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Thermopylae Surf Forecast
/ Cape Town (69 surf breaks) /
Thermopylae surfForecast / Cape Town / South Africa
12 Day Weather and Surf, issued 7 pm Tuesday 15 Jul 2025 SAST
Best Forecast Surf Conditions for Thermopylae this week:
The surf forecast for Thermopylae over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 16) at 2AM. The primary swell is predicted to be 3.5m and 17s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Thermopylae in the next 12 days are 5.5m 16s and forecast to arrive on Friday (Jul 18) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Tuesday (Jul 22) at 5AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 16th Jul) | 11ft (3.5m) 17s |
| Best Surf | 5AM (Fri 18th Jul) | 18ft (5.5m) 16s |
| Most Powerful | 2AM (Fri 18th Jul) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for Thermopylae over the next 12 days.
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sun 27 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 17 | 16 | 14 | 13 | 14 | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 13 | 12 | 13 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 19 | 18 | 16 | 15 | 14 | 9 | 9 | 14 | 13 | 13 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 6235 | 3841 | 3019 | 3124 | 5164 | 12858 | 14537 | 12220 | 8686 | 5497 | 3199 | 2412 | 1551 | 1188 | 1311 | 1189 | 5867 | 3952 | 1847 | 954 | 1078 | 444 | 341 | 291 | 743 | 1270 | 2244 | 1787 | 3924 | 1736 | 2825 | 2635 | 2838 | 6590 | 15569 | 14749 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross | on | on | cross- on | cross- off | cross- off | cross- off | off | cross | cross- off | glass | cross- on | on | cross | cross | cross- off | off | cross | off | off | cross- off | cross- off | glass | glass | cross- off | cross | cross | cross | cross | cross- on | cross- on | cross | cross |
High Tide / height (m) | 6:51AM 1.51 | 7:18PM 1.66 | 7:44AM 1.43 | 8:13PM 1.59 | 8:49AM 1.36 | 9:20PM 1.54 | 10:08AM 1.32 | 10:38PM 1.51 | 11:35AM 1.35 | 11:58PM 1.52 | 12:50PM 1.43 | 1:06AM 1.57 | 1:49PM 1.53 | 2:03AM 1.62 | 2:38PM 1.63 | 2:52AM 1.67 | 3:22PM 1.71 | 3:35AM 1.68 | 4:01PM 1.75 | 4:14AM 1.67 | 4:39PM 1.77 | 4:51AM 1.64 | 5:14PM 1.74 | |||||||||||||
Low Tide / height (m) | 12:49AM 0.48 | 12:53PM 0.49 | 1:43AM 0.53 | 1:46PM 0.56 | 2:47AM 0.58 | 2:52PM 0.64 | 4:04AM 0.61 | 4:13PM 0.69 | 5:24AM 0.59 | 5:39PM 0.68 | 6:36AM 0.54 | 6:55PM 0.62 | 7:36AM 0.46 | 7:56PM 0.54 | 8:26AM 0.39 | 8:48PM 0.46 | 9:09AM 0.35 | 9:33PM 0.41 | 9:48AM 0.32 | 10:14PM 0.39 | 10:24AM 0.33 | 10:51PM 0.40 | 10:57AM 0.36 | |||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sun 27 | |||||||||||||||||||||||||
| Sunrise | - | 7:48 | - | - | 7:48 | - | - | 7:48 | - | - | 7:47 | - | - | 7:47 | - | - | 7:46 | - | - | 7:46 | - | - | 7:45 | - | - | 7:45 | - | - | 7:43 | - | - | 7:43 | - | - | 7:43 | - |
| Sunset | - | - | 5:54 | - | - | 5:55 | - | - | 5:57 | - | - | 5:57 | - | - | 5:58 | - | - | 5:59 | - | - | 5:59 | - | - | 6:00 | - | - | 6:00 | - | - | 6:00 | - | - | 6:01 | - | - | 6:02 |
 |  |  |  |  | | | | | | | | | | |  | | |  | | | | | | | | | | | | |  | | | | | |
Rain (mm) | - | - | - | 6 | 7 | - | 1 | - | - | - | - | - | - | - | - | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 5 | 7 | 2 | 2 |
| Temp. °C | 14 | 13 | 15 | 14 | 15 | 15 | 15 | 13 | 14 | 13 | 14 | 17 | 16 | 14 | 15 | 14 | 13 | 13 | 13 | 9 | 12 | 13 | 15 | 18 | 16 | 16 | 18 | 16 | 15 | 17 | 14 | 14 | 14 | 14 | 14 | 14 |
| Feels °C (?) | 12 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 14 | 12 | 13 | 13 | 10 | 6 | 7 | 7 | 6 | 9 | 10 | 12 | 14 | 12 | 14 | 16 | 14 | 12 | 13 | 10 | 3 | 5 | 5 | 7 | 8 |
Short Range Forecast: Moderate rain (total 14mm), heaviest on Wed night. Very mild (max 15°C on Wed afternoon, min 11°C on Wed morning). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Sun night. Very mild (max 17°C on Sat afternoon, min 12°C on Fri night). Winds increasing (calm on Sun morning, fresh winds from the SW by Sun night). | Days 6-9 Weather Summary Mostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Tue morning). Wind will be generally light. | Long Range Forecast: Moderate rain (total 18mm), heaviest on Sat afternoon. Very mild (max 17°C on Fri afternoon, min 12°C on Fri night). Winds increasing (calm on Thu night, near gales from the NNW by Sat morning). | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Cape Town
Continuing clean conditions at Thermopylae (calm at Observatory wx 8 km from Thermopylae). 2.5m 13s groundswell from the SW with a 2.5m 13s groundswell from the SW and a 1.7m 17s long period groundswell, also from the SW. Swells combining to make to make bigger set waves.
1 h 3 min ago
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.
Information about the Thermopylae Surf forecast
The above surf forecast table for Thermopylae provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Thermopylae can be found by selecting the local surf guide option on the grey menu. Our Thermopylae surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Thermopylae) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Thermopylae may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Cape Town? If you are looking for accommodation near Thermopylae, camping, hotels and holiday cottages in Cape Town, consider staying in Cape Town which is 8 km (5 miles) away. Other places in and around Cape Town where you can find information about places to rent, and car hire include Robben Island which is 11 km (7 miles) away, Bellville, Atlantis and Kayamnandi.
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