Surf Forecasts:
How big are the waves at Extensions today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 8ft (2.5m), 12s period with WSW swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 8ft (2.5m), 13s period with SW swell.
- Evening surf: Evening surf (18 Aug, local time) - 10ft (3.0m), 12s period with SW swell.
The current surf forecast for Extensions at 1AM is: 2.3m 13s primary swell from a West-southwest direction and 0.9m 14s secondary swell from a Southwest direction (forecast issued at 07:00pm August 17). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | 8ft (2.5m) | 12s |
| Afternoon (18 Aug) | 8ft (2.5m) | 13s |
| Evening (18 Aug) | 10ft (3.0m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Mon night. Very mild (max 15°C on Mon night, min 12°C on Tue night). Winds decreasing (fresh winds from the SE on Tue night, calm by Wed night). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||
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 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 2354 | 2449 | 2279 | 1816 | 1974 | 2001 | 1197 | 2063 | 2859 | 2846 | 2924 | 2744 | 2454 | 2196 | 1978 | 1978 | 1742 | 1576 | 1693 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | glassy | glassy |
High Tide | 6:12PM1.43m | 6:31AM1.21m | 6:47PM1.29m | 7:10AM1.10m | 7:27PM1.16m | ||||||||||||||
Low Tide | 00:31AM0.30m | 12:29PM0.37m | 1:07AM0.42m | 1:04PM0.50m | |||||||||||||||
 |  |  | | |  |  | | | | | | | | | | | |  | |
 | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — |
 | 6:15 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:17 | — | — |
mm | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 15 |
Feels °C | 13 | 14 | 13 | 14 | 13 | 12 | 12 | 11 | 9 | 7 | 7 | 7 | 8 | 9 | 11 | 11 | 12 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
| kJ | 2354 | 2449 | 2279 | 1816 | 1974 | 2001 | 1197 | 2063 | 2859 | 2846 | 2924 | 2744 | 2454 | 2196 | 1978 | 1978 | 1742 | 1576 | 1693 |
Swell 2 Height (m) Direction Period (s) | WSW 16 | E 10 | E 10 | SW 14 | WSW 13 | E 11 | SW 13 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 211 | 8 | 8 | 304 | 69 | 2 | 837 | 519 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 16 | — | — | E 11 | — | — | E 11 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 65 | — | — | 9 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SSE 3 | ESE 3 | ESE 4 | ESE 4 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 7 | 8 | 12 | 13 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 1 | 1 | 1 | 3 | 0 | 0 | 12 | 12 | 37 | 33 | 12 | 12 | 26 | 12 | 1 | 1 | 0 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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