Extensions Surf Break

Lat Long: 34.34° S 18.46° E

Extensions Surf Forecast and Surf Report

Issued: 1 pm 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Extensions sea temperature is
14.2°C
1.6° 

Extensions surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Extensions surf forecast from 16 Sep 2026:

  • Best quality surf: Monday 21 Sep, 5PM (local time) - 4ft (1.2m), 12s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 23 Sep, 8PM (local time) - 10ft (3.0m), 12s period, SW swell with 2,212 kJ wave energy.
  • Next surfable swell (1★+): Monday 21 Sep, 5PM (local time) - 4ft (1.2m), 12s period with SW swell.

Best Forecast Surf Conditions for Extensions this week:

The surf forecast for Extensions over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 5PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.2m and 15s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Extensions in the next 16 days are 3.0m 12s and forecast to arrive on Wednesday (Sep 23) 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 2.5m 7s period and expected on Saturday (Sep 19) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 21st Sep)4ft (1.2m) 12s
Best Surf 5PM (Mon 21st Sep)4ft (1.2m) 12s
Most Powerful 8PM (Wed 23rd Sep)10ft (3.0m) 12s

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


Short Range Forecast

Mostly dry. Very mild (max 16°C on Fri afternoon, min 13°C on Wed afternoon). Mainly near gales.

Days 5-7 Weather Summary

Mostly dry. Warm (max 22°C on Mon night, min 15°C on Sat night). Winds decreasing (near gales from the SE on Sat afternoon, calm by Mon night).

Wed
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
0
0
0
0
0
0
0
1
0
1
1
2
2
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
W
13
2.2
SW
13
2.2
SW
12
2
SW
12
1.8
SW
11
1.7
SW
11
1.8
SW
13
1.7
SW
12
1.3
SW
12
1.6
SW
14
2.3
SW
14
2
WSW
13
1.7
WSW
13
1.5
WSW
12
1.3
WSW
12
1.2
SW
12
1.2
SW
11
0.9
SW
13
0.9
SW
12
1.4
SW
8
Wave Graph
Metric surfscale
Energy kJ
999
1569
1347
1092
851
713
1037
874
448
978
1977
1401
998
626
436
386
360
234
212
223
Wind (km/h)
45
SE
50
SE
45
SE
50
SE
45
ESE
50
ESE
55
SE
55
ESE
50
ESE
60
SE
50
ESE
40
ESE
40
SE
35
SE
20
SE
15
SE
10
NW
30
NNW
25
NW
35
NNW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross
High Tide
5:59PM1.27m
6:21AM1.13m
6:34PM1.13m
7:06AM1.01m
7:26PM1.01m
8:42AM0.91m
9:33PM0.93m
11:22AM0.95m
11:39PM0.99m
12:27PM1.07m
00:35AM1.10m
1:03PM1.21m
1:12AM1.22m
Low Tide
00:14AM0.41m
12:18PM0.50m
00:52AM0.53m
1:00PM0.63m
1:59AM0.64m
2:48PM0.73m
4:46AM0.66m
5:46PM0.68m
6:12AM0.56m
6:42PM0.56m
6:53AM0.44m
7:17PM0.43m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:39
6:39
6:37
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:38
6:39
6:39
6:40
6:42
 mm
1
Temp °C
14
14
14
14
14
14
16
15
15
17
16
17
19
17
17
19
22
16
16
16
Feels °C
5
4
5
4
5
4
6
6
6
8
7
11
13
10
14
18
23
12
11
12
  • 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
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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 16 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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