Surf Forecasts:
How big are the waves at Extensions today (18 Aug):
- Afternoon surf: Afternoon surf (18 Aug, local time) - 8ft (2.5m), 13s period with SW swell.
- Evening surf: Evening surf (18 Aug, local time) - 10ft (3.0m), 12s period with SW swell.
The current surf forecast for Extensions at 11PM is: 3.0m 12s primary swell from a Southwest direction (forecast issued at 07:00pm August 18). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | - | - |
| Afternoon (18 Aug) | 8ft (2.5m) | 13s |
| Evening (18 Aug) | 10ft (3.0m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 14°C on Wed afternoon, min 11°C on Fri morning). Winds increasing (calm on Wed night, fresh winds from the ESE by Fri morning). | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||
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 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 2984 | 2972 | 2924 | 2507 | 2454 | 2185 | 2078 | 1978 | 1742 | 1665 | 1789 | 2183 | 3185 | 3933 | 3587 | 3165 | 2577 | 2185 | 1835 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | glassy | glassy | glassy | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off |
High Tide | 6:47PM1.29m | 7:10AM1.10m | 7:27PM1.16m | 8:02AM0.99m | 8:29PM1.04m | ||||||||||||||
Low Tide | 1:07AM0.42m | 1:04PM0.50m | 1:53AM0.54m | 1:54PM0.62m | |||||||||||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — |
 | 6:16 | — | — | — | — | — | — | — | 6:17 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 13 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 |
Feels °C | 10 | 8 | 8 | 7 | 7 | 8 | 10 | 10 | 12 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 10 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 |
| kJ | 2984 | 2972 | 2924 | 2507 | 2454 | 2185 | 2078 | 1978 | 1742 | 1665 | 1789 | 2183 | 3185 | 3933 | 3587 | 3165 | 2577 | 2185 | 1835 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSE 3 | SE 4 | SE 4 | ESE 4 | ESE 4 | — | — | — | — | — | — | — | — | — | — | — | — | ESE 3 |
| kJ | — | 7 | 10 | 24 | 15 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 37 | 33 | 33 | 33 | 12 | 26 | 5 | 5 | 0 | 0 | 0 | 5 | 0 | 12 | 12 | 12 | 30 | 30 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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