J-Bay Surf Break

Lat Long: 34.05° S 24.93° E

J-Bay 48 hour detailed Surf Forecast

Issued: 1 am 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's J-Bay sea temperature is
13.8°C
5.2° 

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


How big are the waves at J-Bay today (21 Sep):

  • Morning surf: Morning surf (21 Sep, local time) - 5.5ft (1.7m), 12s period with SW swell.
  • Afternoon surf: Afternoon surf (21 Sep, local time) - 5ft (1.6m), 12s period with SW swell.
  • Evening surf: Evening surf (21 Sep, local time) - 4.5ft (1.4m), 12s period with SW swell.

The current surf forecast for J-Bay at 6AM is: 1.8m 13s primary swell from a Southwest direction and 0.8m 8s secondary swell from a East direction, 0.4m 4s secondary swell from a South-southeast direction (forecast issued at 01:00am September 21). The wind direction is predicted to be glassy and the swell rating is 4.

Time (SAST) & DateWave HeightWave Period
Morning (21 Sep)5.5ft (1.7m)12s
Afternoon (21 Sep)5ft (1.6m)12s
Evening (21 Sep)4.5ft (1.4m)12s

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


Short Range Forecast

Some drizzle, heaviest during Tue night. Warm (max 29°C on Tue afternoon, min 16°C on Mon night). Winds increasing (calm on Mon morning, fresh winds from the WSW by Wed morning).

Monday
21
Tuesday
22
Wednesday
23
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
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
4
4
4
1
0
0
0
0
0
0
1
1
2
0
1
3
3
2
0
0
0
1
2
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
SW
13
1.8
SW
13
1.8
SW
12
1.6
SW
12
1.6
SW
12
1.5
SW
12
1.4
SW
12
1.4
SW
12
1.3
SW
12
1.1
SW
12
1.1
SW
11
0.7
SW
14
0.9
SW
13
1.1
SW
13
1.1
SW
13
1.7
E
8
1.1
SW
12
1.1
SW
12
1.1
SW
12
1.1
SW
11
1.1
SW
11
1
SW
11
0.9
SW
11
0.8
SW
11
Wave Graph
Metric surfscale
Energy kJ
1185
1075
956
785
772
635
561
514
448
337
278
191
286
369
367
338
344
338
332
273
263
224
191
162
Wind (km/h)
0
NNW
0
NNE
5
NNE
10
SE
15
ESE
20
ESE
20
E
20
ENE
20
ENE
15
ENE
15
NE
15
E
10
E
20
E
15
N
5
WSW
10
WNW
20
W
40
WSW
40
WSW
30
WSW
20
SW
10
SW
15
SE
Wind State
glassy
glassy
glassy
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
High Tide
00:28AM1.02m
1:12PM1.11m
1:16AM1.16m
1:43PM1.27m
1:48AM1.30m
2:09PM1.43m
Low Tide
6:53AM0.63m
7:18PM0.62m
7:28AM0.48m
7:49PM0.47m
7:55AM0.34m
8:16PM0.32m
clear
clear
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
part cloud
light rain
part cloud
cloud
cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:15
6:15
 mm
1
Temp °C
17
17
17
19
18
18
18
17
16
16
17
24
29
29
26
24
23
20
17
17
19
18
18
18
Feels °C
18
18
18
19
17
16
17
15
14
15
16
24
30
28
24
24
22
19
12
11
15
16
17
17
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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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.


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