Extensions 48 hour detailed Surf Forecast

Lat Long: 34.34° S 18.46° E

Issued: 7 am 21 Jul 2026 (local time)

Forecast update in hr min

Today's Extensions sea temperature is

15.7° C

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

Surf Forecasts:

How big are the waves at Extensions today (21 Jul):

Morning surf: Morning surf (21 Jul, local time) - 8ft (2.4m), 14s period with SSW swell.
Afternoon surf: Afternoon surf (21 Jul, local time) - 10ft (3.0m), 14s period with SW swell.
Evening surf: Evening surf (21 Jul, local time) - 8ft (2.5m), 13s period with SW swell.

The current surf forecast for Extensions at 11AM is: 2.5m 14s primary swell from a Southwest direction and 0.5m 9s secondary swell from a West direction (forecast issued at 07:00am July 21). The wind direction is predicted to be glassy and the swell rating is 4.

Time (SAST) & Date	Wave Height	Wave Period
Morning (21 Jul)	8ft (2.4m)	14s
Afternoon (21 Jul)	10ft (3.0m)	14s
Evening (21 Jul)	8ft (2.5m)	13s

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

	Short Range Forecast Light rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 14°C on Tue afternoon, min 12°C on Wed night). Mainly strong winds.
	Tuesday 21							Wednesday 22								Thursday 23
	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	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM
Rating (10 max)	3	3	4	4	3	3	4	4	4	3	2	0	0	0	1	1	0	0	0	2	5	9	8
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SSW 15	SSW 14	SW 14	SW 14	SW 13	SW 13	SW 13	SW 13	SW 12	SW 12	SW 12	SW 12	SW 12	SW 12	WSW 12	WSW 12	WSW 12	SW 11	SW 11	WSW 11	SW 13	SW 18	SW 16
Wave Graph
kJ	665	2025	2725	2886	2802	2561	2114	1908	1643	1500	1404	1381	1298	1293	893	920	1010	1226	1197	1326	2254	10917	11408
Wind (km/h)	NW	N	N	SW	S	S	SSE	SSW	WNW	NNW	NW	NW	NNW	NW	NNW	NNW	N	N	NNW	NNW	ENE	ESE	ESE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-on	cross	glassy	cross-on	cross	cross	cross-off	cross-on	on	cross-on	cross-on	cross-on	cross-on	cross-on	cross	cross	cross	cross	cross	cross	glassy	cross-off	cross-off
High Tide			8:12AM1.07m				8:35PM1.19m				9:19AM1.00m				9:42PM1.11m				10:47AM0.97m
Low Tide					2:07PM0.50m				3:13AM0.51m				3:11PM0.60m				4:33AM0.55m				4:45PM0.64m


