Thermopylae Surf Break

Lat Long: 33.90° S 18.40° E

Thermopylae Surf Forecast and Surf Report

Issued: 7 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Thermopylae sea temperature is
13.2° C
2.4° 

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


Thermopylae surf forecast from 15 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 11PM (local time) - 6.5ft (2.0m), 14s period, WSW swell with glassy winds.
  • Most powerful swell: Monday 17 Aug, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with 3,489 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 11PM (local time) - 6.5ft (2.0m), 14s 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 Saturday (Aug 15) at 11PM. The primary swell is predicted to be 2.0m and 14s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thermopylae in the next 16 days are 3.0m 14s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Friday (Aug 21) at 2AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sat 15th Aug)6.5ft (2.0m) 14s
Best Surf11PM (Sat 15th Aug)6.5ft (2.0m) 14s
Most Powerful 2AM (Mon 17th Aug)10ft (3.0m) 14s

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


Short Range Forecast

Mostly dry. Very mild (max 17°C on Mon afternoon, min 13°C on Sun morning). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Fri afternoon, min 12°C on Tue night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
3
4
3
4
3
3
3
4
4
2
4
4
2
4
4
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
WSW
13
2
WSW
14
2.2
WSW
14
3
WSW
14
2.5
WSW
13
2.4
WSW
13
2.2
WSW
13
1.8
WSW
12
2.4
SW
13
2.5
SW
12
2.5
SW
12
2.4
SW
12
2.2
SW
12
2.5
SW
12
3
SW
13
2.5
SW
12
2.2
SW
12
1.9
SW
11
1.7
SW
11
Wave Graph
Metric surfscale
Energy kJ
1444
1570
2053
3489
2528
2026
1599
901
1952
2044
1731
1605
1291
1771
2561
2103
1324
866
651
Wind (km/h)
5
NNW
15
N
10
NW
10
N
10
NNW
10
WNW
10
S
20
SSE
20
SSE
15
SSE
10
SSE
20
S
10
SSE
10
SSE
20
S
10
SE
0
ENE
15
WSW
15
N
Wind State
cross-on
cross
cross-on
cross
cross
on
cross
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross
cross-off
glassy
cross-on
cross
High Tide
5:27AM1.65m
5:47PM1.75m
6:03AM1.55m
6:22PM1.64m
6:39AM1.44m
6:59PM1.51m
7:19AM1.32m
7:41PM1.38m
8:14AM1.22m
8:42PM1.27m
9:53AM1.16m
10:27PM1.21m
Low Tide
11:26PM0.34m
11:29AM0.37m
00:00AM0.43m
12:02PM0.47m
00:36AM0.54m
12:35PM0.59m
1:15AM0.65m
1:14PM0.71m
2:05AM0.76m
2:09PM0.83m
3:29AM0.83m
3:59PM0.91m
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
7:20
7:20
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:16
6:16
6:17
6:19
6:19
6:20
 mm
Temp °C
15
15
16
15
16
17
16
15
15
13
14
16
14
15
16
14
16
18
14
Feels °C
13
12
13
14
14
16
17
12
11
9
12
13
11
13
12
11
15
16
13
  • 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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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.

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