Thermopylae Surf Break

Lat Long: 33.90° S 18.40° E

Thermopylae Surf Forecast and Surf Report

Issued: 1 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thermopylae sea temperature is
13.4°C
2.2° 

Thermopylae surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Thermopylae surf forecast from 23 Aug 2026:

  • Best quality surf: Sunday 23 Aug, 8PM (local time) - 6ft (1.9m), 12s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Sunday 30 Aug, 8PM (local time) - 11ft (3.5m), 13s period, W swell with 4,660 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 8PM (local time) - 6ft (1.9m), 12s period with WSW swell.

Best Forecast Surf Conditions for Thermopylae this week:

The surf forecast for Thermopylae over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 8PM. The primary swell is predicted to be 1.9m and 12s period with a secondary swell of 1.1m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Thermopylae in the next 16 days are 3.5m 13s and forecast to arrive on Sunday (Aug 30) at 8PM. 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 (Aug 25) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sun 23rd Aug)6ft (1.9m) 12s
Best Surf 8PM (Sun 23rd Aug)6ft (1.9m) 12s
Most Powerful 8PM (Sun 30th Aug)11ft (3.5m) 13s

Table - best surf conditions forecast for Thermopylae over the next 16 days.


Short Range Forecast

Mostly dry. Very mild (max 17°C on Tue afternoon, min 11°C on Mon night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Fri afternoon, min 16°C on Thu morning). Winds increasing (calm on Thu night, fresh winds from the NNW by Sat morning).

Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
4
2
2
3
3
2
3
4
4
3
2
3
3
2
3
3
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
WSW
12
2.1
WSW
12
1.7
WSW
11
1.2
WSW
11
2.2
SW
14
2.4
SW
14
2.2
SW
14
1.8
WSW
13
2.3
SE
8
2.1
SE
8
1.1
SSW
11
1.4
SSW
11
1.3
S
11
1.3
S
11
1.1
S
11
1.1
WSW
14
1.2
WSW
14
1.2
WSW
13
1.2
WSW
12
1.8
WSW
14
Wave Graph
Metric surfscale
Energy kJ
1507
1236
724
370
1956
2233
1748
1134
601
528
320
513
418
410
274
439
534
484
433
1267
Wind (km/h)
15
S
15
SSE
15
SSE
20
SSE
20
SSE
20
SSE
30
SSE
20
SE
15
ESE
10
SE
10
NNE
15
NNW
10
NW
10
SSE
15
SSE
15
SSE
15
NNE
30
NNW
30
NNW
25
NNW
Wind State
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross
High Tide
1:08AM1.34m
1:42PM1.42m
1:47AM1.44m
2:13PM1.53m
2:20AM1.53m
2:41PM1.63m
2:51AM1.61m
3:09PM1.72m
3:20AM1.67m
3:36PM1.78m
3:50AM1.71m
4:05PM1.82m
4:21AM1.72m
Low Tide
7:07PM0.78m
7:23AM0.64m
7:47PM0.67m
7:57AM0.54m
8:19PM0.57m
8:27AM0.46m
8:48PM0.47m
8:55AM0.38m
9:17PM0.38m
9:23AM0.33m
9:46PM0.32m
9:52AM0.30m
10:15PM0.29m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:15
7:13
7:13
7:11
7:09
7:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:21
6:22
6:22
6:22
6:23
6:24
6:25
 mm
2
Temp °C
15
13
14
16
13
14
17
16
16
23
21
18
18
16
20
24
23
20
18
15
Feels °C
13
10
11
13
9
10
12
12
13
21
19
15
16
16
17
20
20
15
13
12
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Thermopylae:

join our community of surf reporters

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 16 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.

Nearest locationNearest