Extensions Surf Break

Lat Long: 34.34° S 18.46° E

Extensions 48 hour detailed Surf Forecast

Issued: 1 pm 17 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.


How big are the waves at Extensions today (17 Aug):

  • Morning surf: Morning surf (17 Aug, local time) - 10ft (3.0m), 13s period with WSW swell.
  • Afternoon surf: Afternoon surf (17 Aug, local time) - 10ft (3.0m), 13s period with WSW swell.
  • Evening surf: Evening surf (17 Aug, local time) - 8ft (2.5m), 13s period with WSW swell.

The current surf forecast for Extensions at 5PM is: 2.5m 13s primary swell from a West-southwest direction and 0.6m 16s secondary swell from a West-southwest direction (forecast issued at 01:00pm August 17). The wind direction is predicted to be cross-onshore.

Time (SAST) & DateWave HeightWave Period
Morning (17 Aug)10ft (3.0m)13s
Afternoon (17 Aug)10ft (3.0m)13s
Evening (17 Aug)8ft (2.5m)13s

Table - waves today at Extensions. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 3mm), mostly falling on Mon afternoon. Very mild (max 16°C on Mon afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SE on Tue night, light winds from the WNW by Wed night).

Mon
17
Tuesday
18
Wednesday
19
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
1
0
2
3
3
3
4
3
4
3
3
2
2
2
3
3
4
3
3
3
4
Swell
Height Map
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
13
3
WSW
13
2.5
WSW
13
2.5
WSW
13
2.5
WSW
13
2.3
WSW
13
2.5
WSW
13
2.5
WSW
12
2.1
WSW
12
2.5
SW
13
3
SW
13
3
SW
12
3
SW
12
3
SW
12
3
SW
12
3
SW
12
2.5
SW
12
2.5
SW
12
2.5
SW
12
2.4
SW
12
2.4
SW
12
Wave Graph
Metric surfscale
Energy kJ
2528
2658
2354
2449
2279
1766
1974
2001
1310
2063
2859
2990
2924
2397
2454
2196
1978
1978
1771
1665
1693
Wind (km/h)
25
NNW
25
NNW
15
WSW
15
W
10
W
10
W
10
SW
10
S
10
SSE
15
SSE
20
SSE
30
SE
30
SE
25
SE
25
SE
20
SSE
15
SSE
10
SW
15
WSW
10
W
5
WNW
Wind State
cross
cross-on
cross-on
on
on
on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
on
on
on
High Tide
6:12PM1.43m
6:31AM1.21m
6:47PM1.29m
7:10AM1.10m
7:27PM1.16m
Low Tide
11:56AM0.25m
00:31AM0.30m
12:29PM0.37m
1:07AM0.42m
1:04PM0.50m
part cloud
part cloud
light rain
light rain
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:22
7:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:16
6:17
 mm
2
1
Temp °C
16
16
14
14
15
14
14
14
14
14
13
13
13
12
12
12
13
13
14
14
15
Feels °C
12
12
12
12
13
13
13
13
12
11
9
8
8
7
8
8
11
11
11
12
14
  • 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
How to use the Wavefinder 

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.


Nearest locationNearest