Surf Forecasts:
How big are the waves at Extensions today (17 Sep):
- Morning surf: Morning surf (17 Sep, local time) - 7ft (2.1m), 12s period with SW swell.
- Afternoon surf: Afternoon surf (17 Sep, local time) - 6.5ft (2.0m), 12s period with SW swell.
- Evening surf: Evening surf (17 Sep, local time) - 6ft (1.8m), 12s period with SW swell.
The current surf forecast for Extensions at 7PM is: 1.9m 12s primary swell from a Southwest direction (forecast issued at 01:00pm September 17). An open ocean swell of 2.1m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | 7ft (2.1m) | 12s |
| Afternoon (17 Sep) | 6.5ft (2.0m) | 12s |
| Evening (17 Sep) | 6ft (1.8m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 18°C on Sun morning, min 12°C on Thu night). Winds decreasing (near gales from the ESE on Fri afternoon, fresh winds from the SE by Sun morning). | |||||||||||||||||||||
Thu 17 | Friday 18 | Saturday 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) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1272 | 1180 | 1007 | 929 | 897 | 851 | 770 | 770 | 600 | 1021 | 961 | 946 | 917 | 811 | 712 | 772 | 448 | 448 | 1163 | 1528 | 1744 |
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 | 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-off |
High Tide | 6:34PM1.13m | 7:06AM1.01m | 7:26PM1.01m | 8:42AM0.91m | 9:33PM0.93m | ||||||||||||||||
Low Tide | 12:18PM0.50m | 00:52AM0.53m | 1:00PM0.63m | 1:59AM0.64m | 2:48PM0.73m | ||||||||||||||||
 | | |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:41 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — |
 | — | — | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 14 | 14 | 13 | 12 | 12 | 12 | 14 | 16 | 16 | 14 | 13 | 13 | 12 | 12 | 15 | 15 | 17 | 16 | 15 |
Feels °C | 4 | 3 | 4 | 5 | 4 | 2 | 2 | 2 | 4 | 6 | 5 | 3 | 5 | 6 | 5 | 5 | 8 | 6 | 8 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 |
| kJ | 1272 | 1180 | 1007 | 929 | 897 | 851 | 770 | 770 | 600 | 1021 | 961 | 946 | 917 | 811 | 712 | 772 | 448 | 448 | 1163 | 1528 | 1744 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 14 | SW 20 | WSW 18 | SW 18 | WSW 18 | SW 16 | SW 16 | — | SW 14 | SW 14 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 231 | 15 | 31 | 49 | 31 | 127 | 127 | — | 346 | 350 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 6 | SSE 7 | SE 7 | SE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 |
| kJ | 362 | 340 | 431 | 391 | 338 | 328 | 307 | 374 | 411 | 465 | 621 | 625 | 543 | 382 | 440 | 382 | 371 | 451 | 524 | 480 | 411 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 226 | 283 | 3882 | 87 | 55 | 42 | 37 | 42 | 51 | 61 | 55 | 48 | 37 | 30 | 27 | 26 | 26 | 37 | 48 | 41 | 41 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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