Surf Forecasts:
How big are the waves at Extensions today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 7ft (2.1m), 11s period with SW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 5ft (1.5m), 11s period with WSW swell.
- Evening surf: Evening surf (21 Aug, local time) - 4.5ft (1.3m), 11s period with WSW swell.
The current surf forecast for Extensions at 1PM is: 1.5m 11s primary swell from a West-southwest direction and 1.2m 11s secondary swell from a South-southwest direction (forecast issued at 07:00am August 21). An open ocean swell of 1.1m 5s 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 Aug) | 7ft (2.1m) | 11s |
| Afternoon (21 Aug) | 5ft (1.5m) | 11s |
| Evening (21 Aug) | 4.5ft (1.3m) | 11s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 15°C on Fri night, min 12°C on Fri morning). Winds decreasing (fresh winds from the SE on Fri morning, calm by Sat night). | |||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||||||||
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 | 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 11 | SW 11 | WSW 11 | WSW 11 | WSW 11 | S 10 | SSW 10 | WSW 11 | SSW 13 | SSW 12 | SSW 13 | SW 11 | SW 11 | SW 11 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 1291 | 1054 | 947 | 527 | 458 | 419 | 468 | 392 | 291 | 551 | 534 | 504 | 836 | 1171 | 1171 | 2218 | 1979 | 1561 | 1648 | 1574 | 1694 | 1159 | 985 |
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 | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 9:44AM0.92m | 10:23PM0.98m | 11:55AM0.96m | 00:07AM1.03m | 12:59PM1.06m | ||||||||||||||||||
Low Tide | 3:16AM0.63m | 3:46PM0.71m | 5:32AM0.62m | 6:06PM0.66m | 6:47AM0.52m | 7:07PM0.56m | |||||||||||||||||
 |  | | | |  |  | | | | |  | | | | | | | | | | | | |
 | 7:18 | — | — | — | — | — | — | — | 7:18 | — | — | — | — | — | — | — | 7:16 | — | — | — | — | — | — |
 | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:21 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 12 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 |
Feels °C | 6 | 6 | 6 | 8 | 8 | 12 | 11 | 12 | 12 | 11 | 11 | 10 | 12 | 14 | 16 | 13 | 12 | 11 | 11 | 10 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | 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 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
| kJ | 1291 | 1054 | 947 | 527 | 458 | 419 | 468 | 392 | 274 | 551 | 534 | 504 | 836 | 1171 | 1171 | 2218 | 1979 | 1561 | 1648 | 1574 | 1694 | 1159 | 985 |
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 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | — | SSW 11 | SSW 11 |
| kJ | — | — | — | 322 | 310 | 304 | 366 | 291 | 291 | 216 | 198 | 206 | 26 | 97 | 275 | 184 | 180 | 305 | 234 | 226 | — | 286 | 366 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 14 | SSW 14 | SE 4 | — | W 17 | — | NNW 3 | — | WSW 11 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 81 | 161 | 1 | — | 6 | — | 2 | — | 140 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 5 | SE 5 | SE 5 | SSE 5 | SSE 5 | SE 5 | — | — | — | NNW 2 | NNW 3 | NNW 3 | — | — | — | — | — | — | — | — | — | — |
| kJ | 24 | 54 | 56 | 49 | 61 | 54 | 42 | — | — | — | 1 | 5 | 6 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 27 | 26 | 25 | 27 | 27 | 12 | 26 | 3 | 1 | 1 | 1 | 24 | 1 | 1 | 0 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 12 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||||
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