Extensions Surf Forecast

/ Cape Town (69 surf breaks) /

South Africa (273 surf breaks) / Lat Long: (34.34° S 18.46° E)

Surf Forecasts:

Extensions surfForecast / Cape Town / South Africa

12 Day Weather and Surf, issued 7 am Saturday 23 Aug 2025 SAST

Forecast update in hr min s Forecast update imminent

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

Today's Extensions sea temperature is 15.6° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Extensions this week:

The surf forecast for Extensions over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 23) at 11AM. The primary swell is predicted to be 5.5m and 13s period with a secondary swell of 5.0m and 13s. The wind is predicted to be onshore as the swell arrives.

The most powerful waves expected at Extensions in the next 12 days are 5.5m 14s and forecast to arrive on Saturday (Aug 23) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Saturday (Aug 30) at 2AM.

Wave Type	Time (SAST) & Date	Wave Height & Period
Next good surf (1 star+)	11AM (Sat 23rd Aug)	18ft (5.5m) 13s
Best Surf	11AM (Sat 23rd Aug)	18ft (5.5m) 13s
Most Powerful	5PM (Sat 23rd Aug)	18ft (5.5m) 14s

Table - best surf conditions forecast for Extensions over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 2mm), mostly falling on Sat morning. Very mild (max 14°C on Sat morning, min 12°C on Mon night). Winds increasing (light winds from the SW on Sun afternoon, strong winds from the SE by Mon night).									Days 3-6 Weather Summary Some drizzle, heaviest during Thu night. Very mild (max 15°C on Thu afternoon, min 12°C on Tue morning). Winds decreasing (strong winds from the SE on Tue night, light winds from the WNW by Wed night).
	Saturday 23			Sunday 24			Monday 25			Tuesday 26			Wednesday 27			Thursday 28			Friday 29
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	!	0	0	4	4	3	4	2	1	0	0	1	2	1	3	1	0	6	5	7	6
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SSW	SSW	SSW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	13	14	14	14	13	13	12	12	12	11	11	10	10	9	12	18	17	16	14	15	14
Wave Graph (?)
Energy (?)	18313	12839	9547	5893	4445	2878	1816	1726	1267	960	933	547	600	704	990	1481	2876	5898	5555	7557	5865
Wind (km/h)	WNW	W	W	WSW	SW	SSE	SSE	SSE	SE	ESE	SSE	SE	SSE	S	WNW	NNW	NW	S	SE	S	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	on	on	cross- on	cross- on	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross	on	cross	cross- on	cross- off	cross- off	cross	glass
High Tide / height (m)		3:35PM 1.59	3:47AM 1.49		4:05PM 1.61	4:18AM 1.47		4:34PM 1.59	4:47AM 1.43		5:02PM 1.54		5:16AM 1.36	5:30PM 1.45		5:45AM 1.28	5:58PM 1.35		6:14AM 1.18	6:28PM 1.24
Low Tide / height (m)	9:25AM 0.07		9:49PM 0.10	9:55AM 0.07		10:19PM 0.10	10:23AM 0.09		10:49PM 0.13	10:50AM 0.15		11:17PM 0.18	11:16AM 0.22		11:44PM 0.26	11:43AM 0.32		12:12AM 0.35	12:10PM 0.42		12:44AM 0.46

	Saturday 23			Sunday 24			Monday 25			Tuesday 26			Wednesday 27			Thursday 28			Friday 29
Sunrise	7:16	-	-	7:15	-	-	7:13	-	-	7:13	-	-	7:11	-	-	7:09	-	-	7:09	-	-
Sunset	-	6:21	-	-	6:21	-	-	6:22	-	-	6:22	-	-	6:22	-	-	6:23	-	-	6:24	-

Rain (mm)	1	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	-	-	-
Temp. °C	14	14	14	13	13	13	14	14	14	12	14	13	13	14	14	14	15	15	14	14	14
Feels °C (?)	5	6	7	8	9	9	10	10	7	3	7	4	7	10	11	10	11	12	10	12	12

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Cape Town

Wind Update The wind is still cross-on at Extensions (light winds from the SW at Cape Point (68916 -0) 3 km from Extensions). 4.5m 13s groundswell from the WSW with a 3.5m 13s groundswell from the SW. 2 swells combining so expect closeout sets.
1 hour 52 minutes ago Extensions

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1 h 52 min ago

11 km/h

Cross-On

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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.

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 12 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.