Extensions Surf Break

Lat Long: 34.34° S 18.46° E

Extensions Surf Forecast and Surf Report

Issued: 7 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Extensions sea temperature is
14.9° C
0.7° 

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


Extensions surf forecast from 10 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 2AM (local time) - 5ft (1.6m), 21s period, SW swell with offshore winds.
  • Most powerful swell: Thursday 13 Aug, 8AM (local time) - 8ft (2.5m), 18s period, SW swell with 4,373 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 11AM (local time) - 6ft (1.9m), 18s 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 Wednesday (Aug 12) at 11AM. The primary swell is predicted to be 1.9m and 18s period with a secondary swell of 0.7m and 10s. 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 18s and forecast to arrive on Thursday (Aug 13) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 8s period and expected on Tuesday (Aug 11) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Wed 12th Aug)6ft (1.9m) 18s
Best Surf 2AM (Thu 13th Aug)5ft (1.6m) 21s
Most Powerful 8AM (Thu 13th Aug)8ft (2.5m) 18s

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


Short Range Forecast

Mostly dry. Warm (max 24°C on Thu afternoon, min 12°C on Mon night). Winds decreasing (near gales from the ESE on Tue afternoon, light winds from the ESE by Wed afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 21°C on Thu night, min 15°C on Sat night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
0
2
4
4
5
5
4
2
3
4
4
4
4
3
4
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
S
13
1.8
SSW
12
1.3
SSW
12
1.6
SW
21
1.9
SW
18
2
SW
17
1.6
SW
21
2.5
SW
17
2.3
WSW
16
2.1
WSW
16
2
WSW
15
1.9
WSW
14
1.9
WSW
14
2
WSW
14
1.9
WSW
14
1.8
WSW
13
1.8
WSW
14
2.1
WSW
14
2.5
WSW
13
Wave Graph
Metric surfscale
Energy kJ
3337
919
483
2150
2344
2375
2093
3782
2731
1997
1622
1517
1353
1461
1306
1144
1259
1564
2515
Wind (km/h)
50
ESE
50
ESE
55
ESE
40
E
20
ENE
15
ESE
25
E
15
N
15
E
15
N
5
NNW
5
WNW
10
NW
5
NNE
10
WSW
15
NNW
5
NW
10
SSE
5
ENE
Wind State
off
off
off
off
off
cross-off
off
cross-off
off
cross
cross
cross-on
cross-on
cross-off
on
cross-on
cross-on
cross-off
cross-off
High Tide
2:01AM1.45m
2:32PM1.51m
2:48AM1.53m
3:14PM1.62m
3:30AM1.57m
3:53PM1.68m
4:09AM1.56m
4:30PM1.69m
4:46AM1.51m
5:05PM1.64m
5:21AM1.43m
5:39PM1.55m
Low Tide
8:20AM0.10m
8:44PM0.13m
9:02AM0.02m
9:28PM0.05m
9:40AM-0.02m
10:08PM0.02m
10:16AM-0.01m
10:46PM0.04m
10:51AM0.05m
11:22PM0.10m
11:24AM0.13m
11:56PM0.19m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:30
7:28
7:28
7:26
7:26
7:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:12
6:13
6:14
6:14
6:15
6:15
 mm
Temp °C
13
12
15
13
15
20
21
22
24
21
20
19
19
16
16
15
16
17
17
Feels °C
3
3
5
2
11
17
15
18
21
20
15
14
17
13
13
13
14
17
14
  • 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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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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