Surf Forecasts:
How big are the waves at Extensions today (17 Aug):
- Morning surf: Morning surf (17 Aug, local time) - 10ft (3.0m), 13s period with WSW swell.
- Afternoon surf: Afternoon surf (17 Aug, local time) - 10ft (3.0m), 13s period with WSW swell.
- Evening surf: Evening surf (17 Aug, local time) - 8ft (2.5m), 13s period with WSW swell.
The current surf forecast for Extensions at 5PM is: 2.5m 13s primary swell from a West-southwest direction and 0.6m 16s secondary swell from a West-southwest direction (forecast issued at 01:00pm August 17). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | 10ft (3.0m) | 13s |
| Afternoon (17 Aug) | 10ft (3.0m) | 13s |
| Evening (17 Aug) | 8ft (2.5m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Mon afternoon. Very mild (max 16°C on Mon afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SE on Tue night, light winds from the WNW by Wed night). | |||||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||||
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) | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2528 | 2658 | 2354 | 2449 | 2279 | 1766 | 1974 | 2001 | 1310 | 2063 | 2859 | 2990 | 2924 | 2397 | 2454 | 2196 | 1978 | 1978 | 1771 | 1665 | 1693 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | on | on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | on |
High Tide | 6:12PM1.43m | 6:31AM1.21m | 6:47PM1.29m | 7:10AM1.10m | 7:27PM1.16m | ||||||||||||||||
Low Tide | 11:56AM0.25m | 00:31AM0.30m | 12:29PM0.37m | 1:07AM0.42m | 1:04PM0.50m | ||||||||||||||||
 | |  |  |  | | | |  | | | | | | | | | | | |  | |
 | — | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — |
 | — | — | 6:15 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:17 | — | — |
mm | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 15 |
Feels °C | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 | 11 | 9 | 8 | 8 | 7 | 8 | 8 | 11 | 11 | 11 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
| kJ | 2528 | 2658 | 2354 | 2449 | 2279 | 1766 | 1974 | 2001 | 1310 | 2063 | 2859 | 2990 | 2924 | 2397 | 2454 | 2196 | 1978 | 1978 | 1771 | 1665 | 1693 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 16 | E 10 | E 10 | SW 14 | WSW 13 | E 11 | SW 13 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 211 | 8 | 8 | 304 | 69 | 2 | 778 | 531 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 16 | — | — | E 11 | — | — | E 11 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 65 | — | — | 9 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NW 4 | — | — | — | — | — | — | — | — | — | SSE 3 | SE 4 | SE 4 | ESE 4 | ESE 4 | — | — | — | — | — |
| kJ | 9 | 29 | — | — | — | — | — | — | — | — | — | 7 | 12 | 24 | 15 | 8 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 1 | 20 | 1 | 1 | 1 | 3 | 12 | 0 | 12 | 12 | 34 | 33 | 33 | 12 | 26 | 0 | 3 | 1 | 1 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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