Kosi Bay 48 hour detailed Surf Forecast

Lat Long: 26.87° S 32.89° E

Issued: 1 pm 18 Jul 2026 (local time)

Forecast update in hr min

Today's Kosi Bay sea temperature is

23.7° C

Kosi Bay 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 Kosi Bay today (18 Jul):

Morning surf: Morning surf (18 Jul, local time) - 3.5ft (1.0m), 10s period with E swell.
Afternoon surf: Afternoon surf (18 Jul, local time) - 3ft (0.9m), 10s period with E swell.
Evening surf: Evening surf (18 Jul, local time) - 2.5ft (0.8m), 10s period with E swell.

The current surf forecast for Kosi Bay at 7PM is: 0.8m 10s primary swell from a East direction and 0.5m 11s secondary swell from a South direction (forecast issued at 01:00pm July 18). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.

Time (SAST) & Date	Wave Height	Wave Period
Morning (18 Jul)	3.5ft (1.0m)	10s
Afternoon (18 Jul)	3ft (0.9m)	10s
Evening (18 Jul)	2.5ft (0.8m)	10s

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

	Short Range Forecast Mostly dry. Warm (max 27°C on Sat afternoon, min 18°C on Sun night). Winds decreasing (fresh winds from the S on Mon morning, calm by Mon night).
	Sat 18					Sunday 19								Monday 20
	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	1	1	2	2	2	0	0	0	0	1	1	2	3	3	2	0	0	1	1	3
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	ESE 10	E 10	E 10	E 10	S 14	S 13	S 13	SSE 15	S 14	S 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12
Wave Graph
kJ	160	151	151	117	146	225	273	419	684	298	920	861	872	933	933	986	1030	1000	1032	1173	1039
Wind (km/h)	N	NNE	NNE	NNE	N	W	SSW	S	S	S	SSE	SSE	SSW	SW	SW	SSW	S	SSE	SSE	SE	SE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-on	cross-on	cross-on	cross-on	on	on	cross-on	cross	cross	cross	cross-on	cross-on	cross-on	on	on
High Tide				6:34PM2.10m				6:43AM1.93m				7:10PM1.97m				7:19AM1.79m				7:48PM1.81m
Low Tide		12:16PM0.11m				00:41AM0.30m				12:52PM0.23m				1:18AM0.43m				1:29PM0.39m


	—	—	—	—	—	—	6:35	—	—	—	—	—	—	—	6:35	—	—	—	—	—	—
	—	—	5:13	—	—	—	—	—	—	—	5:14	—	—	—	—	—	—	—	5:14	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	24	27	25	24	22	20	19	20	23	24	22	21	21	19	18	19	22	23	21	21	21
Feels °C	20	23	22	24	23	20	18	19	21	23	21	22	23	20	18	18	18	20	19	20	21
Swell 1 Height (m) Direction Period (s)	ESE 10	E 10	E 10	E 10	E 10	S 13	S 13	SSE 15	S 14	S 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12	SSE 12
kJ	160	151	151	117	117	225	273	419	684	273	920	861	872	933	933	986	1030	1000	1032	1173	1039
Swell 2 Height (m) Direction Period (s)	SSW 13	SSW 12	SSW 11	S 11	S 14	E 10	E 10	S 12	E 10	SSE 13	E 10	E 10	E 10	E 10	E 10	E 10	E 9	E 9	E 9	E 9	E 9
kJ	17	50	43	61	146	117	120	184	96	298	96	96	71	70	68	45	43	42	27	26	26
Swell 3 Height (m) Direction Period (s)	S 15	S 16	S 15	S 15	SSW 10	NE 5	NE 5	E 10	NE 5	E 10	NE 6	NE 6	NE 6	NE 5	NE 5	S 11	S 17	S 17	NE 6	S 10	S 10
kJ	18	21	41	68	35	23	18	122	14	96	20	15	15	7	7	21	6	5	5	17	17
Wind waves Height (m) Direction Period (s)	NNE 4	NNE 5	NNE 5	NNE 5	NE 5	—	—	S 4	S 4	S 4	S 4	S 4	—	—	—	S 4	SSE 5	SSE 6	SSE 6	—	—
kJ	26	39	42	28	22	—	—	12	28	23	8	8	—	—	—	19	78	84	68	—	—
Nearest Offshore or Glassy	St Lucia KZN North	Quissico Inhambane	Sunrise KZN North	Kosi Bay KZN North	Kosi Bay KZN North	Kosi Bay KZN North	Alkantstrand KZN North	Mapelane KZN North	Mapelane KZN North	Quissico Inhambane	Reunion Durban/KZN South	Mtunzini KZN North	Cape Vidal KZN North	Cape Vidal KZN North	Alkantstrand KZN North	Alkantstrand KZN North	Praia de Zavora Inhambane	Alkantstrand KZN North	Reunion Durban/KZN South	Siyayi KZN North	Richards Bay (Inside) KZN North
Rating (10 max)	2	1	2	2	2	2	3	4	4	3	4	3	4	4	4	4	3	4	4	4	3
Distance (km)	173	290	344	0	0	0	228	177	177	290	380	258	144	144	228	228	349	228	380	271	229
Best forecast wave conditions in KwaZulu-Natal North Coast	Richards Bay (Outside)		Umhlanga	Richards Bay (Outside)	Siyayi	Umhlanga	Umhlanga	Umhlanga	Alkantstrand			Umhlanga	Umhlanga	Siyayi	Alkantstrand	Alkantstrand		Alkantstrand		Siyayi	Richards Bay (Outside)
Rating (10 max)	2		2	2	2	3	3	4	4			4	4	4	4	4		4		4	3
Best forecast wave conditions in South Africa	Yellow sands Point Eastern Cape - Wild Coast	Yellow sands Point Eastern Cape - Wild Coast	Gerickes Point Garden Route	Gonubie Reef (The Lefts) Eastern Cape - Wild Coast	Yellow sands Point Eastern Cape - Wild Coast	Gerickes Point Garden Route	Gerickes Point Garden Route	Jongensfontein Overberg	Jongensfontein Overberg	Barbel Point Eastern Cape - Wild Coast	Reunion Durban/KZN South	Kanon Overberg	Vleesbaai Overberg	Goukamma River Mouth Garden Route	Goukamma River Mouth Garden Route	Gerickes Point Garden Route	Gerickes Point Garden Route	Whispering Waves Eastern Cape - Wild Coast	Kromme Rivermouth Eastern Cape (S)	Haga-Haga Eastern Cape - Wild Coast	Vleesbaai Overberg
Rating (10 max)	3	3	3	4	4	3	3	4	4	3	4	4	4	4	4	4	4	4	4	4	3
Header Global	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Otago Peninsula - Allans Beach New Zealand	Otago Peninsula - Allans Beach New Zealand	Otago Peninsula - Allans Beach New Zealand	Dinner Plates New Zealand	White Rock - The Spit New Zealand	Humenga Point New Zealand	Last Chance New Zealand	Diners Beach New Zealand	Diners Beach New Zealand
Rating (10 max)	8	7	6	6	6	6	6	7	7	7	7	7	7	5	5	5	7	5	5	5	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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Kosi Bay 48 hour detailed Surf Forecast

How big are the waves at Kosi Bay today (18 Jul):

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