Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Extensions surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Tuesday 30 Dec 2025 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
18.1° C
(Which is 1.5°C colder than average for this time of year)How big are the waves at Extensions today?
The current surf forecast for Extensions at 5AM is: 0.6m 9s primary swell from a West-southwest direction and 0.4m 3s secondary swell from a North direction (forecast issued at 01:00am December 30). An open ocean swell of 0.7m 6s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Dec) | 2.5ft (0.7m) | 10s |
| Afternoon (30 Dec) | 3.5ft (1.0m) | 11s |
| Evening (30 Dec) | 3ft (0.9m) | 10s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 30 | Wednesday 31 | Thursday 01 | ||||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 9 | 9 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 10 | 11 | 10 | 10 | 14 | 10 | 13 | 13 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 53 | 53 | 55 | 78 | 186 | 183 | 210 | 184 | 184 | 163 | 163 | 177 | 233 | 224 | 386 | 194 | 200 | 200 | 179 | 261 | 330 | 721 | 585 | 540 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | cross | glass | glass | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- off |
High Tide / height (m) | 11:11PM 1.13 | 11:29AM 1.34 | 12:23AM 1.21 | 12:37PM 1.41 | 1:24AM 1.31 | 1:36PM 1.48 | ||||||||||||||||||
Low Tide / height (m) | 5:05AM 0.46 | 6:09PM 0.28 | 6:22AM 0.39 | 7:11PM 0.19 | 7:26AM 0.30 | |||||||||||||||||||
Tuesday 30 | Wednesday 31 | Thursday 01 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:37 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:00 | - | - | - | - | - | - | - | 8:00 | - | - | - | - | - | - | - | 8:00 |
 | | |  | |  | | |  | | | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 22 | 20 | 19 | 20 | 20 | 20 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 21 | 21 | 21 |
| Feels °C (?) | 26 | 23 | 21 | 20 | 22 | 20 | 20 | 21 | 21 | 21 | 22 | 23 | 22 | 21 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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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