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Derde Steen Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Derde Steen surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Monday 18 May 2026 SASTForecast 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
15.8° C
(Which is 1.2°C colder than average for this time of year)How big are the waves at Derde Steen today?
The current surf forecast for Derde Steen at 7AM is: 1.6m 14s primary swell from a West-southwest direction and 0.5m 10s secondary swell from a South direction, 1.1m 6s secondary swell from a South direction (forecast issued at 01:00am May 18). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 5ft (1.6m) | 14s |
| Afternoon (18 May) | 5ft (1.6m) | 14s |
| Evening (18 May) | 5ft (1.5m) | 13s |
Table - waves today at Derde Steen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 22°C on Tue afternoon, min 15°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | SSE 8 | SSE 9 | SSE 9 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | S 10 | S 10 | S 10 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | |
837 | 850 | 889 | 969 | 1042 | 929 | 796 | 722 | 800 | 928 | 1020 | 565 | 414 | 414 | 408 | 330 | 260 | 235 | 188 | 180 | 125 | 121 | 84 | 79 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | on | glassy | cross | |
High Tide | 3:55AM1.62m | 4:28PM1.52m | 4:43AM1.54m | 5:17PM1.46m | 5:35AM1.43m | 6:11PM1.39m | ||||||||||||||||||
Low Tide | 10:15AM-0.00m | 10:34PM0.14m | 11:02AM0.07m | 11:26PM0.21m | 11:52AM0.18m | |||||||||||||||||||
 | |  | |  | |  | |  | | | | | | | | | |  | | | | | | |
 | — | 7:31 | — | — | — | — | — | — | — | 7:33 | — | — | — | — | — | — | — | 7:33 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:51 | — | — | — | — | — | — | — | 5:50 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 15 | 15 | 17 | 20 | 21 | 19 | 17 | 17 | 17 | 17 | 19 | 21 | 22 | 19 | 18 | 17 | 17 | 17 | 19 | 20 | 19 | 18 | 17 |
15 | 13 | 13 | 15 | 17 | 19 | 17 | 15 | 15 | 15 | 16 | 17 | 19 | 21 | 17 | 17 | 16 | 16 | 17 | 18 | 20 | 18 | 19 | 17 | |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | S 8 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 | S 8 | S 7 |
 kJ | 837 | 850 | 889 | 969 | 1042 | 929 | 363 | 428 | 550 | 580 | 614 | 565 | 388 | 313 | 279 | 284 | 240 | 235 | 188 | 130 | 125 | 99 | 84 | 53 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 6 | S 10 | S 8 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 |
| kJ | 71 | 71 | 49 | 78 | 33 | 275 | 796 | 722 | 640 | 615 | 536 | 528 | 414 | 414 | 408 | 330 | 260 | 230 | 184 | 180 | 125 | 121 | 82 | 79 |
Swell 3 Height (m) Direction Period (s) | — | SSE 13 | — | S 10 | S 10 | — | — | S 12 | — | — | S 16 | S 16 | S 15 | S 15 | SSE 14 | — | — | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 |
| kJ | — | 58 | — | 50 | 18 | — | — | 11 | — | — | 5 | 5 | 4 | 4 | 20 | — | — | 14 | 11 | 10 | 38 | 35 | 55 | 74 |
Wind waves Height (m) Direction Period (s) | S 6 | S 6 | S 6 | SSE 6 | S 6 | SSE 7 | SSE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 92 | 92 | 82 | 123 | 97 | 392 | 540 | 600 | 800 | 928 | 1020 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 0 | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 32 | 0 | 6 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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