- Forecast
- Maps
- Live
- Weather State
- Spot Information
Extensions Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Extensions surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Wednesday 20 May 2026 SASTForecast update in hr min s Forecast update imminent
Extensions surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Extensions sea temperature is
16.7° C
(Which is slightly cooler than normal)How big are the waves at Extensions today?
The current surf forecast for Extensions at 6AM is: 0.9m 12s primary swell from a West-southwest direction (forecast issued at 01:00am May 20). An open ocean swell of 0.6m 12s is not directed at the surf break, a second open ocean swell of 2.4m 9s 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 May) | 2.5ft (0.8m) | 12s |
| Afternoon (20 May) | 2.5ft (0.7m) | 12s |
| Evening (20 May) | 2ft (0.6m) | 11s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Warm (max 20°C on Wed afternoon, min 16°C on Thu night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Wed night). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 20 | SW 12 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | |
260 | 226 | 184 | 180 | 123 | 119 | 81 | 68 | 121 | 113 | 140 | 199 | 175 | 136 | 144 | 227 | 314 | 311 | 427 | 504 | 498 | 486 | 733 | 757 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-off | cross-off | |
High Tide | 5:34AM1.43m | 6:11PM1.39m | 6:31AM1.30m | 7:12PM1.32m | 7:37AM1.17m | 8:23PM1.26m | ||||||||||||||||||
Low Tide | 11:26PM0.22m | 11:53AM0.18m | 00:24AM0.31m | 12:48PM0.29m | 1:33AM0.40m | 1:52PM0.39m | ||||||||||||||||||
 | |  | | | |  |  | | | | | | | | | | |  |  | | | | | |
 | — | 7:35 | — | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:49 | — | — | — | — | — | — | — | 5:49 | — | — | — | — | — | — | — | 5:47 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | |
Temp °C | 17 | 17 | 17 | 17 | 18 | 20 | 20 | 19 | 19 | 18 | 17 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 |
10 | 10 | 12 | 13 | 16 | 18 | 18 | 18 | 20 | 17 | 15 | 16 | 15 | 13 | 15 | 14 | 14 | 13 | 13 | 13 | 15 | 16 | 17 | 16 | |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 12 | WSW 12 | SE 9 | SE 9 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SW 12 | SW 12 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SSW 6 | SW 15 | SW 15 |
 kJ | 260 | 226 | 184 | 180 | 399 | 371 | 281 | 219 | 171 | 126 | 113 | 110 | 91 | 66 | 144 | 137 | 314 | 311 | 427 | 504 | 498 | 117 | 733 | 757 |
Swell 2 Height (m) Direction Period (s) | — | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SSE 11 | WSW 11 | WSW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SSE 8 | SSE 7 | SW 11 | SW 11 | S 7 | SSW 6 | SSW 6 | SW 16 | SSW 6 | SSW 6 |
| kJ | — | 101 | 85 | 111 | 157 | 109 | 81 | 68 | 121 | 113 | 140 | 199 | 175 | 116 | 51 | 48 | 126 | 101 | 39 | 49 | 80 | 486 | 113 | 85 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 16 | SSW 16 | WSW 12 | WSW 12 | SSE 11 | SSE 11 | WSW 11 | WSW 11 | WSW 11 | SSE 11 | SW 20 | SW 20 | SW 20 | SW 19 | SSE 7 | SSE 6 | SW 11 | SW 11 | WSW 10 | WSW 11 | ESE 8 | ESE 8 |
| kJ | — | — | 11 | 25 | 123 | 119 | 84 | 49 | 47 | 46 | 23 | 11 | 65 | 136 | 134 | 227 | 26 | 13 | 79 | 82 | 97 | 99 | 20 | 11 |
Wind waves Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | — | — | — | — | NW 2 | NNW 3 | NNW 3 | NW 3 | NW 3 | NNW 3 | NNW 4 | NNW 4 | N 4 | N 4 | — | — | — |
| kJ | 1435 | 1064 | 720 | 535 | 1149 | 1019 | 780 | — | — | — | — | 1 | 3 | 8 | 6 | 5 | 7 | 16 | 16 | 10 | 6 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 30 | 30 | 26 | 18 | 0 | 12 | 12 | 0 | 0 | 1 | 1 | 1 | 1 | 20 | 1 | 1 | 23 | 26 | 26 | 25 | 1 | 1 | 0 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Extensions surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest