Arniston 48 hour detailed Surf Forecast

Lat Long: 34.69° S 20.23° E

Issued: 7 am 12 Sep 2026 (local time)

Forecast update in hr min

Today's Arniston sea temperature is

16.5°C

Arniston 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 Arniston today (12 Sep):

Morning surf: Morning surf (12 Sep, local time) - 3.5ft (1.1m), 15s period with SW swell.
Afternoon surf: Afternoon surf (12 Sep, local time) - 4.5ft (1.4m), 17s period with SSW swell.
Evening surf: Evening surf (12 Sep, local time) - 5.5ft (1.7m), 16s period with SSW swell.

The current surf forecast for Arniston at 12PM is: 1.2m 15s primary swell from a South-southwest direction and 0.5m 9s secondary swell from a South direction, 1.9m 6s secondary swell from a East-southeast direction (forecast issued at 07:00am September 12). The wind direction is predicted to be onshore.

Time (SAST) & Date	Wave Height	Wave Period
Morning (12 Sep)	3.5ft (1.1m)	15s
Afternoon (12 Sep)	4.5ft (1.4m)	17s
Evening (12 Sep)	5.5ft (1.7m)	16s

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

	Short Range Forecast Moderate rain (total 19mm), heaviest on Sat afternoon. Warm (max 20°C on Mon afternoon, min 15°C on Sat morning). Winds decreasing (near gales from the E on Sat night, light winds from the NW by Mon night).
	Saturday 12							Sunday 13								Monday 14
	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)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	!	!	!	4	3	4	3
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SSW 15	SSW 15	SSW 15	SSW 17	SSW 17	SSW 16	SSW 16	ESE 9	ESE 9	ESE 9	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10
Wave Graph
kJ	190	372	600	1032	1553	1393	1397	2165	2497	2608	2779	2810	2525	2216	2306	1532	1299	1172	990	804	706	616	533
Wind (km/h)	ESE	ESE	ESE	ESE	ESE	ESE	E	E	E	ESE	E	ESE	E	E	ENE	NE	WSW	SW	W	W	W	WNW	NW
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	on	on	on	on	on	on	on	on	on	on	on	on	on	cross-on	cross-on	cross-on	cross-off	cross-off	cross-off	off	cross-off	off	off
High Tide					3:56PM2.06m				4:12AM1.86m				4:25PM1.99m				4:42AM1.77m				4:54PM1.87m
Low Tide			9:46AM0.03m				10:12PM0.03m				10:15AM0.09m				10:40PM0.11m				10:42AM0.20m


	6:43	—	—	—	—	—	—	—	6:41	—	—	—	—	—	—	—	6:39	—	—	—	—	—	—
	—	—	—	—	6:27	—	—	—	—	—	—	—	6:28	—	—	—	—	—	—	—	6:29	—	—
mm	—	—	2	4	4	—	—	1	1	1	1	1	—	—	—	—	—	—	2	2	—	—	—
Temp °C	16	16	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	17	17	20	17	16
Feels °C	11	11	9	8	7	8	8	8	6	8	8	10	9	13	13	14	14	13	15	14	16	15	15
Swell 1 Height (m) Direction Period (s)	SSW 15	SSW 15	SSW 15	SSW 17	SSW 17	SSW 16	SSW 16	SSW 15	SSW 15	SSW 15	SSW 14	SSW 14	SSW 14	SSW 14	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10
kJ	188	372	600	1032	1553	1393	1341	1139	1010	857	742	577	460	379	1820	1532	1299	1172	990	804	706	616	533
Swell 2 Height (m) Direction Period (s)	SSW 10	S 10	S 9	S 10	S 9	S 9	—	—	—	—	—	—	—	—	SSW 13	SSW 13	SSW 13	SSW 12	SSW 12	SSW 12	SW 12	SW 12	SSW 12
kJ	78	70	44	47	39	25	—	—	—	—	—	—	—	—	336	265	253	196	169	161	164	190	90
Swell 3 Height (m) Direction Period (s)	SW 11	—	S 14	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	WSW 8	WSW 8
kJ	64	—	4	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	67	23
Wind waves Height (m) Direction Period (s)	ESE 6	ESE 6	ESE 6	ESE 7	ESE 7	ESE 8	ESE 8	ESE 9	ESE 9	ESE 9	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	—	—	W 3	WSW 6	WSW 7	W 7	W 7	—
kJ	190	218	257	406	684	1155	1397	2165	2497	2608	2779	2810	2525	2216	2306	—	—	7	18	41	254	374	—
Nearest Offshore or Glassy	De Kelders Overberg	Bikini Beach (Gordon's Bay) Cape Town	De Kelders Overberg	Ding Dangs Garden Route	Ding Dangs Garden Route	Off The Wall Cape Town	Dumps Cape Town	Strand (Pipe) Cape Town	Bikini Beach (Gordon's Bay) Cape Town	Bikini Beach (Gordon's Bay) Cape Town	De Kelders Overberg	De Kelders Overberg	Hawston Overberg	De Kelders Overberg	Voelklip Overberg	Pearly Beach Overberg	Cape Infanta Overberg	Onrus Overberg	Cape Infanta Overberg	Arniston Overberg	Cape Infanta Overberg	Arniston Overberg	Arniston Overberg
Rating (10 max)	3	1	4	2	3	5	4	4	2	2	4	4	4	3	3	3	3	3	3	4	2	4	3
Distance (km)	81	139	81	183	183	191	184	144	139	139	81	81	107	81	93	76	65	103	65	0	65	0	0
Best forecast wave conditions in Overberg	De Kelders		Hawston						Koeel Bay	Koeel Bay	Hawston	Hawston	Hawston	Voelklip	Kleinmond	Kleinmond	Bettys Bay	Kanon	Kleinmond	Arniston	Dolphin Point	Arniston	Arniston
Rating (10 max)	3		4						3	4	4	4	4	4	4	4	3	3	3	4	4	4	3
Best forecast wave conditions in South Africa	Hell West Coast	Strandfontein West Coast	Gerickes Point Garden Route	Santos Reef Garden Route	Santos Reef Garden Route	Fish Boma Garden Route	Fish Boma Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Fish Boma Garden Route	Fish Boma Garden Route	Goukamma River Mouth Garden Route	Goukamma River Mouth Garden Route	Noncom (Cape Recife) Eastern Cape (S)	Noncom (Cape Recife) Eastern Cape (S)	Goukamma River Mouth Garden Route	Periwinkles Eastern Cape - Wild Coast	Periwinkles Eastern Cape - Wild Coast
Rating (10 max)	4	4	4	3	4	5	5	5	5	5	5	5	5	4	5	4	4	4	4	4	4	8	4
Header Global	Trial Harbour Australia	Shipwrecks Bay-Peaks New Zealand	White Rock - The Spit New Zealand	White Rock - The Spit New Zealand	Asu Indonesia	Asu Indonesia	Asu Indonesia	Asu Indonesia	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Gerickes Point South Africa	Frigates Fiji	Fish Boma South Africa	Namotu Lefts Fiji	Cobblestones Australia	Cow Bombie Australia	Restaurants Fiji	Gas Bay Australia	Gas Bay Australia	Hole-in-the-Wall South Africa	Cloudbreak Fiji
Rating (10 max)	8	7	7	6	5	5	5	5	9	8	7	6	5	5	5	5	6	6	5	6	6	8	5

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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Arniston 48 hour detailed Surf Forecast

How big are the waves at Arniston today (12 Sep):

Short Range Forecast

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