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Surf Forecasts:

I and Js surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Sunday 11 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 Tuesday (Jan 13) at 11PM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.3m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at I and Js in the next 12 days are 3.5m 12s and forecast to arrive on Sunday (Jan 18) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Thursday (Jan 15) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Tue 13th Jan)5.5ft (1.7m) 11s
Best Surf11PM (Tue 13th Jan)5.5ft (1.7m) 11s
Most Powerful11AM (Sun 18th Jan)11ft (3.5m) 12s

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 Mostly dry. Warm (max 24°C on Sun afternoon, min 19°C on Mon night). Winds decreasing (fresh winds from the SE on Sun night, calm by Tue night).

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Wed night. Warm (max 21°C on Wed afternoon, min 17°C on Thu morning). Winds decreasing (strong winds from the SE on Thu afternoon, light winds from the S by Sat morning).

Sun
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
1
2
0
1
2
1
2
1
0
0
0
0
0
0
0
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
SW
1.9
SW
2.3
SW
2.1
SW
1.8
SW
1.6
SW
1.8
SW
1.6
SW
1.5
SW
1.6
SW
3
SW
3
SSW
2
SW
1.6
SW
1.2
SSW
1.7
S
1.3
S
1.2
SW
1.4
SW
2.4
SW
3.5
SSW
Period(s) (?)211614131212111111111312111110999101012
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6401988209015378997237706505536113028247193556126147127523036511113282
Wind
(km/h)
30
SSE
30
SSE
15
S
25
S
20
SSE
15
SSW
20
SSW
10
SSE
15
WNW
20
WNW
35
SSE
45
SE
45
SE
30
SE
25
S
30
S
25
S
15
WSW
25
SW
25
SW
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		cross-
on		crosscrosscrosscross-
on		cross-
on		cross-
on		onononcross-
on
High Tide
/ height (m)
9:51PM
0.96
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
Low Tide
/ height (m)
3:45PM
0.55
3:40AM
0.63
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
Sun
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunrise--5:47--5:48--5:48--5:50--5:50--5:52--5:52
Sunset8:00--8:00--8:00--8:00--8:00--8:00--8:00--
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
rain showers
cloud
cloud
part cloud
rain showers
rain showers
part cloud
clear
clear
part cloud
part cloud
Rain (mm)
----------2---11-----
Temp. °C242121212020212120212118181818181818191919
Feels °C (?)221920201819202121192011101116121316151515
  • 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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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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