Surf Forecasts:
How big are the waves at Derde Steen today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 7ft (2.1m), 11s period with SW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 6.5ft (2.0m), 11s period with SW swell.
- Evening surf: Evening surf (21 Aug, local time) - 4.5ft (1.4m), 11s period with SSW swell.
The current surf forecast for Derde Steen at 8PM is: 1.4m 11s primary swell from a South-southwest direction and 1.3m 11s secondary swell from a West-southwest direction (forecast issued at 01:00pm August 21). The wind direction is predicted to be glassy and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 7ft (2.1m) | 11s |
| Afternoon (21 Aug) | 6.5ft (2.0m) | 11s |
| Evening (21 Aug) | 4.5ft (1.4m) | 11s |
Table - waves today at Derde Steen. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 18°C on Fri afternoon, min 12°C on Sun morning). Wind will be generally light. | |||||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | |||||||||||||||||||
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 |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SSW 11 | WSW 11 | SSW 10 | WSW 11 | WSW 11 | SSW 12 | SSW 12 | SSW 12 | SW 11 | SW 10 | SW 10 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 882 | 935 | 792 | 436 | 396 | 388 | 304 | 275 | 443 | 390 | 397 | 729 | 847 | 707 | 1697 | 1726 | 1674 | 1581 | 1532 | 1068 | 933 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | glassy | cross-on | cross | glassy | cross-off | cross | cross-on | on | glassy | glassy | cross-off | glassy | cross-off | cross | cross-on | cross | cross-off | cross |
High Tide | 9:49AM0.92m | 10:25PM0.98m | 11:54AM0.96m | 00:06AM1.04m | 12:58PM1.07m | ||||||||||||||||
Low Tide | 3:53PM0.70m | 5:32AM0.61m | 6:08PM0.66m | 6:46AM0.52m | 7:07PM0.56m | ||||||||||||||||
 | | |  | | |  |  | | |  | |  | | | | | | | | | |
 | — | — | — | — | — | — | 7:16 | — | — | — | — | — | — | — | 7:16 | — | — | — | — | — | — |
 | — | — | 6:20 | — | — | — | — | — | — | — | 6:21 | — | — | — | — | — | — | — | 6:21 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 18 | 17 | 16 | 13 | 13 | 13 | 13 | 15 | 16 | 15 | 15 | 14 | 13 | 13 | 12 | 14 | 16 | 16 | 14 | 13 |
Feels °C | 13 | 16 | 15 | 15 | 12 | 13 | 14 | 12 | 13 | 13 | 13 | 15 | 14 | 13 | 13 | 11 | 13 | 14 | 13 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SSW 11 | WSW 11 | SSW 10 | SSW 10 | WSW 11 | SSW 12 | SSW 12 | SSW 12 | SW 11 | SW 10 | SW 10 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
| kJ | 882 | 935 | 792 | 436 | 366 | 388 | 304 | 275 | 443 | 390 | 397 | 729 | 847 | 707 | 1697 | 1726 | 1674 | 1581 | 1532 | 1068 | 933 |
Swell 2 Height (m) Direction Period (s) | S 6 | — | — | WSW 11 | — | WSW 11 | WSW 11 | SSW 10 | WSW 11 | WSW 10 | WSW 10 | SW 16 | WSW 15 | WSW 14 | SW 11 | — | — | — | — | SSW 11 | SSW 11 |
| kJ | 41 | — | — | 372 | — | 317 | 286 | 173 | 176 | 173 | 152 | 64 | 193 | 501 | 130 | — | — | — | — | 222 | 260 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 14 | SSW 14 | SSW 13 | — | W 18 | WSW 17 | — | — | SSW 12 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 77 | 79 | 212 | — | 6 | 29 | — | — | 133 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | S 11 | — | SSW 10 | — | — | — | — | NNW 2 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 535 | — | 396 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 3 | 17 | 0 | 17 | 1 | 0 | 0 | 32 | 32 | 32 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 3 | 0 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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