Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Thermopylae surf break

Thermopylae surfForecast / Cape Town / South Africa

information circle16 Day Weather and Surf, issued 1 am Tuesday 17 Mar 2026 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
16.8° C
 (Which is 2.6°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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Mar 17) at 5AM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 1.6m and 7s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thermopylae in the next 16 days are 2.2m 14s and forecast to arrive on Thursday (Mar 19) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Mar 21) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 17th Mar)4.5ft (1.3m) 12s
Best Surf11PM (Wed 18th Mar)5ft (1.5m) 13s
Most Powerful11AM (Thu 19th Mar)7ft (2.2m) 14s

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

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

Short Range Forecast Light rain (total 2mm), mostly falling on Wed morning. Warm (max 24°C on Tue afternoon, min 19°C on Thu afternoon). Winds increasing (calm on Tue morning, fresh winds from the NW by Thu afternoon).

Days 3-6 Weather Summary Some drizzle, heaviest during Fri morning. Warm (max 23°C on Sun morning, min 16°C on Sat morning). Wind will be generally light.

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
2
2
3
2
4
2
0
4
2
2
3
3
1
3
2
1
3
2
0
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
SSW
1.4
SSW
1.4
SW
0.9
SW
1.4
SW
1.8
SSW
2.2
SSW
2.1
SSW
2
SSW
2.2
SSW
2.3
SSW
2
SSW
1.9
SSW
1.7
SSW
1.6
SW
1.5
SW
1.7
SSW
1.9
SSW
2
SSW
1.8
SW
1.6
SW
Period(s) (?)111111141313141413131012121112111111121212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)41145048533670010602005174812891497104411009537066485636749001098933760
Wind
(km/h)
5
SE
10
S
15
SSE
10
SSE
20
SSE
10
ESE
15
NNW
30
NW
10
SW
20
SSW
20
S
15
SSE
10
SE
20
S
10
ESE
10
SSW
20
S
5
SSE
20
S
25
S
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
on		cross-
on		cross-
on		crosscrosscross-
off		cross-
off		crosscross-
off		crosscrossglasscrosscrosscross-
off
High Tide
/ height (m)
2:40PM
1.71
2:54AM
1.85
3:13PM
1.79
3:26AM
1.93
3:46PM
1.84
3:59AM
1.96
4:21PM
1.84
4:34AM
1.95
4:57PM
1.80
5:12AM
1.88
5:36PM
1.71
5:53AM
1.77
6:21PM
1.59
Low Tide
/ height (m)
8:36AM
0.41
8:43PM
0.38
9:07AM
0.30
9:15PM
0.31
9:39AM
0.24
9:47PM
0.28
10:13AM
0.22
10:21PM
0.28
10:48AM
0.25
10:57PM
0.34
11:26AM
0.33
11:35PM
0.44
12:08PM
0.45
12:20AM
0.57
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Sunrise6:46--6:47--6:48--6:48--6:48--6:50--6:50--
Sunset-7:01--7:00--6:59--6:58--6:57--6:54--6:53-
cloud
cloud
cloud
thunderstorm
clear
part cloud
cloud
part cloud
thunderstorm
rain showers
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
Rain (mm)
---1----11-----------
Temp. °C232421222322222119181918192220232320212119
Feels °C (?)252422242321211918161515171917212119191816
  • 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

Latest Updates

Surf-Forecast Premium Launches 16-day Forecast and New, Improved Modelling
Ben Mondy

Surf-Forecast Premium Launches 16-day Forecast and New, Improved Modelling

Get 16% off your subscription with code 16DAYS—available for 16 days only, until March 25, 2026. Surf-Forecast Premium just got better. All paid subscribers will now see a full 16-day forecast, surf reports and wind and tide data for over 7,000 of the world's best surf spots. Premium members will also have access to a new high-resolution forecast model, which enhances our current forecasts by making them quicker and more accurate. That’s more lead time. More confidence. More chances to score g

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal
travel
Surf Forecast

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal

Surf road trips just got even better. Surf-Forecast users can now save up to 20% on SIXT rental cars worldwide during the promotional period until March 31, 2026. Whether you’re planning a legendary California road trip, chasing waves along Europe’s coasts, or exploring remote surf destinations, this exclusive SIXT offer helps you travel smarter and cheaper. And if you want some inspiration on where to go, check out our article Five Iconic Surf Road Trips. Click and get your SIXT discount

Read more

Read more

Discover more articles and updates in the Greenroom.

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.

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 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
Nearest locationNearest
Nearest locationNearest