Surf Forecasts:
How big are the waves at Extensions today (13 Sep):
- Afternoon surf: Afternoon surf (13 Sep, local time) - 6ft (1.8m), 14s period with SW swell.
- Evening surf: Evening surf (13 Sep, local time) - 5.5ft (1.7m), 13s period with SW swell.
The current surf forecast for Extensions at 11PM is: 1.6m 13s primary swell from a Southwest direction and 0.8m 4s secondary swell from a North-northwest direction (forecast issued at 07:00pm September 13). An open ocean swell of 1.0m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Sep) | - | - |
| Afternoon (13 Sep) | 6ft (1.8m) | 14s |
| Evening (13 Sep) | 5.5ft (1.7m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 22mm), heaviest during Tue night. Very mild (max 17°C on Sun night, min 12°C on Tue night). Winds increasing (light winds from the NNW on Sun night, strong winds from the S by Tue night). | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | |||||||||||||||||
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 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 6 | SW 16 | SW 16 | SW 15 | WSW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 1208 | 1014 | 827 | 732 | 643 | 504 | 473 | 361 | 434 | 460 | 466 | 405 | 340 | 353 | 426 | 755 | 1194 | 1850 | 3879 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross |
High Tide | 4:29PM1.63m | 4:47AM1.45m | 4:59PM1.53m | 5:18AM1.36m | 5:29PM1.41m | ||||||||||||||
Low Tide | 10:45PM0.07m | 10:49AM0.16m | 11:15PM0.17m | 11:18AM0.26m | |||||||||||||||
 |  | | |  |  | |  | | | | | | | | | | | | |
 | — | — | — | — | 6:47 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — |
 | 6:35 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | 1 | 1 | 2 | 2 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 3 |
Temp °C | 18 | 17 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 |
Feels °C | 20 | 16 | 11 | 12 | 12 | 11 | 11 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 6 | 7 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 16 | SW 16 | SW 15 | WSW 15 |
| kJ | 1208 | 1014 | 827 | 732 | 643 | 504 | 473 | 361 | 268 | 268 | 263 | 250 | 198 | 194 | 205 | 755 | 1194 | 1850 | 3879 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 9 | SE 11 | SE 10 | SE 11 | SE 12 | SE 11 | SE 13 | SE 13 | SW 16 | SW 16 | SW 17 | SE 13 | SE 13 | SE 13 | SE 13 |
| kJ | 232 | 191 | 129 | 84 | 76 | 110 | 89 | 56 | 47 | 29 | 42 | 26 | 42 | 96 | 190 | 7 | 7 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 12 | SE 11 | — | — | — | — | SE 13 | — | — | ESE 13 | ESE 13 | ESE 13 | SE 13 | — | ESE 13 | — |
| kJ | — | — | — | 22 | 33 | — | — | — | — | 6 | — | — | 16 | 16 | 17 | 7 | — | 33 | — |
Wind waves Height (m) Direction Period (s) | — | — | NNW 4 | NNW 4 | NNW 5 | NNW 5 | NW 6 | NW 6 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 6 | NW 7 | NW 7 | NW 7 | NNW 7 |
| kJ | — | — | 16 | 35 | 77 | 97 | 123 | 222 | 434 | 460 | 466 | 405 | 340 | 353 | 426 | 623 | 612 | 569 | 180 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 1 | 24 | 35 | 35 | 35 | 50 | 50 | 155 | 26 | 35 | 59 | 35 | 25 | 167 | 167 | 220 | 167 | 35 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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