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Surf Forecasts:
Thermopylae surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 pm 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 2AM is: 4.0m 14s primary swell from a Southwest direction and 0.2m 12s secondary swell from a South-southeast direction (forecast issued at 07:00pm December 12). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 13ft (4.0m) | 14s |
| Afternoon (13 Dec) | 11ft (3.5m) | 13s |
| Evening (13 Dec) | 11ft (3.5m) | 13s |
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 | Monday 15 | |||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1956 | 2126 | 6580 | 6676 | 6777 | 5799 | 4657 | 4183 | 3997 | 3457 | 3191 | 2597 | 2281 | 1913 | 1775 | 1463 | 1305 | 1452 | 1491 | 1491 | 1787 | 2010 | 2010 | 2039 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | 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- on | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross | cross- on |
High Tide / height (m) | 10:14PM 1.27 | 10:40AM 1.46 | 11:27PM 1.29 | 11:41AM 1.48 | 12:24AM 1.35 | 12:30PM 1.51 | ||||||||||||||||||
Low Tide / height (m) | 4:20PM 0.75 | 4:15AM 0.79 | 5:26PM 0.72 | 5:22AM 0.78 | 6:18PM 0.67 | 6:16AM 0.75 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - |
| Sunset | 7:51 | - | - | - | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - |
 |  |  |  |  |  | | |  | | | | | | | | | | | | | | | | |
Rain (mm) | 1 | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 18 | 17 | 17 | 16 | 16 | 17 | 17 | 18 | 17 | 16 | 16 | 16 | 16 | 18 | 19 | 19 | 18 | 18 | 18 | 17 | 19 | 21 | 21 |
| Feels °C (?) | 15 | 15 | 14 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 14 | 14 | 15 | 16 | 15 | 15 | 17 | 17 | 16 | 18 | 20 | 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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