Key Summary
- Overview of Steenbras Deep as a boat-access-only dive site near Gordon’s Bay.
- Detailed description of underwater terrain and marine life.
- Guidelines for spearfishing, safety, and gear recommendations.
- Best times and conditions for diving this challenging site.
Steenbras Deep Dive Site Overview
Steenbras Deep
is one of the more secluded and less frequently visited dive sites in False Bay, located off the coast of Gordon’s Bay. This deep-water site is accessible only by boat, making it a top choice for experienced divers and spearfishers. Due to its depth, ranging from 18 to 35 meters, it is recommended for advanced divers who are comfortable with deeper dives and variable conditions for spearfishing.
The site is located around 10.5 km from Harbour Island and about 10.1 km from Gordon’s Bay harbor. While not situated within a Marine Protected Area (MPA), it is essential to follow all local regulations when spearfishing, especially since the conditions can be unpredictable.
Getting to Steenbras Deep
The journey to Steenbras Deep typically begins at Harbour Island, where boats launch for the trip to this dive site. The ride can be quite bumpy, especially on windy days, due to the site’s exposure to open seas. It is crucial to monitor weather conditions, as southeasterly winds during summer can improve visibility, while river runoff from the Steenbras River can sometimes affect water clarity.
Location to Steenbras Deep: 
Spearfishing and Diving Conditions
Steenbras Deep is a popular spot among spearfishers, especially for those targeting deeper water species. The site’s underwater landscape features a combination of rocky outcrops, pinnacles, and sandy patches that provide habitats for various fish species. However, visibility is often unpredictable, with reports ranging from 2 to 10 meters.
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Depth Range
The reef varies between 18 and 35 meters. The South Pinnacle rises to around 17 meters, while the North Pinnacle peaks at 18 meters, dropping to about 30 meters at its base.
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Visibility
Visibility can change dramatically due to thermoclines, river runoff, and surface currents. In some cases, deeper areas may have better visibility than the surface due to clearer bottom water layers.
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Water Temperature
The water temperature typically ranges between 12 and 18°C, so a 5mm wetsuit with an integrated hood is recommended for thermal comfort.
Marine Life at Steenbras Deep
The marine life at Steenbras Deep is diverse and includes species that are not as commonly found on the western side of False Bay. This makes it a rewarding site for both spearfishing and marine photographers. Some of the species you may encounter include:
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Silver Cob
Occasionally spotted in the deeper sections, these are a prized target for spearfishers.
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Steenbras
Known for their elusive nature, Steenbras are highly sought after.
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Red Stumpnose
Often found around rocky crevices, adding to the excitement of deeper spearfishing.
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West Coast Rock Lobster
Abundant in the cracks and gullies, though they cannot be taken without a permit.
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Puffadder Shysharks and Spiny Dogfish
Commonly seen resting on the seabed.
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Nudibranchs
The reef is home to vibrant nudibranchs, like the Orange Gas Flame Nudibranch and Frilled Nudibranch, making it a photographer’s delight.
The reef itself is covered with colorful soft corals, sponges, and sea fans, creating a picturesque underwater landscape that is best appreciated with a good dive light.
Best Times and Conditions for Diving
The optimal time to dive Steenbras Deep is during the summer months, particularly when the southeasterly winds clear the waters. However, the site is exposed to the influence of the Steenbras River, which can bring in murky water, especially after heavy rains.
Divers can expect varying visibility, often better at deeper levels below the thermocline. It is advised to choose days with low swell and light winds for the best diving experience. Water temperatures can drop significantly below the thermocline, so thermal protection is essential.
Safety Tips for Diving and Spearfishing at Steenbras Deep
Given the site’s depth and potential boat traffic, it’s crucial to take extra precautions:
Use a Buoy Line
A buoy line with a float is essential to mark your position, especially in areas with frequent boat traffic.
Diver-Down Alpha Flag
Ensure that your boat displays this flag to alert other vessels that divers are in the water.
Check Weather and Tides
False Bay can experience sudden changes in conditions, so always check forecasts before heading out.
Check how to read weather here:
Dive with a Buddy
Given the depth and potential currents, diving with a partner is highly recommended for safety.
Stay Hydrated
Diving at greater depths requires more exertion, so ensure you are well-hydrated and prepared.
Here’s an article on Hydration:
Gear Recommendations for Steenbras Deep
The right gear is crucial for a successful dive at Steenbras Deep:
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Wetsuits
A 5mm wetsuit with an integrated hood is ideal for the cooler temperatures.
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Fins
High-performance fins, such as Freedivers Pure Carbon Blades, provide excellent propulsion for navigating deeper waters.
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Masks and Snorkels
A low-volume mask, like the Reef Inferno, offers clear visibility.
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Spearguns
A 1m or 1.1m speargun is recommended for targeting fish in deeper waters where visibility can be limited.
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Buoy Line
An absolute must for safety, especially with boat traffic in the area.
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Dive Lights
A powerful dive light is essential for exploring the deeper, darker sections of the reef.
Personal Insights and Expert Tips
Experienced divers highlight Steenbras Deep as a challenging yet rewarding site for those seeking to push their limits. The deeper waters attract larger fish species, making it an exciting location for spearfishing. However, be prepared for changing conditions, especially the thermoclines that can drastically alter visibility and water temperature.
The site is also known for its colorful reef life, including sponges, corals, and a wide variety of nudibranchs. Photographers should bring external lighting to capture the vibrant colors hidden beneath the surface.
Conclusion
Steenbras Deep is a hidden gem in False Bay that offers a unique diving experience for those willing to venture beyond the usual spots. With its combination of rocky pinnacles, diverse marine life, and challenging depths, it’s a site that promises both adventure and reward. By following safety protocols and coming prepared with the right gear, divers can explore one of False Bay’s less frequented dive sites with confidence.
