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Surf Forecasts:

Thermopylae surf break

Thermopylae surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 am Monday 20 Oct 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
15.1° C
 (Which is 1.2°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 Monday (Oct 20) at 5AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 1.4m and 7s. 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 4.0m 13s and forecast to arrive on Monday (Oct 27) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Wednesday (Oct 22) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 20th Oct)8ft (2.5m) 15s
Best Surf 5AM (Mon 20th Oct)8ft (2.5m) 15s
Most Powerful 8AM (Mon 27th Oct)13ft (4.0m) 13s

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 25°C on Tue afternoon, min 14°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Sat night. Very mild (max 19°C on Thu afternoon, min 12°C on Sat night). Winds increasing (light winds from the SSW on Fri night, fresh winds from the WNW by Sat afternoon).

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
3
3
2
1
4
4
3
2
3
2
3
3
2
3
0
0
0
2
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.4
SW
1.8
SW
1.4
SW
1.3
SW
1.3
SW
1.6
SW
2
SW
1.9
SW
1.6
SW
1.4
SW
2.5
SW
2.3
SW
1.9
SW
1.9
SW
1.3
WSW
1.2
WSW
2
SW
3
SW
3.5
SW
3
SW
3
SW
Period(s) (?)1414131212161413121715131212111089121212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)22021318663537511123914291191661102426861811110010254012795531291274930542756
Wind
(km/h)
15
S
25
SSE
20
SE
15
SE
25
SSE
15
SE
10
SW
20
SSE
20
SSE
15
SSW
20
S
15
S
15
S
15
SSW
10
N
25
W
30
WNW
25
WSW
15
WSW
20
WNW
25
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
on		cross-
off		cross-
off		crosscrosscrosscrosscrosscross-
off		ononcross-
on		ononcross-
on
High Tide
/ height (m)
2:42PM
1.76
3:02AM
1.66
3:08PM
1.77
3:29AM
1.67
3:34PM
1.75
3:55AM
1.65
4:00PM
1.70
4:23AM
1.61
4:26PM
1.64
4:51AM
1.55
4:53PM
1.56
5:23AM
1.48
5:24PM
1.47
Low Tide
/ height (m)
8:33AM
0.44
8:56PM
0.35
8:58AM
0.43
9:20PM
0.35
9:23AM
0.44
9:44PM
0.36
9:49AM
0.47
10:09PM
0.39
10:15AM
0.52
10:36PM
0.45
10:43AM
0.59
11:04PM
0.52
11:15AM
0.68
11:37PM
0.60
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Sunrise5:58--5:58--5:56--5:56--5:54--5:52--5:52--
Sunset-7:02--7:04--7:05--7:06--7:06--7:07--7:07-
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
rain showers
part cloud
rain showers
part cloud
clear
cloud
Rain (mm)
---------------2-4---
Temp. °C202121212519252217181916181816151513131314
Feels °C (?)1718181822172319151716131615141096889
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Cape Town

  1. weather stationWind Update Continuing clean conditions at Thermopylae (light winds from the ESE at SHIP8098 0 km from Thermopylae). 2.5m 15s groundswell from the SSW with a 2.0m 6s windswell from the SE. 2 swells combining so expect closeout sets.

    2 hours 8 minutes ago Thermopylae
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2 h 8 min ago

7 km/h
ESE
Clean
Please reload the page to see if there are any updates.

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.

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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