I and Js surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 7 am Thursday 01 Jan 2026 SAST
Forecast update in hr  min  s Forecast update imminent
I and Js surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's I and Js sea temperature is
16.8° C
(Which is 2.9°C colder than average for this time of year)


Best Forecast Surf Conditions for I and Js this week:

The most powerful waves expected at I and Js in the next 12 days are 2.1m 15s and forecast to arrive on Saturday (Jan 03) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 6s period and expected on Sunday (Jan 04) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Sat 3rd Jan)7ft (2.1m) 15s

Table - best surf conditions forecast for I and Js over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 22°C on Fri afternoon, min 19°C on Fri night). Winds increasing (light winds from the WSW on Thu night, strong winds from the SSE by Sat afternoon).

Days 3-6 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 18°C on Sun night). Winds decreasing (strong winds from the SSE on Sun afternoon, light winds from the WSW by Tue night).

Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
2
2
0
1
1
0
0
0
0
0
0
1
1
2
1
2
2
2
3
Swell
Height Map
Wave Height (m) & direction (?)
1
SW
1.5
SW
1.2
SW
1.1
SW
1
WSW
1.6
WSW
2.1
WSW
1.8
WSW
1.5
WSW
1.2
WSW
1.1
SW
1.2
SW
1.3
WSW
1.4
WSW
1.4
SW
1.6
SW
1.6
WSW
2.2
SSW
2.3
SW
2.2
SW
2.1
SW
Period(s) (?)131312121816141413121212111112111112111010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)330699428319659130517481314734397330414433475480627560129712461020869
Wind
(km/h)
20
S
25
S
10
SSW
10
W
25
SSW
30
SSE
35
SSE
45
SSE
40
SE
40
SE
45
SSE
35
SE
25
S
20
S
20
SSE
15
SW
20
WSW
20
SW
15
SW
15
SW
10
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
oncross-
on
cross-
on
crosscrosscrosscrosscrosscrosscrosscross-
on
cross-
on
cross-
on
onononononcross-
on
High Tide
/ height (m)
1:36PM
1.48
2:16AM
1.42
2:29PM
1.54
3:04AM
1.50
3:17PM
1.56
3:49AM
1.56
4:03PM
1.55
4:33AM
1.58
4:46PM
1.50
5:15AM
1.56
5:28PM
1.42
5:56AM
1.51
6:10PM
1.31
Low Tide
/ height (m)
8:04PM
0.10
8:21AM
0.21
8:52PM
0.04
9:12AM
0.14
9:37PM
0.01
9:59AM
0.11
10:19PM
0.02
10:45AM
0.12
10:59PM
0.06
11:29AM
0.17
11:38PM
0.13
12:12PM
0.24
12:15AM
0.23
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Sunrise5:37--5:37--5:39--5:39--5:41--5:41--5:41--
Sunset-8:00--8:00--8:00--8:01--8:01--8:01--8:01-
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
Rain (mm)
---------------------
Temp. °C212121212221202019202120202121202121202020
Feels °C (?)201920222220171513141513171920201922191819
  • 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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Quick surf report for I and Js:

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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.


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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 12 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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