Surf Forecasts:
How big are the waves at Extensions today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 11ft (3.5m), 13s period with SW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 10ft (3.0m), 13s period with SW swell.
- Evening surf: Evening surf (20 Aug, local time) - 8ft (2.5m), 12s period with SW swell.
The current surf forecast for Extensions at 3AM is: 3.0m 13s primary swell from a Southwest direction (forecast issued at 07:00pm August 19). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 11ft (3.5m) | 13s |
| Afternoon (20 Aug) | 10ft (3.0m) | 13s |
| Evening (20 Aug) | 8ft (2.5m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 12°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the SE by Thu night). | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | |||||||||||||||||
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 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 1742 | 1665 | 1789 | 2418 | 4058 | 4464 | 3903 | 3165 | 2536 | 2185 | 1835 | 1513 | 1291 | 1054 | 882 | 527 | 458 | 427 | 366 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | 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 | cross |
High Tide | 7:27PM1.16m | 8:02AM0.99m | 8:29PM1.04m | 9:44AM0.92m | 10:23PM0.98m | ||||||||||||||
Low Tide | 1:53AM0.54m | 1:54PM0.62m | 3:16AM0.63m | 3:46PM0.71m | |||||||||||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:18 | — | — | — | — | — | — |
 | 6:17 | — | — | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 15 | 14 | 14 | 14 |
Feels °C | 12 | 14 | 14 | 12 | 12 | 12 | 12 | 10 | 9 | 8 | 8 | 7 | 5 | 5 | 6 | 10 | 8 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 11 | WSW 11 | WSW 11 | SSW 10 |
| kJ | 1742 | 1665 | 1789 | 2418 | 4058 | 4464 | 3903 | 3165 | 2536 | 2185 | 1835 | 1513 | 1291 | 1054 | 882 | 527 | 458 | 427 | 345 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 11 | SSW 11 | SSW 10 | SSW 10 | WSW 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 495 | 322 | 316 | 304 | 366 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SE 4 | SE 4 | SE 5 | SE 5 | SE 5 | SE 5 | SSE 5 | SSE 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 19 | 44 | 65 | 91 | 76 | 57 | 69 | 42 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 12 | 30 | 27 | 27 | 27 | 26 | 25 | 12 | 34 | 12 | 26 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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