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Surf Forecasts:

I and Js surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 am Monday 12 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
20.3° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for I and Js this week:

The surf forecast for I and Js over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jan 14) at 8AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.2m and 12s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at I and Js in the next 12 days are 3.0m 15s and forecast to arrive on Wednesday (Jan 14) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Thursday (Jan 15) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 14th Jan)5ft (1.6m) 11s
Best Surf 8AM (Wed 14th Jan)5ft (1.6m) 11s
Most Powerful 8PM (Wed 14th Jan)10ft (3.0m) 15s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 2mm), mostly falling on Wed night. Warm (max 21°C on Mon morning, min 17°C on Wed night). Winds increasing (calm on Wed morning, fresh winds from the SSE by Wed night).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Sat night. Very mild (max 19°C on Sat afternoon, min 17°C on Thu morning). Winds decreasing (strong winds from the SE on Thu afternoon, light winds from the S by Fri night).

Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
0
1
2
0
1
1
3
0
0
0
0
0
0
1
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.4
SW
2.2
SW
1.8
SW
1.7
SW
1.8
SW
1.7
SW
1.6
SW
2.5
SW
3
SW
3
SSW
3
SSW
1.6
SW
1.4
SSW
0.9
SW
1.1
SW
1
SW
1.3
SW
1.8
SW
2.5
SW
2.4
SW
2.1
SW
Period(s) (?)1413121211111116131211111010101099101111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)23831643970792836701650335328702899204959337113921118129453113511291963
Wind
(km/h)
15
SSE
25
S
20
SSE
15
SSW
25
SSW
15
SSE
15
WNW
20
NW
35
SSE
40
SE
45
SE
30
SE
25
S
30
S
15
SSE
15
WNW
25
SW
20
W
25
SSW
25
S
35
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
on		oncross-
on		crosscross-
on		crosscross-
on		crosscrosscrosscross-
on		cross-
on		cross-
on		cross-
on		oncross-
on		cross-
on		cross-
on		cross
High Tide
/ height (m)
10:13AM
1.09
11:22PM
0.97
11:33AM
1.09
12:36AM
1.03
12:39PM
1.14
1:27AM
1.11
1:29PM
1.21
2:07AM
1.20
2:09PM
1.29
2:42AM
1.29
2:45PM
1.36
3:15AM
1.37
3:18PM
1.41
3:46AM
1.45
Low Tide
/ height (m)
5:10PM
0.55
5:18AM
0.65
6:24PM
0.51
6:36AM
0.60
7:17PM
0.43
7:29AM
0.52
7:58PM
0.35
8:10AM
0.43
8:33PM
0.27
8:46AM
0.36
9:05PM
0.20
9:19AM
0.29
9:35PM
0.14
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Sunrise5:47--5:48--5:48--5:50--5:50--5:52--5:52--
Sunset-8:00--8:00--8:00--8:00--8:00--8:00--8:00-
part cloud
clear
clear
clear
clear
clear
clear
clear
rain showers
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
rain showers
rain showers
rain showers
part cloud
part cloud
Rain (mm)
--------2-------121--
Temp. °C212120202020202020171717181818181919191919
Feels °C (?)212018201818181718999141314161715151414
  • 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

Latest Updates

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Discover more articles and updates in the Greenroom.

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Quick surf report for I and Js:

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FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for I and Js at:
surf-forecast.com

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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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