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Surf Forecasts:

Extensions surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Tuesday 10 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
19.3° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Extensions this week:

The surf forecast for Extensions over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Mar 11) at 2AM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 0.8m and 11s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Extensions in the next 12 days are 2.1m 16s and forecast to arrive on Friday (Mar 13) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Tuesday (Mar 17) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 11th Mar)2.5ft (0.7m) 15s
Best Surf11PM (Wed 11th Mar)2.5ft (0.8m) 16s
Most Powerful 8PM (Fri 13th Mar)7ft (2.1m) 16s

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

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

Short Range Forecast Mostly dry. Warm (max 31°C on Wed afternoon, min 20°C on Fri morning). Winds increasing (calm on Wed night, fresh winds from the SSE by Fri morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Sun morning, min 19°C on Sat morning). Winds decreasing (near gales from the SE on Sat afternoon, light winds from the SSE by Mon morning).

Tue
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
2
2
1
3
1
0
1
2
2
1
0
0
0
1
0
1
3
2
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
SW
0.7
SW
0.8
SW
0.8
SW
1.1
SW
1
SW
1.2
SW
1
SW
1.1
WSW
1.9
WSW
2
WSW
1.8
WSW
1.5
WSW
1.2
WSW
1.1
SW
0.7
SSW
1.3
SSW
1.4
SSW
1.3
SSW
2.1
SSW
1.7
SSW
Period(s) (?)111513131213121217161513131211141312121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2462092152463803154162687421811169311277223713031785875364751107780
Wind
(km/h)
25
SE
25
ESE
5
SE
10
S
5
ESE
10
S
20
S
20
SSE
30
SSE
30
SSE
45
SSE
45
SE
50
SE
40
SE
20
SSE
25
SSE
30
SE
10
SSE
10
SW
35
W
30
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offcross-
off		crosscross-
off		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
on		onon
High Tide
/ height (m)
7:10PM
1.01
7:29AM
1.02
8:37PM
0.90
9:28AM
0.93
11:35PM
0.93
11:50AM
0.99
12:45AM
1.06
12:49PM
1.11
1:21AM
1.21
1:28PM
1.24
1:51AM
1.36
2:01PM
1.36
2:20AM
1.50
Low Tide
/ height (m)
1:01AM
0.61
2:00PM
0.64
2:25AM
0.73
4:55PM
0.67
5:55AM
0.70
6:30PM
0.56
6:56AM
0.57
7:10PM
0.43
7:32AM
0.43
7:42PM
0.30
8:03AM
0.29
8:11PM
0.19
8:34AM
0.16
Tue
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Sunrise--6:41--6:41--6:43--6:43--6:43--6:45--6:46
Sunset7:10--7:09--7:08--7:07--7:06--7:05--7:02--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
Rain (mm)
---------------------
Temp. °C282830313024222220202020202022222021222119
Feels °C (?)252629302923232218171715141422211822242414
  • 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

Information about the Extensions Surf forecast

The above surf forecast table for Extensions provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Extensions can be found by selecting the local surf guide option on the grey menu. Our Extensions 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 (Extensions) 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 Extensions 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 Extensions, camping, hotels and holiday cottages in Cape Town, consider staying in Cape Town which is 45 km (28 miles) away. Other places in and around Cape Town where you can find information about places to rent, and car hire include Bellville which is 51 km (32 miles) away, Grabouw, Stellenbosch and Kayamnandi.

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