peninsula, near Cape Town in the Western Cape province of South Africa. Information is provided which may assist in planning Recreational and Research Scuba diving at this site, and links to photographs of marine organisms that have been found there.

It is a good site for varied topography, biodiversity and depth variation.

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Map of the dive site Stonehenge.

Name "Stonehenge"

The area is named for a more or less circular ring of rocks which break the surface near the larger rock shown on the charts.


S34°02.838’ E018°18.316’ (Top of blinder)

South of Duiker Point, below Karbonkelberg

This site is in a Marine Protected Area (2009)


The site is only accessible by boat. It is about 6.5km from Hout Bay harbour.


The site is exposed to south westerly swells, so best when the south west swell component is low and short. This may occur after south easterly winds. The site is usually at it's best in summer, but there may also be occasional opportunities in autumn or early winter.

This is an area which sometimes has upwellings, caused by strong south easterly winds, resulting in cold clear water, and may then have a plankton bloom, which will reduce the visibility again.


Maximum depth is over 22m, with an average of about 12m to 15m


Granite of the late Pre-Cambrian Peninsula pluton


Big boulders and rock outcrops over an extensive area. High relief in deeper areas with swim-throughs, holes and overhangs.

Stonehenge blinder is a huge granite corestone pinnacle about 65m E-W by 45m N-S at base, tapering to 45m E-W by 25m N-S near the top. There is a narrow crack about 1.5m wide and several metres deep by 15 or more metres long near the south east side, and the north side is very sheer. The top point is a bit away from the north eastern edge and is about 3m deep. The bottom is rock at 20m+.


Cold water, Strong surge in gulleys and swim-throughs, and over the top of the shallow parts of the reef. Strong offshore winds may develop over a short time.

Skill level

No special skills required. The ability to deploy a DSM and use a compass is useful.


Good photographic site. (photographic equipment suggestions)


A light can be useful to look into dark places and to restore colour at depth. A compass can help keep track of your position, and a DSMB is handy to allow the boat to keep track of ascending divers. Nitrox can extend your no-decompression time if you are well insulated.

Marine life

Typical of the big reefs of the Atlantic coast. There is a heavy growth of red bait in shallow areas, Kelp on top surfaces in moderate depths, and fairly bare rock with urchins on relatively flat deep surfaces. Walls, overhangs and other steep surfaces are covered with wide variety of sponges, corals, ascidians and other invertebrates.

Suggested Routes

Drop in at the pinnacle descend to the bottom. Slowly ascend as you swim around the pinnacle, observing the various zones. If the sea is calm, a safety stop can be done over the top of the pinnacle.



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