Extensions Surf Break

Lat Long: 34.34° S 18.46° E

Extensions Surf Forecast and Surf Report

Issued: 1 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Extensions sea temperature is
14.5° C
1.3° 

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


Extensions surf forecast from 16 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 5AM (local time) - 10ft (3.0m), 13s period, SW swell with cross-offshore winds.
  • Most powerful swell: Sunday 23 Aug, 11AM (local time) - 15ft (4.5m), 16s period, SSW swell with 9,057 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 8AM (local time) - 8ft (2.5m), 12s 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 Tuesday (Aug 18) at 8AM. The primary swell is predicted to be 2.5m and 12s period. 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 4.5m 16s and forecast to arrive on Sunday (Aug 23) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Friday (Aug 21) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 18th Aug)8ft (2.5m) 12s
Best Surf 5AM (Thu 20th Aug)10ft (3.0m) 13s
Most Powerful11AM (Sun 23rd Aug)15ft (4.5m) 16s

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


Short Range Forecast

Mostly dry. Very mild (max 17°C on Sun night, min 12°C on Tue night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 14°C on Wed afternoon, min 12°C on Thu night). Winds increasing (light winds from the S on Wed night, strong winds from the SE by Thu night).

Sun
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
3
2
2
3
3
2
2
2
3
3
4
2
1
3
3
1
0
0
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
WSW
14
3
WSW
14
3
WSW
13
2.5
WSW
13
2.2
WSW
13
2
WSW
12
3
SW
13
3
SW
12
2.5
SW
12
2.5
SW
12
2.5
SW
13
3.5
SW
13
3
SW
13
2.3
SW
12
2.1
SW
11
1.6
SSW
11
1.2
WSW
11
1.9
SW
10
3
SW
12
2.5
SSW
13
Wave Graph
Metric surfscale
Energy kJ
2671
3703
2709
2354
1624
1197
2815
2495
1978
1742
2254
3816
2984
1513
1017
572
300
789
2525
2101
Wind (km/h)
25
NW
25
N
20
NNW
15
WNW
15
SW
15
SE
25
SE
30
SE
15
S
10
SSW
5
S
20
SE
35
SE
35
SE
25
ESE
15
SE
20
NW
35
NNW
30
WNW
20
SW
Wind State
cross-on
cross
cross
cross-on
cross-on
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross-on
High Tide
5:39PM1.55m
5:56AM1.33m
6:12PM1.43m
6:31AM1.21m
6:47PM1.29m
7:10AM1.10m
7:27PM1.16m
8:02AM0.99m
8:29PM1.04m
9:44AM0.92m
10:23PM0.98m
11:55AM0.96m
00:07AM1.03m
Low Tide
11:56PM0.19m
11:56AM0.25m
00:31AM0.30m
12:29PM0.37m
1:07AM0.42m
1:04PM0.50m
1:53AM0.54m
1:54PM0.62m
3:16AM0.63m
3:46PM0.71m
5:32AM0.62m
6:06PM0.66m
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
light rain
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:20
7:20
7:18
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:15
6:16
6:17
6:19
6:19
6:20
 mm
1
Temp °C
16
17
17
16
16
14
14
13
13
14
14
14
13
13
12
14
14
14
15
15
Feels °C
11
13
14
13
14
12
10
7
11
12
12
12
8
6
6
11
13
8
11
10
  • 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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