Extensions Surf Break

Lat Long: 34.34° S 18.46° E

Extensions Surf Forecast and Surf Report

Issued: 7 pm 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Extensions sea temperature is
14.2°C
1.5° 

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


Extensions surf forecast from 18 Sep 2026:

  • Best quality surf: Friday 25 Sep, 5AM (local time) - 7ft (2.1m), 13s period, SSW swell with offshore winds.
  • Most powerful swell: Thursday 24 Sep, 8PM (local time) - 8ft (2.5m), 14s period, SSW swell with 2,487 kJ wave energy.
  • Next surfable swell (1★+): Monday 21 Sep, 11PM (local time) - 3.5ft (1.0m), 11s period with WSW 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 11PM. The primary swell is predicted to be 1.0m and 11s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Extensions in the next 16 days are 2.5m 14s and forecast to arrive on Thursday (Sep 24) 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 3.0m 7s period and expected on Thursday (Sep 24) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 21st Sep)3.5ft (1.0m) 11s
Best Surf 5AM (Fri 25th Sep)7ft (2.1m) 13s
Most Powerful 8PM (Thu 24th Sep)8ft (2.5m) 14s

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


Short Range Forecast

Mostly dry. Warm (max 24°C on Mon afternoon, min 12°C on Fri night). Winds decreasing (near gales from the SE on Sat afternoon, light winds from the SE by Mon afternoon).

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Wed afternoon. Warm (max 24°C on Mon night, min 15°C on Tue night). Winds increasing (calm on Tue night, strong winds from the SE by Wed night).

Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
1
2
0
1
1
2
3
1
0
1
0
0
0
1
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
12
1.3
SW
12
1.8
SW
14
2.3
SW
13
1.9
SW
13
1.7
WSW
13
1.5
WSW
12
1.3
WSW
12
1.2
SW
11
1.1
SW
11
1.1
SW
13
1.1
SW
12
1.3
SW
11
0.9
SW
11
1.5
SSW
7
0.9
WSW
10
1.1
SSW
14
1.9
SSW
14
2.2
SSW
13
Wave Graph
Metric surfscale
Energy kJ
811
448
1255
1810
1288
998
636
472
373
314
431
367
377
191
222
175
478
1303
1657
Wind (km/h)
40
ESE
35
SE
55
SE
45
ESE
30
ESE
45
SE
35
ESE
25
ESE
20
SE
10
NE
20
WNW
20
WNW
10
WNW
25
SSE
40
SE
45
ESE
30
ESE
35
ESE
25
ESE
Wind State
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-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
8:42AM0.91m
9:33PM0.93m
11:22AM0.95m
11:39PM0.99m
12:27PM1.07m
00:35AM1.10m
1:03PM1.21m
1:12AM1.22m
1:33PM1.34m
1:44AM1.33m
2:01PM1.47m
2:15AM1.43m
Low Tide
1:59AM0.64m
2:48PM0.73m
4:46AM0.66m
5:46PM0.68m
6:12AM0.56m
6:42PM0.56m
6:53AM0.44m
7:17PM0.43m
7:23AM0.33m
7:47PM0.30m
7:52AM0.23m
8:15PM0.18m
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
part cloud
light rain
rain showers
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:39
6:39
6:37
6:35
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:39
6:39
6:40
6:42
6:42
6:43
 mm
1
1
1
4
Temp °C
14
15
16
16
19
21
18
20
24
24
23
21
16
15
15
15
16
21
21
Feels °C
4
9
8
7
15
16
11
17
22
22
21
19
14
14
10
6
12
16
17
  • 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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