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Extensions Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Extensions surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Tuesday 21 Apr 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
19.4° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Extensions today?
The current surf forecast for Extensions at 11AM is: 3.5m 12s primary swell from a Southwest direction and 0.2m 18s secondary swell from a South-southwest direction (forecast issued at 07:00am April 21). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 11ft (3.5m) | 13s |
| Afternoon (21 Apr) | 13ft (4.0m) | 12s |
| Evening (21 Apr) | 13ft (4.0m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | Fri 24 | |||||||||||||||||||||
| 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 | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 | 15 | 15 | 16 | 16 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3883 | 3619 | 3621 | 4859 | 4275 | 4301 | 4670 | 6399 | 9971 | 11346 | 11643 | 11624 | 10734 | 9815 | 6938 | 6652 | 5252 | 4302 | 2866 | 2148 | 1699 | 1359 | 1044 | 762 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | off | off | cross- off | cross- off | off | off |
High Tide / height (m) | 6:10PM 1.33 | 6:30AM 1.30 | 7:13PM 1.22 | 7:41AM 1.15 | 8:40PM 1.14 | |||||||||||||||||||
Low Tide / height (m) | 11:56AM 0.19 | 12:17AM 0.34 | 12:51PM 0.34 | 1:27AM 0.46 | 2:07PM 0.46 | |||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Fri 24 | |||||||||||||||||||||
| Sunrise | - | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:13 | - | - | - |
 |  | | |  |  | | | |  |  | | |  | | | | | | | | | | | |
Rain (mm) | - | 1 | 3 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 17 | 16 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 14 | 14 | 18 | 21 | 20 | 19 | 18 |
| Feels °C (?) | 10 | 11 | 11 | 11 | 10 | 11 | 10 | 10 | 10 | 9 | 8 | 8 | 6 | 4 | 4 | 5 | 6 | 9 | 11 | 15 | 18 | 17 | 15 | 15 |
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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.
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