	7:47	—	—	—	—	—	—	—	7:46	—	—	—	—	—	—	—	7:46	—	—	—	—	—	—
	—	—	—	—	5:57	—	—	—	—	—	—	—	5:58	—	—	—	—	—	—	—	5:59	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	2	1	—	—
Temp °C	14	13	13	14	14	14	14	14	14	13	14	14	14	14	13	13	12	12	12	12	13	13	14
Feels °C	12	12	12	13	12	12	12	12	12	10	10	10	9	9	8	7	5	4	5	9	13	12	11
Swell 1 Height (m) Direction Period (s)	SSW 15	SSW 14	SW 14	SW 14	SW 13	SW 13	SW 13	SW 13	SW 12	SW 12	SW 12	SW 12	SW 12	SW 12	WSW 12	WSW 12	WSW 12	SW 11	SW 11	WSW 11	SW 13	SW 18	SW 16
kJ	665	2025	2725	2886	2802	2561	2114	1908	1643	1500	1404	1381	1298	1293	893	920	1010	1226	1197	1326	2254	10917	11408
Swell 2 Height (m) Direction Period (s)	SSW 7	W 9	W 9	SE 11	SE 11	SE 11	SE 11	SE 11	SE 11	SE 11	SSW 15	SSW 14	SSW 14	SSW 14	SSW 12	S 12	SSW 12	ESE 13	NW 6	WSW 12	SW 19	ESE 12	ESE 12
kJ	90	40	40	44	32	31	30	30	30	18	72	165	204	145	392	294	311	17	114	178	2117	58	57
Swell 3 Height (m) Direction Period (s)	SSW 11	SE 11	SE 11	W 9	W 9	—	—	—	—	—	ESE 11	ESE 11	ESE 11	ESE 11	ESE 14	ESE 13	ESE 13	SE 8	WSW 12	SW 21	NNW 5	—	—
kJ	143	61	43	14	14	—	—	—	—	—	12	12	12	12	18	17	17	3	57	218	22	—	—
Wind waves Height (m) Direction Period (s)	—	—	—	—	—	—	—	—	—	—	—	WNW 3	NW 4	NW 3	NNW 4	NNW 4	NNW 5	NW 6	NW 6	—	—	—	—
kJ	—	—	—	—	—	—	—	—	—	—	—	3	10	5	17	35	80	178	66	—	—	—	—
Nearest Offshore or Glassy	Platboom Cape Town	Platboom Cape Town	Extensions Cape Town	Buffels Bay Cape Town	Olifants Bos Cape Town	Olifants Bos Cape Town	Extensions Cape Town	Black Rocks Cape Town	Platboom Cape Town	Platboom Cape Town	Platboom Cape Town	Platboom Cape Town	Clovelly Cape Town	Platboom Cape Town	Nine Mile Reef Cape Town	Nine Mile Reef Cape Town	Nine Mile Reef Cape Town	Nine Mile Reef Cape Town	Nine Mile Reef Cape Town	Nine Mile Reef Cape Town	Extensions Cape Town	Extensions Cape Town	Scarborough Point Cape Town
Rating (10 max)	3	4	4	4	4	4	4	3	4	4	4	4	3	4	3	3	3	3	3	3	5	9	9
Distance (km)	1	1	0	3	12	12	0	5	1	1	1	1	24	1	35	35	35	35	35	35	0	0	18
Best forecast wave conditions in Cape Town	Kreefte Reef	Van Riebeek	Hout Bay	Hout Bay	Kamer Van	Haakgat	Kreefte Reef	Kreefte Reef	Kreefte Reef	Kreefte Reef	Platboom	Cemetery	Cemetery	Platboom	Van Riebeek	Little Bay	Van Riebeek	Monwabisi Strand	Monwabisi Strand	Monwabisi Strand	The Hoek	Thermopylae	Big Bay
Rating (10 max)	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	3	5	9	9
Best forecast wave conditions in South Africa	Fish Boma Garden Route	Haga-Haga Eastern Cape - Wild Coast	Haga-Haga Eastern Cape - Wild Coast	Gerickes Point Garden Route	Gerickes Point Garden Route	Periwinkles Eastern Cape - Wild Coast	Periwinkles Eastern Cape - Wild Coast	Periwinkles Eastern Cape - Wild Coast	Periwinkles Eastern Cape - Wild Coast	Periwinkles Eastern Cape - Wild Coast	Hamburg (Port Alfred) Eastern Cape (S)	Kleinemonde Eastern Cape (S)	Haga-Haga Eastern Cape - Wild Coast	Riet River Eastern Cape (S)	Gerickes Point Garden Route	Goukamma River Mouth Garden Route	Fish Boma Garden Route	Fish Boma Garden Route	Goukamma River Mouth Garden Route	Millars Point Eastern Cape (S)	The Hoek Cape Town	Thermopylae Cape Town	Dolphin Point Overberg
Rating (10 max)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	9	9
Header Global	Papatowai New Zealand	Papatowai New Zealand	Asu Indonesia	Cape St Martin South Africa	Chameau Mauritius	Sea Vista South Africa	Cobblestones Australia	Cobblestones Australia	Cobblestones Australia	Cobblestones Australia	Cobblestones Australia	Gas Bay Australia	Papa Tangaroa Chile	Viri Inga O Tuki Chile	Cathedral Rock Australia	Cobblestones Australia	Boulders Samoa	Cyclops Australia	Brak River South Africa	Benkunqut Indonesia	The Hoek South Africa	Dolphin Point South Africa	Dolphin Point South Africa
Rating (10 max)	5	5	4	4	4	5	5	5	6	6	5	5	8	7	9	5	4	5	4	4	5	5	9

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

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Ben Mondy

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Extensions 48 hour detailed Surf Forecast

How big are the waves at Extensions today (21 Jul):

Short Range Forecast

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