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Surf Forecasts:

Extensions surfForecast / Cape Town / South Africa

information circle48hr Weather and Surf, issued 1 pm Tuesday 17 Mar 2026 SAST
Forecast update in hr  min  s Forecast update imminent
Extensions surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Extensions sea temperature is
17.9° C
 (Which is 1.7°C colder than average for this time of year)

How big are the waves at Extensions today?

The current surf forecast for Extensions at 5PM is: 1.5m 11s primary swell from a South-southwest direction and 0.3m 18s secondary swell from a Southwest direction (forecast issued at 01:00pm March 17). An open ocean swell of 1.3m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (SAST) & DateWave HeightWave Period
Morning (17 Mar)4.5ft (1.4m)11s
Afternoon (17 Mar)4.5ft (1.4m)11s
Evening (17 Mar)4.5ft (1.4m)11s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM
Rating
(10 max)
0
0
1
0
1
1
1
0
0
0
0
1
1
4
4
2
0
0
0
3
0
0
0
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.4
SSW
1.4
SSW
1.5
SSW
1.4
SSW
1.4
SSW
1.3
SSW
1.3
SSW
1.2
SW
1.4
SW
1.4
SW
1.4
SW
1.5
SSW
1.5
SSW
1.9
SSW
2.1
SSW
2.3
SSW
2.3
SSW
2.3
SSW
2.2
SSW
2.2
SSW
2.1
SSW
2.2
SSW
2.2
SSW
1.7
SSW
Period(s) (?)111111111111111114131313131615141414141413131313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4664585084504503963963348227327007227111706192521522169206419021849151016571657943
Wind
(km/h)
35
E
15
S
35
SE
40
SE
30
SE
30
ESE
30
SE
40
SE
40
SE
45
SE
50
ESE
40
ESE
35
E
20
E
10
N
20
NNW
20
NNW
30
NW
30
NW
10
WNW
20
SSW
25
SSW
30
SSW
30
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offoffoffcross-
off		crosscross-
on		cross-
on		cross-
on		oncross-
on		cross-
on		cross-
on		cross
High Tide
/ height (m)
2:34PM
1.47
2:50AM
1.62
3:07PM
1.54
3:22AM
1.70
3:41PM
1.58
3:54AM
1.74
Low Tide
/ height (m)
8:34AM
0.16
8:40PM
0.09
9:05AM
0.04
9:11PM
0.03
9:37AM
-0.03
9:43PM
0.00
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sunrise-------6:47-------6:48-------6:48
Sunset--7:01-------7:00-------6:59-----
part cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
part cloud
part cloud
light rain
part cloud
cloud
cloud
thunderstorm
thunderstorm
rain showers
clear
clear
Rain (mm)
---------------1---131--
Temp. °C212220202020191920191920202020182020201920191918
Feels °C (?)172217151718161516131215161921161816171918151413
  • 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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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 Extensions 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 Extensions at:
surf-forecast.com

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