Surf Forecasts:
How big are the waves at Extensions today (18 Jul):
- Morning surf: Morning surf (18 Jul, local time) - 4.5ft (1.4m), 9s period with SW swell.
- Afternoon surf: Afternoon surf (18 Jul, local time) - 3.5ft (1.1m), 13s period with SW swell.
- Evening surf: Evening surf (18 Jul, local time) - 5ft (1.6m), 12s period with SW swell.
The current surf forecast for Extensions at 1PM is: 1.4m 9s primary swell from a Southwest direction and 0.9m 13s secondary swell from a Southwest direction, 0.2m 2s secondary swell from a North-northwest direction (forecast issued at 07:00am July 18). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jul) | 4.5ft (1.4m) | 9s |
| Afternoon (18 Jul) | 3.5ft (1.1m) | 13s |
| Evening (18 Jul) | 5ft (1.6m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Very mild (max 17°C on Sat afternoon, min 13°C on Mon morning). Wind will be generally light. | |||||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||||||||
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 9 | SW 9 | SW 9 | WSW 9 | SW 13 | SW 12 | SW 12 | SW 12 | WSW 12 | WSW 12 | WSW 12 | SW 11 | SW 9 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 8 | SW 10 | SSW 16 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 241 | 266 | 328 | 290 | 352 | 888 | 799 | 772 | 952 | 769 | 1119 | 1019 | 686 | 1029 | 1154 | 1028 | 869 | 639 | 481 | 334 | 201 | 124 | 334 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | glassy | cross | cross | cross | cross | on | on | on | cross-on |
High Tide | 6:19PM1.52m | 6:36AM1.28m | 7:00PM1.42m | 7:21AM1.17m | 7:44PM1.31m | ||||||||||||||||||
Low Tide | 12:00PM0.15m | 00:39AM0.24m | 12:39PM0.27m | 1:24AM0.34m | 1:20PM0.39m | ||||||||||||||||||
 |  |  |  | |  | | | | |  |  | | | | | | | | | | | | |
 | 7:48 | — | — | — | — | — | — | — | 7:48 | — | — | — | — | — | — | — | 7:48 | — | — | — | — | — | — |
 | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:55 | — | — | — | — | — | — | — | 5:57 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 16 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 14 | 14 | 14 | 14 |
Feels °C | 15 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 12 | 12 | 11 | 13 | 13 | 13 | 13 | 12 | 11 | 12 | 11 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | WSW 9 | WSW 9 | SW 12 | SW 12 | SW 12 | SW 12 | WSW 12 | WSW 12 | SW 11 | SW 9 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 8 | SW 8 | SSW 16 |
| kJ | 241 | 266 | 328 | 276 | 270 | 888 | 799 | 772 | 706 | 769 | 835 | 1019 | 686 | 1029 | 1154 | 1028 | 869 | 639 | 481 | 334 | 201 | 90 | 334 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | S 12 | S 11 | SW 13 | SW 13 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | SW 11 | SW 10 | SW 8 |
| kJ | 72 | 178 | 163 | 290 | 352 | 166 | 244 | 191 | 188 | 184 | 143 | 133 | 75 | 96 | 94 | 94 | 94 | 123 | 121 | 92 | 155 | 124 | 71 |
Swell 3 Height (m) Direction Period (s) | S 12 | SW 14 | SW 14 | S 11 | S 11 | S 10 | S 10 | S 10 | SSE 11 | SSE 11 | SSE 10 | S 10 | SSE 10 | SSW 14 | SSE 10 | SE 9 | SE 10 | SE 9 | SE 9 | SE 9 | W 10 | W 10 | W 10 |
| kJ | 106 | 130 | 228 | 110 | 151 | 138 | 100 | 138 | 119 | 117 | 83 | 52 | 33 | 71 | 31 | 22 | 23 | 31 | 30 | 22 | 90 | 90 | 89 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNW 2 | NW 3 | — | NW 3 | NNW 3 | WSW 12 | NNW 3 | WSW 12 | WSW 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | 2 | — | 2 | 4 | 952 | 2 | 1119 | 581 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 24 | 35 | 1 | 5 | 1 | 1 | 0 | 1 | 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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