Thermopylae surf break

Thermopylae surfForecast / Cape Town / South Africa

information circle48hr Weather and Surf, issued 7 pm Friday 17 Apr 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
16.4° C
(Which is 1.5°C colder than average for this time of year)

How big are the waves at Thermopylae today?

The current surf forecast for Thermopylae at 1AM is: 3.0m 12s primary swell from a West-southwest direction and 1.2m 15s secondary swell from a Southwest direction (forecast issued at 07:00pm April 17). The wind direction is predicted to be onshore.

Time (SAST) & DateWave HeightWave Period
Morning (18 Apr)11ft (3.5m)12s
Afternoon (18 Apr)10ft (3.0m)12s
Evening (18 Apr)7ft (2.1m)13s

Table - waves today at Thermopylae. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent
Friday
17
Saturday
18
Sunday
19
Monday
20
5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM
Rating
(10 max)
1
0
2
3
3
4
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.5
WSW
3
WSW
3
WSW
3
WSW
3.5
SW
3.5
SW
3.5
SW
3
SW
2.1
SW
2.1
SW
3
WSW
2.1
WSW
2
WSW
2.5
WSW
3
WSW
4.5
W
5
WSW
5
WSW
5
WSW
4.5
WSW
4.5
WSW
4.5
WSW
4.5
SW
4.5
SW
Period(s) (?)111212121212111113131399910101111111212141414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1835206722682224335935032889235814751395268466060110101762392259926539621859325723721873836841
Wind
(km/h)
25
N
20
NW
15
W
15
W
15
W
15
NW
25
NNW
30
NW
35
NW
25
NW
25
NNW
25
N
30
NNW
35
NNW
50
NNW
45
WNW
50
W
45
W
40
W
35
W
30
W
25
WNW
25
WNW
25
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
onononcross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscrosscrosscross-
on
cross-
on
ononononononcross-
on
cross-
on
High Tide
/ height (m)
3:22PM
1.83
3:34AM
1.96
4:01PM
1.83
4:14AM
1.92
4:42PM
1.79
4:56AM
1.84
Low Tide
/ height (m)
9:23PM
0.29
9:51AM
0.19
10:02PM
0.30
10:30AM
0.23
10:43PM
0.36
11:12AM
0.32
Friday
17
Saturday
18
Sunday
19
Monday
20
Sunrise-----7:09-------7:11-------7:11--
Sunset6:21-------6:20-------6:19-------
light rain
rain showers
rain showers
light rain
cloud
light rain
part cloud
light rain
cloud
rain showers
rain showers
rain showers
light rain
light rain
light rain
thunderstorm
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
Rain (mm)
1311-1-1-222223421111---
Temp. °C131515161616171716161515151516161514141414151615
Feels °C (?)810121313131211911111198785456791110
  • 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

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.


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