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Surf Forecasts:

Derde Steen surf break

Derde Steen surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Monday 15 Sep 2025 SAST
Forecast update in hr  min  s Forecast update imminent
Derde Steen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Derde Steen sea temperature is
14.8° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Derde Steen this week:

The surf forecast for Derde Steen over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 11AM. The primary swell is predicted to be 4.5m and 12s period. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Derde Steen in the next 12 days are 5.0m 13s and forecast to arrive on Tuesday (Sep 16) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Friday (Sep 19) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Tue 16th Sep)15ft (4.5m) 12s
Best Surf11AM (Tue 16th Sep)15ft (4.5m) 12s
Most Powerful 8AM (Tue 16th Sep)16ft (5.0m) 13s

Table - best surf conditions forecast for Derde Steen over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 5mm), mostly falling on Mon night. Very mild (max 15°C on Mon afternoon, min 11°C on Tue night). Winds decreasing (strong winds from the NW on Mon night, calm by Wed night).

Days 3-6 Weather Summary Mostly dry. Very mild (max 18°C on Fri afternoon, min 11°C on Thu night). Wind will be generally light.

Mon
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
!
!
3
!
1
4
3
0
2
2
0
2
1
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.4
SW
4.5
WSW
4.5
WSW
4
SW
2.5
SSW
3
SSW
2.5
SSW
2.2
SSW
1.9
SSW
1.5
S
1.8
SSW
1.5
SSW
1.4
SSW
1.1
SSW
0.7
S
0.7
S
0.8
SSW
0.5
S
0.4
SSE
0.8
SW
1.7
SW
Period(s) (?)121212121112121211111110101012128121278
Wave
Graph
(?)Metric surfscale
Energy (?)248664815895405033503066245116381042902951511554342293251200122100151356
Wind
(km/h)
40
NNW
40
WNW
20
SW
15
SW
10
SSE
10
SW
15
SW
0
E
5
W
20
SSW
15
SSE
10
SE
10
SW
5
ENE
10
WNW
20
SSW
15
SSE
15
S
25
S
20
SSW
20
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on		cross-
on		cross-
on		crosscross-
on		cross-
on		glassglasscross-
on		crosscross-
off		cross-
on		glasscross-
on		cross-
on		crosscrosscrosscross-
on		on
High Tide
/ height (m)
10:34PM
1.07
11:41AM
1.10
12:10AM
1.14
12:47PM
1.23
1:07AM
1.25
1:31PM
1.36
1:48AM
1.34
2:06PM
1.47
2:22AM
1.41
2:36PM
1.55
2:52AM
1.46
3:04PM
1.59
3:21AM
1.48
Low Tide
/ height (m)
4:11PM
0.60
5:18AM
0.51
6:04PM
0.51
6:33AM
0.41
7:05PM
0.38
7:20AM
0.30
7:48PM
0.26
7:57AM
0.21
8:22PM
0.17
8:28AM
0.15
8:52PM
0.11
8:57AM
0.11
9:20PM
0.07
9:24AM
0.11
Mon
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Sunrise--6:45--6:43--6:41--6:39--6:39--6:37--6:35
Sunset6:37--6:37--6:37--6:38--6:39--6:39--6:40--
part cloud
rain showers
clear
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
rain showers
clear
Rain (mm)
-5-----------------2-
Temp. °C151513131313131313141415181817171617191516
Feels °C (?)888810108911111112151615141515161213
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Cape Town

  1. weather stationWind Update Cross-shore wind has turned cross-on at Derde Steen (light winds from the WNW at Observatory wx 19 km from Derde Steen). 2.1m 12s groundswell from the SW with a 1.0m 15s groundswell from the WSW. 2 swells combining so expect closeout sets.

    1 hour 18 minutes ago Derde Steen
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19 km away, 1 h 18 min ago

18 km/h
WNW
0.0
14.8
Air / Water (°C)
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for Derde Steen at:
surf-forecast.com

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 12 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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