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Thermopylae Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Thermopylae surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Saturday 18 Apr 2026 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
16.7° C
(Which is 1.1°C colder than average for this time of year)How big are the waves at Thermopylae today?
The current surf forecast for Thermopylae at 2PM is: 3.0m 11s primary swell from a Southwest direction and 1.4m 5s secondary swell from a Northwest direction (forecast issued at 07:00am April 18). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 11ft (3.5m) | 12s |
| Afternoon (18 Apr) | 10ft (3.0m) | 12s |
| Evening (18 Apr) | 8ft (2.5m) | 13s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| 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 | 11 | 11 | 13 | 13 | 13 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 11 | 11 | 12 | 13 | 14 | 14 | 14 | 14 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3359 | 3503 | 2889 | 2358 | 1475 | 2021 | 2349 | 839 | 589 | 581 | 1178 | 3428 | 3798 | 3997 | 4465 | 4647 | 4731 | 5681 | 7021 | 6650 | 6158 | 5353 | 4595 | 3943 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- on | cross- on | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 3:34AM 1.96 | 4:01PM 1.83 | 4:14AM 1.92 | 4:42PM 1.79 | 4:56AM 1.84 | 5:26PM 1.71 | ||||||||||||||||||
Low Tide / height (m) | 9:51AM 0.19 | 10:02PM 0.30 | 10:30AM 0.23 | 10:43PM 0.36 | 11:12AM 0.32 | 11:28PM 0.47 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| Sunrise | - | 7:09 | - | - | - | - | - | - | - | 7:11 | - | - | - | - | - | - | - | 7:11 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:20 | - | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:17 | - | - | - |
 |  |  | | |  | | |  |  |  |  | | | | | | | |  | | | | | |
Rain (mm) | - | - | - | - | - | 1 | 1 | 2 | 1 | 3 | 2 | 4 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | - | - | 1 | 1 | 1 |
| Temp. °C | 16 | 16 | 16 | 17 | 16 | 16 | 15 | 14 | 14 | 15 | 17 | 16 | 15 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 16 | 16 | 15 |
| Feels °C (?) | 12 | 12 | 11 | 11 | 10 | 11 | 11 | 10 | 9 | 9 | 9 | 7 | 6 | 4 | 5 | 6 | 7 | 10 | 10 | 10 | 10 | 11 | 12 | 12 |
- Map Icons:
Break
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 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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