Surf Forecasts:
How big are the waves at Extensions today (10 Sep):
- Morning surf: Morning surf (10 Sep, local time) - 7ft (2.1m), 15s period with SW swell.
- Afternoon surf: Afternoon surf (10 Sep, local time) - 8ft (2.5m), 14s period with WSW swell.
- Evening surf: Evening surf (10 Sep, local time) - 8ft (2.4m), 13s period with SW swell.
The current surf forecast for Extensions at 2AM is: 1.6m 12s primary swell from a West-southwest direction and 1.0m 17s secondary swell from a Southwest direction (forecast issued at 07:00pm September 09). An open ocean swell of 0.7m 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 (10 Sep) | 7ft (2.1m) | 15s |
| Afternoon (10 Sep) | 8ft (2.5m) | 14s |
| Evening (10 Sep) | 8ft (2.4m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Sat morning, min 14°C on Wed night). Winds increasing (light winds from the SSE on Thu morning, near gales from the ESE by Sat morning). | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | |||||||||||||||||
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 | WSW 12 | SW 12 | WSW 12 | SW 16 | SW 15 | SW 14 | WSW 14 | WSW 13 | WSW 13 | SW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 382 | 521 | 766 | 759 | 1330 | 1520 | 2590 | 2378 | 1859 | 1885 | 2174 | 1383 | 1221 | 1080 | 919 | 816 | 710 | 575 | 475 |
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-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:16PM1.56m | 2:33AM1.51m | 2:52PM1.66m | 3:10AM1.55m | 3:26PM1.70m | ||||||||||||||
Low Tide | 8:32PM0.09m | 8:42AM0.04m | 9:09PM0.01m | 9:16AM0.01m | 9:43PM-0.01m | ||||||||||||||
 |  | | |  |  | | | |  | | | | | |  | | | | |
 | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — |
 | 6:32 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:34 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 |
Feels °C | 12 | 12 | 11 | 10 | 11 | 13 | 13 | 13 | 12 | 11 | 8 | 8 | 7 | 6 | 5 | 4 | 3 | 4 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 13 | WSW 12 | SW 12 | WSW 12 | SW 12 | SW 15 | SW 14 | WSW 14 | WSW 13 | WSW 13 | SW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 |
| kJ | 382 | 521 | 766 | 759 | 822 | 1520 | 2590 | 2378 | 1859 | 1885 | 2174 | 1383 | 1221 | 1080 | 919 | 816 | 710 | 575 | 475 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SW 18 | SW 17 | SW 16 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SSW 10 |
| kJ | 14 | 13 | 150 | 536 | 1330 | 756 | — | — | — | — | — | — | — | — | — | — | — | 74 | 56 |
Swell 3 Height (m) Direction Period (s) | ESE 7 | ESE 10 | SE 9 | SE 9 | SSE 9 | — | — | — | — | — | — | — | — | — | — | — | — | SW 15 | SW 15 |
| kJ | 5 | 10 | 19 | 20 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | 75 | 104 |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSE 4 | SE 4 | SSE 4 | SSE 4 | — | — | — | — | S 3 | SE 3 | S 6 | S 7 | S 7 | SSE 6 | SSE 7 | SSE 7 | SE 7 | SE 7 |
| kJ | 8 | 8 | 14 | 12 | 11 | — | — | — | — | 7 | 6 | 235 | 286 | 263 | 350 | 533 | 766 | 843 | 830 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 12 | 27 | 26 | 12 | 26 | 12 | 26 | 271 | 34 | 76 | 76 | 37 | 37 | 48 | 48 | 400 | 48 | 48 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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