Surf Forecasts:
How big are the waves at Extensions today (12 Sep):
- Morning surf: Morning surf (12 Sep, local time) - 6.5ft (2.0m), 14s period with SW swell.
- Afternoon surf: Afternoon surf (12 Sep, local time) - 7.5ft (2.3m), 16s period with SW swell.
- Evening surf: Evening surf (12 Sep, local time) - 8ft (2.5m), 16s period with SW swell.
The current surf forecast for Extensions at 1AM is: 1.2m 11s primary swell from a West-southwest direction and 0.8m 14s secondary swell from a Southwest direction (forecast issued at 07:00pm September 11). An open ocean swell of 3.0m 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 (12 Sep) | 6.5ft (2.0m) | 14s |
| Afternoon (12 Sep) | 7.5ft (2.3m) | 16s |
| Evening (12 Sep) | 8ft (2.5m) | 16s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Very mild (max 18°C on Mon morning, min 14°C on Fri night). Winds decreasing (near gales from the ESE on Sat afternoon, light winds from the NE by Sun night). | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | |||||||||||||||||
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 12 | WSW 12 | WSW 12 | WSW 11 | SW 14 | SW 14 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 710 | 615 | 467 | 366 | 1147 | 1580 | 2038 | 2421 | 3525 | 3534 | 3185 | 2633 | 2278 | 1983 | 1665 | 1363 | 1208 | 1014 | 827 |
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-off | cross-off | off | off | off | off | off | cross-off | off | off | cross-off |
High Tide | 3:26PM1.70m | 3:44AM1.55m | 3:58PM1.69m | 4:16AM1.52m | 4:29PM1.63m | ||||||||||||||
Low Tide | 9:43PM-0.01m | 9:48AM0.03m | 10:15PM0.01m | 10:19AM0.08m | 10:45PM0.07m | ||||||||||||||
 |  | | | |  | | |  | | | | | | | | | |  | |
 | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:48 | — | — | — | — | — | — |
 | 6:34 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — | — | 6:35 | — | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 15 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 16 | 17 | 16 | 17 |
Feels °C | 5 | 4 | 4 | 6 | 7 | 6 | 6 | 5 | 3 | 4 | 6 | 6 | 6 | 8 | 10 | 11 | 11 | 11 | 16 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 12 | WSW 11 | SW 14 | SW 14 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SE 9 |
| kJ | 710 | 615 | 467 | 366 | 1147 | 1580 | 2038 | 2421 | 3525 | 3534 | 3185 | 2633 | 2278 | 1983 | 1665 | 1363 | 1208 | 1014 | 412 |
Swell 2 Height (m) Direction Period (s) | — | SW 15 | SSW 10 | SW 14 | WSW 12 | — | — | SW 18 | — | — | — | — | — | — | — | — | — | — | SW 13 |
| kJ | — | 75 | 56 | 289 | 29 | — | — | 735 | — | — | — | — | — | — | — | — | — | — | 827 |
Swell 3 Height (m) Direction Period (s) | — | SW 15 | SW 15 | SSW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 75 | 104 | 40 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 9 | — |
| kJ | 820 | 752 | 786 | 808 | 630 | 576 | 643 | 907 | 973 | 952 | 1003 | 909 | 769 | 611 | 545 | 519 | 736 | 668 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 400 | 61 | 48 | 48 | 37 | 41 | 48 | 337 | 337 | 48 | 37 | 37 | 37 | 37 | 25 | 25 | 26 | 25 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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