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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 1 pm Monday 20 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
16.4° C
(Which is 1.4°C colder than average for this time of year)How big are the waves at Thermopylae today?
The current surf forecast for Thermopylae at 9PM is: 4.0m 14s primary swell from a Southwest direction (forecast issued at 01:00pm April 20). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 15ft (4.5m) | 13s |
| Afternoon (20 Apr) | 15ft (4.5m) | 14s |
| Evening (20 Apr) | 13ft (4.0m) | 14s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| 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 | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 7364 | 6937 | 6451 | 5502 | 4767 | 3943 | 3409 | 3159 | 3104 | 4420 | 4025 | 3972 | 4301 | 5697 | 8760 | 10444 | 11147 | 11009 | 10221 | 8970 | 7372 | 5768 | 4555 | 3911 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross- on | on | cross- on | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off |
High Tide / height (m) | 5:26PM 1.71 | 5:42AM 1.71 | 6:16PM 1.60 | 6:35AM 1.55 | 7:17PM 1.49 | 7:45AM 1.39 | ||||||||||||||||||
Low Tide / height (m) | 11:12AM 0.32 | 11:28PM 0.47 | 11:58AM 0.45 | 12:22AM 0.60 | 12:54PM 0.59 | 1:36AM 0.72 | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:13 |
| Sunset | - | - | 6:17 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - |
 |  |  |  |  | | | | | |  |  | |  | |  | | | | | | | | | |
Rain (mm) | 1 | 1 | - | 1 | - | - | - | 1 | 1 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 16 | 16 | 15 | 16 | 18 | 18 | 17 | 14 | 13 | 13 | 14 |
| Feels °C (?) | 11 | 11 | 10 | 12 | 12 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 11 | 12 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 11 | 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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