Overview

DerdeSteen ("Third Stone") is a renowned reef break located north of Big Bay, on the Melkbosstrand coast. This advanced wave spot offers hollow and fast sections breaking over a rocky reef. The south-easterly Cape Doctor creates side-shore to side-offshore conditions, perfect for kite wave riding. The spot attracts experienced riders looking for quality waves away from the Big Bay crowds. With Eerstesteen and Kamers nearby, this stretch of coast forms a true wave riding paradise.

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Spot forecast for DerdeSteen

Sunrise 05:58 · Sunset 19:03

Open-Meteo

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< 7 kn7–12 kn13–20 kn21–30 kn31–40 kn41+ kn Gusts Your minimum: 7 kn

Forecasts provided by Open-Meteo

Swell and waves

Swell and tides over 8 days. Premium members see the swell and tides over 8 days. Without a subscription: 5 days.

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Wave height: < 0.5 m 0.5–1 m 1–2 m 2–3 m ≥ 3 m

Swell data by Open-Meteo Marine

Tides

Heights above lowest astronomical tide, in the spot's local time. Computed 3.2 km from the spot.

Tuesday 20 October Low tide 05:00 · 0.7 m High tide 11:26 · 1.2 m Low tide 17:53 · 0.7 m High tide 23:48 · 1.2 m
Wednesday 21 October Low tide 05:55 · 0.6 m High tide 12:12 · 1.3 m Low tide 18:34 · 0.5 m
Thursday 22 October High tide 00:34 · 1.3 m Low tide 06:35 · 0.5 m High tide 12:47 · 1.5 m Low tide 19:08 · 0.4 m
Friday 23 October High tide 01:11 · 1.4 m Low tide 07:09 · 0.4 m High tide 13:20 · 1.6 m Low tide 19:39 · 0.3 m
Saturday 24 October High tide 01:45 · 1.5 m Low tide 07:42 · 0.3 m High tide 13:52 · 1.7 m Low tide 20:11 · 0.2 m

DerdeSteen: when to go?

Rideable days and hours computed for a minimum wind of 7 knots · log in to set your own (foil, twin-tip…)

Season · peak

252h

in November · 23.5 rideable days

The season runs from September to April, peaking in November: 17 rideable days a month and 252 hours of usable wind, at 25 °C. The low point is July, at 3 days.

Rideable days per month

Wind strength when it is rideable

7-12 knots · 57%13-20 knots · 40%21-30 knots · 3%

When the spot works, wind sits mostly between 7 and 12 knots — 57% of rideable hours. Big-kite territory. The coldest month is July, at 16 °C. The wettest month is July, with 187 mm.

Monthly averages: DerdeSteen

Monthly averages — DerdeSteen — averaged over 2 years of records — Weather data by Open-Meteo.com — How it is calculated
Month	Rideable days	Usable wind	Temperature	Rain
January	16.0	148 h	27 °C	4 mm
February	16.0	164 h	28 °C	3 mm
March	17.5	136 h	26 °C	28 mm
April	15.5	128 h	24 °C	13 mm
May	7.5	43 h	21 °C	32 mm
June	6.0	35 h	18 °C	89 mm
July	3.0	18 h	16 °C	187 mm
August	4.0	20 h	17 °C	80 mm
September	14.0	119 h	20 °C	22 mm
October	19.0	159 h	24 °C	10 mm
November	23.5	252 h	27 °C	5 mm
December	18.0	171 h	27 °C	11 mm

Photo gallery of DerdeSteen

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Technical details of DerdeSteen spot

The spot works with winds from SE, SSE, S.

Rideable Not rideable

Spot functioning

The spot works when the southwest swell combined with the SE Cape Doctor creates quality waves on the reef. Best from mid-tide to high tide — at low tide, the reef is too exposed and dangerous. Waves break from 1 to 3 meters depending on the swell. Afternoon offers the best conditions when the wind is established. Spot reserved for experienced wave riders.

Spot opening date · Required level

Spot opening date: Open all year round
Required level: Advanced

On the water

Cold Atlantic water (12-16°C), 4/3 or 5/3 wetsuit essential. Waves breaking on a rocky reef with hollow and fast sections. Strong currents around the reef. Abundant kelp. Deep water around the reef. Committed conditions requiring good wave riding skills.

Parking

Parking along the Melkbosstrand coastal road (Otto du Plessis Drive). Access to the spot requires a short walk from the road. Little infrastructure nearby. Don't leave valuables in your car.

Wind specificities

South-easterly Cape Doctor, slightly more side-offshore here than at Big Bay due to the more northward-exposed coastline orientation. Wind blows 15 to 35 knots during the season (October-March). Best wave riding conditions are with moderate SE (18-25 knots) combined with a southwest swell.

Hazards

Shallow rocky reef that can cause serious injuries. Powerful hollow waves. Strong currents. Abundant kelp that can tangle in lines and fins. Cold water — hypothermia risk. Isolated spot — no lifeguards. Reserved for advanced and expert riders. Sea urchins on the reef.

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Additional stations

In18.2 km

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source gowind
ZA Seapoint 0m15.8 km

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source pgsonda.cz

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Webcams near DerdeSteen

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Nearby spots

All spots: Cap-Occidental

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DerdeSteen kitesurf and windsurf spot