Surf Forecasts:
How big are the waves at Extensions today (21 Jul):
- Morning surf: Morning surf (21 Jul, local time) - 8ft (2.4m), 14s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Jul, local time) - 10ft (3.0m), 14s period with SW swell.
- Evening surf: Evening surf (21 Jul, local time) - 8ft (2.5m), 13s period with SW swell.
The current surf forecast for Extensions at 3AM is: 0.9m 16s primary swell from a South-southwest direction and 1.0m 7s secondary swell from a Southwest direction (forecast issued at 07:00pm July 20). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jul) | 8ft (2.4m) | 14s |
| Afternoon (21 Jul) | 10ft (3.0m) | 14s |
| Evening (21 Jul) | 8ft (2.5m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Thu morning. Very mild (max 15°C on Mon night, min 11°C on Thu morning). Winds increasing (calm on Tue morning, fresh winds from the N by Thu morning). | |||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 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) | WNW 10 | W 10 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | WSW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 176 | 125 | 334 | 382 | 665 | 2025 | 2725 | 3054 | 2802 | 2561 | 2114 | 1908 | 1643 | 1500 | 1404 | 1292 | 1125 | 1112 | 908 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | glassy | glassy | cross | cross | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:44PM1.31m | 8:12AM1.07m | 8:35PM1.19m | 9:19AM1.00m | 9:42PM1.11m | ||||||||||||||
Low Tide | 2:13AM0.43m | 2:07PM0.50m | 3:13AM0.51m | 3:11PM0.60m | |||||||||||||||
 |  |  | | |  |  | | | | | | | | | | | | | |
 | — | — | — | — | 7:47 | — | — | — | — | — | — | — | 7:46 | — | — | — | — | — | — |
 | 5:57 | — | — | — | — | — | — | — | 5:57 | — | — | — | — | — | — | — | 5:58 | — | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 13 |
Feels °C | 13 | 13 | 13 | 14 | 13 | 14 | 14 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 7 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | WSW 12 |
| kJ | 176 | 125 | 113 | 104 | 665 | 2025 | 2725 | 3054 | 2802 | 2561 | 2114 | 1908 | 1643 | 1500 | 1404 | 1292 | 1125 | 1112 | 908 |
Swell 2 Height (m) Direction Period (s) | SW 11 | W 10 | SSW 16 | SSW 16 | SSW 7 | W 9 | WNW 9 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 12 |
| kJ | 147 | 120 | 334 | 382 | 90 | 40 | 26 | 44 | 32 | 31 | 30 | 30 | 18 | 18 | 72 | 165 | 204 | 145 | 386 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 10 | W 10 | SW 12 | SSW 11 | SE 11 | SE 11 | W 9 | W 9 | — | — | — | — | — | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 14 |
| kJ | 80 | 84 | 117 | 244 | 143 | 60 | 60 | 14 | 14 | — | — | — | — | — | 12 | 12 | 12 | 12 | 18 |
Wind waves Height (m) Direction Period (s) | WNW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 3 | NW 4 | NW 4 | NNW 4 |
| kJ | 157 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 10 | 11 | 18 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 12 | 12 | 0 | 0 | 5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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