Surf Forecasts:
Derde Steen surf forecast from 21 Sep 2026:
- Best quality surf: Thursday 24 Sep, 8PM (local time) - 6ft (1.9m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 27 Sep, 11PM (local time) - 8ft (2.5m), 14s period, SSW swell with 2,325 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 8AM (local time) - 4.5ft (1.4m), 12s period with WSW swell.
Best Forecast Surf Conditions for Derde Steen this week:
The surf forecast for Derde Steen over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 8AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.9m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Derde Steen in the next 16 days are 2.5m 14s and forecast to arrive on Sunday (Sep 27) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Monday (Sep 21) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Mon 21st Sep) | 4.5ft (1.4m) 12s |
| Best Surf | 8PM (Thu 24th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 11PM (Sun 27th Sep) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Derde Steen over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 28°C on Mon afternoon, min 15°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Fri night. Warm (max 28°C on Thu afternoon, min 13°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WSW 12 | SW 11 | SW 11 | SW 13 | SW 12 | SW 11 | SW 11 | S 7 | SSE 7 | SW 10 | SSW 15 | SSW 13 | SSW 12 | SW 12 | SW 12 | SW 15 | SW 14 | WSW 14 | SW 13 | WSW 13 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 472 | 380 | 273 | 336 | 409 | 332 | 191 | 309 | 258 | 144 | 911 | 1269 | 795 | 671 | 488 | 2150 | 2085 | 1487 | 1756 | 1151 | 862 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | off | cross-on | on | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-on | on | cross | cross | cross-on | cross-off | cross-on | cross | cross |
High Tide | 12:26PM1.08m | 00:34AM1.10m | 1:02PM1.21m | 1:11AM1.22m | 1:32PM1.35m | 1:43AM1.33m | 2:00PM1.47m | 2:15AM1.43m | 2:28PM1.57m | 2:46AM1.50m | 2:58PM1.65m | 3:18AM1.54m | 3:29PM1.68m | 3:51AM1.55m | |||||||
Low Tide | 6:42PM0.56m | 6:52AM0.44m | 7:17PM0.43m | 7:23AM0.33m | 7:46PM0.30m | 7:51AM0.23m | 8:15PM0.18m | 8:20AM0.15m | 8:44PM0.08m | 8:49AM0.09m | 9:14PM0.01m | 9:19AM0.06m | 9:45PM-0.02m | ||||||||
 | |  |  |  |  | | | | | | | |  |  |  | | | | | | |
 | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:28 | — | — |
 | — | 6:40 | — | — | 6:42 | — | — | 6:42 | — | — | 6:43 | — | — | 6:44 | — | — | 6:44 | — | — | 6:45 | — |
mm | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 17 | 7 | — | — | — | — | 2 |
Temp °C | 24 | 28 | 26 | 27 | 21 | 16 | 17 | 19 | 16 | 22 | 28 | 24 | 24 | 21 | 18 | 15 | 16 | 15 | 16 | 17 | 16 |
Feels °C | 23 | 26 | 26 | 26 | 20 | 17 | 13 | 15 | 13 | 21 | 26 | 23 | 24 | 20 | 19 | 12 | 12 | 14 | 14 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | SW 11 | SW 11 | SW 13 | SW 12 | SW 11 | SW 11 | SW 11 | S 7 | S 7 | SSW 15 | SSW 13 | SSW 12 | SW 12 | SW 12 | SW 15 | SW 14 | WSW 14 | SW 13 | WSW 13 | WSW 14 |
| kJ | 472 | 380 | 273 | 336 | 409 | 332 | 191 | 115 | 178 | 88 | 911 | 1269 | 795 | 671 | 488 | 2150 | 2085 | 1487 | 1756 | 1151 | 862 |
Swell 2 Height (m) Direction Period (s) | S 6 | SW 15 | SW 14 | WSW 11 | WSW 11 | S 13 | S 12 | — | SW 10 | SW 10 | SSW 9 | SSE 6 | — | W 20 | SW 17 | — | S 9 | S 11 | — | — | — |
| kJ | 44 | 57 | 198 | 133 | 91 | 4 | 3 | — | 177 | 110 | 133 | 32 | — | 7 | 394 | — | 6 | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | S 7 | SE 6 | — | — | — | — | — | SSW 16 | WSW 12 | — | — | — | S 11 | — | — | — | — | — | — |
| kJ | — | — | 23 | 9 | — | — | — | — | — | 144 | 28 | — | — | — | 2 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | S 6 | — | — | — | S 4 | S 4 | S 7 | SSE 7 | — | — | — | — | — | — | — | — | — | S 7 | S 5 | S 8 |
| kJ | 80 | 36 | — | — | — | 7 | 17 | 309 | 258 | — | — | — | — | — | — | — | — | — | 91 | 108 | 466 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 3 | 0 | 32 | 32 | 1 | 125 | 342 | 3 | 0 | 3 | 0 | 32 | 10 | 6 | 32 | 32 | 0 | 3 | 95 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Derde Steen surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Derde Steen Surf forecast
The above surf forecast table for Derde Steen provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Derde Steen can be found by selecting the local surf guide option on the grey menu. Our Derde Steen surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Derde Steen) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Derde Steen may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Derde Steen is 8 km (5 miles) from the very large city of Robben Island. If you plan a holiday in Cape Town, look for hotels and other accommodation in Robben Island. Robben Island has rooms for a wide range of budgets as well as cheap car hire and transport links.
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