I and Js Surf Break

Lat Long: 34.16° S 18.33° E

I and Js Surf Forecast and Surf Report

Issued: 1 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's I and Js sea temperature is
15.3° C
0.2° 

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


I and Js surf forecast from 30 Jul 2026:

  • Best quality surf: Monday 3 Aug, 11AM (local time) - 4.5ft (1.4m), 13s period, WSW swell with glassy winds.
  • Most powerful swell: Wednesday 5 Aug, 2PM (local time) - 11ft (3.5m), 15s period, WSW swell with 5,270 kJ wave energy.
  • Next surfable swell (1★+): Thursday 30 Jul, 5AM (local time) - 5ft (1.6m), 13s period with SW swell.

Best Forecast Surf Conditions for I and Js this week:

The surf forecast for I and Js over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 30) at 5AM. The primary swell is predicted to be 1.6m and 13s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at I and Js in the next 16 days are 3.5m 15s and forecast to arrive on Wednesday (Aug 05) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Friday (Jul 31) at 2AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 30th Jul)5ft (1.6m) 13s
Best Surf11AM (Mon 3rd Aug)4.5ft (1.4m) 13s
Most Powerful 2PM (Wed 5th Aug)11ft (3.5m) 15s

Table - best surf conditions forecast for I and Js over the next 16 days.


Short Range Forecast

Mostly dry. Warm (max 22°C on Fri afternoon, min 15°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Sun morning, min 13°C on Mon morning). Wind will be generally light.

Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
3
2
1
2
3
2
3
3
2
3
4
4
3
2
1
2
4
3
5
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
13
1.5
SW
13
1.3
SW
13
1.3
SW
12
1.1
SW
12
0.7
WSW
16
1.3
WSW
14
1.2
SW
13
1.3
SW
13
1.3
SW
13
1.3
SW
12
1
SW
14
1.4
WSW
13
1.6
WSW
13
1.7
SW
12
1.5
SW
11
1.2
WSW
11
1.3
SW
16
3.5
SW
15
3.5
WSW
14
3.5
WSW
14
Wave Graph
Metric surfscale
Energy kJ
821
732
600
471
355
255
663
486
552
527
528
357
700
835
822
534
305
875
5190
4977
4343
Wind (km/h)
5
ESE
15
SE
10
ENE
10
SE
10
SE
10
ESE
5
E
5
S
10
E
15
NNW
15
NW
10
NNW
5
NNW
10
SSW
5
SSW
5
WNW
10
WSW
15
NW
25
N
25
NNW
25
N
Wind State
cross-off
cross
cross-off
cross-off
cross
cross-off
glassy
cross-on
cross-off
cross-off
cross
cross-off
glassy
on
glassy
cross
cross-on
cross
cross-off
cross-off
cross-off
High Tide
4:03PM1.48m
4:09AM1.43m
4:33PM1.52m
4:40AM1.42m
5:03PM1.53m
5:13AM1.39m
5:34PM1.52m
5:47AM1.34m
6:08PM1.48m
6:27AM1.27m
6:48PM1.41m
7:14AM1.18m
7:38PM1.32m
Low Tide
9:51AM0.13m
10:11PM0.22m
10:18AM0.12m
10:42PM0.20m
10:47AM0.12m
11:13PM0.20m
11:16AM0.16m
11:47PM0.22m
11:48AM0.21m
00:24AM0.26m
12:25PM0.29m
1:09AM0.32m
1:10PM0.38m
2:07AM0.39m
part cloud
clear
clear
clear
part cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:41
7:39
7:39
7:39
7:37
7:37
7:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:04
6:05
6:06
6:07
6:07
6:07
6:08
 mm
Temp °C
15
17
18
19
22
21
21
22
22
18
18
16
14
15
15
14
14
14
13
15
16
Feels °C
13
14
15
15
18
18
18
19
18
14
14
14
13
13
13
13
12
13
9
10
11
  • 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
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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 I and Js 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 I and Js Surf forecast

The above surf forecast table for I and Js provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at I and Js can be found by selecting the local surf guide option on the grey menu. Our I and Js 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 (I and Js) 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 I and Js 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.

Are you planning a holiday in Cape Town? If you are looking for accommodation near I and Js, camping, hotels and holiday cottages in Cape Town, consider staying in Cape Town which is 28 km (17 miles) away. Other places in and around Cape Town where you can find information about places to rent, and car hire include Bellville which is 40 km (25 miles) away, Robben Island, Stellenbosch and Kayamnandi.

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