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Surf Forecasts:

Thermopylae surf break

Thermopylae surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Wednesday 19 Nov 2025 SAST
Forecast 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
12.4° C
 (Which is 5.3°C colder than average for this time of year)

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 Saturday (Nov 22) at 8AM. The primary swell is predicted to be 1.5m and 12s period with a secondary swell of 0.6m and 11s. Another secondary swell of 1.8m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Thermopylae in the next 12 days are 3.0m 14s and forecast to arrive on Friday (Nov 21) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Nov 19) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sat 22nd Nov)5ft (1.5m) 12s
Best Surf 8AM (Sat 22nd Nov)5ft (1.5m) 12s
Most Powerful 5AM (Fri 21st Nov)10ft (3.0m) 14s

Table - best surf conditions forecast for Thermopylae over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Warm (max 24°C on Sat morning, min 16°C on Wed night). Winds decreasing (fresh winds from the SSE on Thu afternoon, light winds from the SE by Sat morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Sat afternoon, min 16°C on Mon night). Winds decreasing (strong winds from the S on Sun afternoon, light winds from the SSE by Tue morning).

Wed
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
2
3
2
2
2
1
3
2
2
2
1
1
3
2
1
2
2
0
3
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
SW
1.7
SW
2.4
SW
2.5
SW
2.5
SW
2.3
SW
2
SW
1.8
SW
1.5
SW
2.4
S
2.2
S
1.4
SW
1.2
SW
1.7
WSW
1.8
SW
1.9
SW
1.7
WSW
1.4
SW
1.2
SW
1.6
SW
1.6
SW
Period(s) (?)1215161515141312127712161514141313121513
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5551314273225622562183013199446355534174987481238130314389186044281108892
Wind
(km/h)
35
SSE
25
SSE
30
SSE
40
SSE
25
SSE
25
SSE
40
SSE
20
SE
20
S
35
SSE
20
SSE
40
S
40
SSE
20
SSE
20
S
30
S
20
SSE
15
S
25
S
20
SSE
20
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscrosscross-
off		crosscrosscross-
off		cross-
off
High Tide
/ height (m)
2:41PM
1.69
3:09AM
1.62
3:10PM
1.68
3:38AM
1.62
3:38PM
1.66
4:09AM
1.60
4:08PM
1.62
4:40AM
1.57
4:39PM
1.56
5:15AM
1.54
5:15PM
1.49
5:54AM
1.50
5:58PM
1.42
6:42AM
1.47
Low Tide
/ height (m)
8:56PM
0.41
9:01AM
0.54
9:23PM
0.40
9:31AM
0.56
9:51PM
0.42
10:01AM
0.59
10:20PM
0.45
10:34AM
0.63
10:52PM
0.50
11:11AM
0.68
11:28PM
0.56
11:56AM
0.72
12:10AM
0.63
12:54PM
0.77
Wed
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Sunrise--5:31--5:31--5:31--5:30--5:30--5:30--5:28
Sunset7:30--7:30--7:31--7:32--7:34--7:35--7:36--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
Rain (mm)
---------------------
Temp. °C211821211821211824231921211820211822231821
Feels °C (?)151316151317151221191415141317161420201418
  • 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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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.

View detailed surf forecast for Thermopylae at:
surf-forecast.com

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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