Surf Forecasts:
How big are the waves at Extensions today (12 Aug):
- Morning surf: Morning surf (12 Aug, local time) - 6ft (1.8m), 19s period with SW swell.
- Afternoon surf: Afternoon surf (12 Aug, local time) - 6.5ft (2.0m), 18s period with SW swell.
- Evening surf: Evening surf (12 Aug, local time) - 7ft (2.1m), 17s period with SW swell.
The current surf forecast for Extensions at 1AM is: 1.4m 21s primary swell from a Southwest direction and 1.0m 11s secondary swell from a South-southwest direction (forecast issued at 07:00pm August 11). An open ocean swell of 1.8m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Aug) | 6ft (1.8m) | 19s |
| Afternoon (12 Aug) | 6.5ft (2.0m) | 18s |
| Evening (12 Aug) | 7ft (2.1m) | 17s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 12°C on Tue night). Winds decreasing (near gales from the ESE on Tue night, light winds from the NNW by Thu night). | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | |||||||||||||||||
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) | SSW 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SW 18 | SW 18 | SW 17 | SW 17 | SW 16 | SW 21 | SW 20 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 455 | 1055 | 1542 | 2150 | 2207 | 2339 | 2344 | 2267 | 2375 | 2595 | 2135 | 1892 | 1976 | 3538 | 3538 | 3039 | 2535 | 2178 | 2049 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross | cross | cross |
High Tide | 2:32PM1.51m | 2:48AM1.53m | 3:14PM1.62m | 3:30AM1.57m | 3:53PM1.68m | ||||||||||||||
Low Tide | 8:44PM0.13m | 9:02AM0.02m | 9:28PM0.05m | 9:40AM-0.02m | 10:08PM0.02m | ||||||||||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | 7:28 | — | — | — | — | — | — | — | 7:28 | — | — | — | — | — | — |
 | 6:12 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:14 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 13 | 13 | 12 | 12 | 13 | 13 | 17 | 20 | 20 | 20 | 20 | 20 | 19 | 21 | 24 | 24 | 22 | 21 |
Feels °C | 5 | 2 | 5 | 5 | 5 | 7 | 9 | 14 | 17 | 14 | 12 | 14 | 15 | 15 | 17 | 21 | 22 | 20 | 16 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SW 22 | SW 21 | SW 20 | SW 19 | SW 18 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 16 |
| kJ | 429 | 329 | 1542 | 2150 | 2207 | 2339 | 2344 | 2267 | 2375 | 2595 | 2135 | 1892 | 1892 | 3538 | 3538 | 3039 | 2535 | 2178 | 2049 |
Swell 2 Height (m) Direction Period (s) | SW 24 | SW 23 | SSW 11 | SSW 11 | SW 11 | SE 8 | SE 8 | SE 8 | SE 8 | S 10 | SW 21 | SW 21 | SW 20 | SE 10 | SE 10 | SE 11 | SE 11 | SE 9 | SE 10 |
| kJ | 455 | 1055 | 251 | 211 | 172 | 335 | 244 | 219 | 205 | 8 | 880 | 1875 | 1976 | 265 | 180 | 162 | 134 | 71 | 74 |
Swell 3 Height (m) Direction Period (s) | WSW 10 | WSW 10 | — | — | — | SW 11 | SW 10 | SW 10 | SW 10 | — | S 10 | S 10 | SE 10 | — | — | NNW 7 | NNW 7 | NNW 6 | — |
| kJ | 22 | 20 | — | — | — | 137 | 110 | 82 | 64 | — | 8 | 9 | 87 | — | — | 9 | 29 | 36 | — |
Wind waves Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 8 | ESE 8 | ESE 9 | — | SE 9 | SE 8 | SE 7 | SE 10 | ESE 10 | — | — | — | — | NNW 6 |
| kJ | 601 | 773 | 530 | 468 | 423 | 909 | 857 | 756 | — | 278 | 321 | 242 | 377 | 761 | — | — | — | — | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 37 | 37 | 25 | 25 | 25 | 18 | 0 | 0 | 0 | 25 | 26 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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