Surf Forecasts:
How big are the waves at Extensions today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 4.5ft (1.4m), 12s period with WSW swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 4.5ft (1.3m), 12s period with WSW swell.
- Evening surf: Evening surf (21 Sep, local time) - 4ft (1.2m), 11s period with SW swell.
The current surf forecast for Extensions at 1AM is: 1.6m 12s primary swell from a West-southwest direction (forecast issued at 07:00pm September 20). An open ocean swell of 1.6m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 4.5ft (1.4m) | 12s |
| Afternoon (21 Sep) | 4.5ft (1.3m) | 12s |
| Evening (21 Sep) | 4ft (1.2m) | 11s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 23°C on Tue afternoon, min 14°C on Wed afternoon). Winds increasing (light winds from the ENE on Tue morning, near gales from the SE by Wed afternoon). | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | |||||||||||||||||
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 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 1100 | 953 | 871 | 759 | 616 | 536 | 536 | 456 | 373 | 360 | 360 | 303 | 303 | 444 | 431 | 379 | 494 | 486 | 384 |
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 | cross-off | off | on | on | on | cross-on | cross |
High Tide | 11:39PM0.99m | 12:27PM1.07m | 00:35AM1.10m | 1:03PM1.21m | |||||||||||||||
Low Tide | 5:46PM0.68m | 6:12AM0.56m | 6:42PM0.56m | 6:53AM0.44m | 7:17PM0.43m | ||||||||||||||
 |  | | | | | | | | | | |  | |  |  | |  | | |
 | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — |
 | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — |
Temp °C | 18 | 18 | 17 | 15 | 15 | 16 | 18 | 22 | 22 | 22 | 20 | 19 | 21 | 22 | 22 | 23 | 18 | 17 | 15 |
Feels °C | 13 | 12 | 11 | 9 | 9 | 10 | 12 | 17 | 17 | 18 | 17 | 17 | 20 | 22 | 22 | 22 | 18 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 |
| kJ | 1100 | 953 | 871 | 759 | 616 | 536 | 536 | 456 | 373 | 360 | 360 | 303 | 303 | 444 | 431 | 379 | 494 | 486 | 384 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 15 | SW 15 | SSW 15 | SSW 15 | SW 14 | SW 14 | SE 6 | WSW 11 | WSW 11 | WSW 10 | SE 6 | SE 7 | SE 7 |
| kJ | — | — | — | — | — | — | 58 | 57 | 86 | 142 | 211 | 234 | 56 | 170 | 128 | 86 | 20 | 18 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 11 | SW 14 | SE 6 | SE 6 | SE 6 | S 16 | S 15 | S 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 85 | 186 | 39 | 25 | 19 | 5 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | ESE 6 | — | — | — | — | — | SSW 3 |
| kJ | 94 | 124 | 169 | 163 | 178 | 177 | 163 | 154 | 165 | 151 | 122 | 96 | 160 | — | — | — | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 27 | 37 | 37 | 30 | 30 | 30 | 26 | 25 | 25 | 25 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 3 | 5 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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