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:
Thermopylae surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Sunday 21 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Thermopylae surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thermopylae sea temperature is
15.5° C
(Which is 3.8°C colder than average for this time of year)Nearby Cam: 5km away, Clifton 4th beach webcam Live Stream, Cape Town
How big are the waves at Thermopylae today?
The current surf forecast for Thermopylae at 10AM is: 1.1m 12s primary swell from a Southwest direction and 1.1m 11s secondary swell from a South-southwest direction, 1.3m 7s secondary swell from a South-southeast direction (forecast issued at 07:00am December 21). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Dec) | 4.5ft (1.3m) | 12s |
| Afternoon (21 Dec) | 5ft (1.6m) | 11s |
| Evening (21 Dec) | 6.5ft (2.0m) | 8s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 21 | Monday 22 | Tuesday 23 | Wed 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) (?) | 12 | 12 | 12 | 11 | 7 | 8 | 8 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 6 | 10 | 10 | 7 | 6 | 6 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 925 | 429 | 349 | 611 | 475 | 501 | 419 | 360 | 347 | 297 | 292 | 292 | 258 | 258 | 189 | 178 | 149 | 154 | 204 | 214 | 170 | 207 | 130 | 365 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | cross- on | cross | cross- off | cross | cross | cross | cross | cross | cross | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:02AM 1.63 | 4:01PM 1.62 | 4:34AM 1.64 | 4:36PM 1.60 | 5:08AM 1.65 | 5:12PM 1.57 | ||||||||||||||||||
Low Tide / height (m) | 9:59AM 0.60 | 10:14PM 0.44 | 10:34AM 0.59 | 10:46PM 0.46 | 11:11AM 0.60 | 11:21PM 0.49 | ||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wed 24 | |||||||||||||||||||||
| Sunrise | - | 5:31 | - | - | - | - | - | - | - | 5:31 | - | - | - | - | - | - | - | 5:31 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:55 | - | - | - | - | - | - | - | 7:57 | - | - | - | - | - | - | - | 7:57 | - | - | - |
 |  | | | | | | | | | | |  |  |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 20 | 25 | 27 | 26 | 24 | 22 | 21 | 20 | 22 | 24 | 24 | 24 | 22 | 21 | 21 | 21 | 21 | 22 | 22 | 21 | 20 | 19 | 19 |
| Feels °C (?) | 17 | 19 | 24 | 25 | 24 | 22 | 21 | 21 | 20 | 23 | 24 | 25 | 24 | 21 | 19 | 20 | 20 | 19 | 19 | 19 | 17 | 17 | 14 | 15 |
- 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thermopylae 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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