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Surf Forecasts:
Thermopylae surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Friday 12 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
15.1° C
(Which is 3.9°C colder than average for this time of year)How big are the waves at Thermopylae today?
The current surf forecast for Thermopylae at 12PM is: 1.6m 16s primary swell from a Southwest direction and 1.2m 8s secondary swell from a West-southwest direction, 1.1m 5s secondary swell from a Northwest direction (forecast issued at 07:00am December 12). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4.5ft (1.4m) | 17s |
| Afternoon (12 Dec) | 5.5ft (1.7m) | 16s |
| Evening (12 Dec) | 7ft (2.1m) | 16s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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) (?) | 18 | 17 | 17 | 16 | 10 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 572 | 885 | 1245 | 1486 | 1611 | 2203 | 6580 | 6770 | 6397 | 5968 | 4862 | 4323 | 3997 | 3457 | 3191 | 2597 | 2281 | 1913 | 1775 | 1463 | 1328 | 1427 | 1401 | 1491 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross- off | cross- off |
High Tide / height (m) | 9:31AM 1.47 | 10:14PM 1.27 | 10:40AM 1.46 | 11:27PM 1.29 | 11:41AM 1.48 | 12:24AM 1.35 | ||||||||||||||||||
Low Tide / height (m) | 3:01AM 0.76 | 4:20PM 0.75 | 4:15AM 0.79 | 5:26PM 0.72 | 5:22AM 0.78 | 6:18PM 0.67 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:52 | - | - | - |
 |  | |  |  | |  |  | | |  | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | 3 | 1 | - | 1 | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 18 | 19 | 17 | 18 | 17 | 17 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 19 | 19 | 19 | 19 | 18 |
| Feels °C (?) | 15 | 14 | 14 | 14 | 15 | 13 | 12 | 11 | 12 | 13 | 13 | 14 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 17 | 18 | 17 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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