J-Bay Surf Forecast

/ Eastern Cape (S) (37 surf breaks) /

South Africa (273 surf breaks) / Lat Long: (34.05° S 24.93° E)

Surf Forecasts:

J-Bay surfForecast / Eastern Cape (S) / South Africa

12 Day Weather and Surf, issued 1 am Wednesday 17 Sep 2025 SAST

Forecast update in hr min s Forecast update imminent

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

Today's J-Bay sea temperature is 18.6° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for J-Bay this week:

The surf forecast for J-Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 17) at 8PM. The primary swell is predicted to be 4.0m and 13s period with a secondary swell of 0.9m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at J-Bay in the next 12 days are 4.5m 13s and forecast to arrive on Wednesday (Sep 17) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Saturday (Sep 20) at 11PM.

Wave Type	Time (SAST) & Date	Wave Height & Period
Next good surf (1 star+)	8PM (Wed 17th Sep)	13ft (4.0m) 13s
Best Surf	8PM (Wed 17th Sep)	13ft (4.0m) 13s
Most Powerful	11AM (Wed 17th Sep)	15ft (4.5m) 13s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Mostly dry. Warm (max 20°C on Fri afternoon, min 11°C on Wed night). Winds increasing (light winds from the N on Thu night, fresh winds from the ENE by Fri night).									Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Mon afternoon. Warm (max 23°C on Mon morning, min 14°C on Mon night). Winds increasing (calm on Sat morning, gales from the W by Mon afternoon).
	Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	6	4	5	3	2	4	0	0	0	4	2	1	2	0	0	1	1	4	3	3	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	SSW	SSW	SSW	SSW	SSW	S	S	SSE	SSE	SSE	SSE	SSE	SSE	E	E	E	WSW	SW	SW	SSW
Period(s) (?)	13	13	12	12	12	12	12	13	13	13	12	12	12	11	9	8	8	7	10	11	10
Wave Graph (?)
kJ (?)	6543	5448	3518	2205	2341	1637	563	771	669	660	540	361	288	263	281	387	659	811	3516	3252	1455
Wind (km/h)	WSW	SW	WNW	WSW	SW	NNW	E	E	ENE	SSE	WSW	WSW	S	ESE	E	W	WSW	WNW	WSW	SW	S
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	off	cross- off	cross- off	cross- off	cross- on	on	cross- on	glass	cross- off	cross- off	cross	on	cross- on	off	cross- off	off	cross- off	cross- off	cross- on
High Tide / height (m)	1:27PM 1.27		1:43AM 1.30		2:07PM 1.43	2:20AM 1.42		2:39PM 1.57	2:51AM 1.51		3:07PM 1.67	3:19AM 1.58		3:34PM 1.73	3:46AM 1.61		3:59PM 1.75	4:12AM 1.61		4:24PM 1.73	4:37AM 1.58
Low Tide / height (m)		7:43PM 0.45		7:56AM 0.34		8:21PM 0.31	8:29AM 0.22		8:52PM 0.20	8:57AM 0.13		9:20PM 0.12	9:23AM 0.08		9:45PM 0.08	9:47AM 0.05		10:10PM 0.06	10:12AM 0.06		10:33PM 0.08

	Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
Sunrise	6:16	-	-	6:16	-	-	6:13	-	-	6:13	-	-	6:11	-	-	6:09	-	-	6:09	-	-
Sunset	-	6:12	-	-	6:13	-	-	6:14	-	-	6:14	-	-	6:15	-	-	6:15	-	-	6:15	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	2	2	-	-	2
Temp. °C	17	17	14	17	17	14	18	20	18	21	22	19	20	19	18	23	21	16	18	19	16
Feels °C (?)	10	10	11	13	11	12	13	14	14	21	22	13	18	17	16	17	7	11	13	13	14

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 Eastern Cape (S)

Wind Update Continuing clean conditions at J-Bay (light winds from the W at Springfield wx 57 km from J-Bay). 5.5m 13s groundswell from the SW with a 4.2m 13s groundswell, also from the SW. 2 swells combining so expect closeout sets.
1 hour 38 minutes ago J-Bay

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our J-Bay 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 J-Bay Surf forecast

The above surf forecast table for J-Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at J-Bay can be found by selecting the local surf guide option on the grey menu. Our J-Bay 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 (J-Bay) 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 J-Bay 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.

J-Bay is 19 km (12 miles) from the city of Kruisfontein. If you plan a holiday in Eastern Cape (South), look for hotels and other accommodation in Kruisfontein. Kruisfontein has rooms for a wide range of budgets as well as car hire and transport links.