Surf Forecasts:
How big are the waves at Extensions today (20 Aug):
- Afternoon surf: Afternoon surf (20 Aug, local time) - 10ft (3.0m), 13s period with SW swell.
- Evening surf: Evening surf (20 Aug, local time) - 8ft (2.5m), 12s period with SW swell.
The current surf forecast for Extensions at 11PM is: 2.5m 12s primary swell from a Southwest direction (forecast issued at 07:00pm August 20). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | - | - |
| Afternoon (20 Aug) | 10ft (3.0m) | 13s |
| Evening (20 Aug) | 8ft (2.5m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 12°C on Thu night). Winds decreasing (fresh winds from the SE on Fri morning, light winds from the W by Sat night). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 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) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 11 | WSW 11 | S 10 | S 10 | SSW 10 | WSW 11 | SSW 13 | SSW 12 | SSW 13 | SW 11 | SW 11 | SW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 2536 | 2185 | 1835 | 1610 | 1374 | 1127 | 947 | 527 | 458 | 476 | 468 | 392 | 291 | 551 | 534 | 469 | 947 | 1193 | 1293 |
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 | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 8:29PM1.04m | 9:44AM0.92m | 10:23PM0.98m | 11:55AM0.96m | |||||||||||||||
Low Tide | 3:16AM0.63m | 3:46PM0.71m | 5:32AM0.62m | 6:06PM0.66m | |||||||||||||||
 |  | | | | | | | |  |  | | | | |  |  | | | |
 | — | — | — | — | 7:18 | — | — | — | — | — | — | — | 7:18 | — | — | — | — | — | — |
 | 6:19 | — | — | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:20 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 15 | 15 |
Feels °C | 10 | 9 | 8 | 8 | 7 | 6 | 6 | 9 | 9 | 11 | 11 | 12 | 12 | 10 | 11 | 11 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 11 | WSW 11 | WSW 11 | S 10 | SSW 10 | SSW 10 | SSW 13 | SSW 12 | SSW 13 | SW 11 | SW 11 | SW 11 |
| kJ | 2536 | 2185 | 1835 | 1610 | 1374 | 1127 | 947 | 527 | 458 | 419 | 468 | 392 | 274 | 551 | 534 | 469 | 947 | 1193 | 1293 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 11 | SSW 10 | SSW 10 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | WSW 10 | WSW 16 | WSW 16 | WSW 15 |
| kJ | — | — | — | — | — | — | — | 322 | 310 | 352 | 366 | 291 | 291 | 216 | 214 | 206 | 26 | 98 | 249 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 14 | SSW 14 | ESE 4 | — | W 17 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 81 | 161 | 1 | — | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | ESE 3 | SE 4 | SE 4 | SE 5 | SE 5 | SSE 5 | S 10 | SE 5 | — | — | WSW 3 | NW 2 | NNW 3 | — | — | — |
| kJ | — | — | 5 | 6 | 19 | 38 | 56 | 43 | 40 | 476 | 33 | — | — | 3 | 1 | 5 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 26 | 30 | 27 | 27 | 27 | 27 | 25 | 27 | 26 | 26 | 26 | 20 | 1 | 20 | 1 | 1 | 1 | 1 | 5 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
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