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Surf Forecasts:

I and Js surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Thursday 12 Mar 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
17.9° C
 (Which is 1.7°C colder than average for this time of year)

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 Thursday (Mar 19) at 5AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.8m and 16s. 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 2.2m 15s and forecast to arrive on Thursday (Mar 19) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Tuesday (Mar 17) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 19th Mar)6ft (1.8m) 16s
Best Surf 5AM (Thu 19th Mar)6ft (1.8m) 16s
Most Powerful11AM (Thu 19th Mar)7ft (2.2m) 15s

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

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

Short Range Forecast Mostly dry. Warm (max 27°C on Thu afternoon, min 19°C on Fri night). Winds increasing (light winds from the SSW on Thu afternoon, strong winds from the SE by Sat afternoon).

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Sun afternoon, min 19°C on Mon night). Winds increasing (light winds from the SE on Mon morning, strong winds from the SE by Tue night).

Thu
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
0
2
0
1
0
0
0
0
0
1
0
0
0
0
0
0
1
0
2
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.2
SW
1.2
SW
1.1
WSW
1.9
WSW
2.1
WSW
1.8
WSW
1.5
WSW
1.1
SW
0.9
SW
0.7
SSW
1.3
SSW
1.6
SSW
1.6
SSW
2.5
S
1.5
SSW
1.4
SSW
1.3
SSW
1.2
SW
1.4
SW
1.5
SSW
2.2
SSW
Period(s) (?)12121816151313121114131212811111112131315
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4164037511811184711107223191981775607226587705464664113937007222348
Wind
(km/h)
15
S
15
SE
20
SSE
25
SSE
30
SSE
40
SE
45
SE
30
ESE
20
SE
30
SSE
20
SE
20
SSE
25
SE
35
SE
35
SE
40
SSE
35
SE
15
SE
30
SE
15
ESE
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscross-
on		cross-
on		crosscrosscrosscross-
off		crosscrosscrosscross-
on		crosscrosscrosscrosscrosscrosscrosscross-
off		cross
High Tide
/ height (m)
11:35PM
0.93
11:50AM
0.99
12:44AM
1.06
12:49PM
1.11
1:20AM
1.21
1:27PM
1.24
1:51AM
1.36
2:01PM
1.36
2:20AM
1.50
2:34PM
1.46
2:50AM
1.61
3:07PM
1.54
3:21AM
1.70
Low Tide
/ height (m)
4:56PM
0.66
5:55AM
0.70
6:29PM
0.56
6:56AM
0.57
7:10PM
0.43
7:32AM
0.43
7:41PM
0.30
8:03AM
0.29
8:10PM
0.19
8:33AM
0.16
8:40PM
0.10
9:05AM
0.05
9:11PM
0.03
9:37AM
-0.03
Thu
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Sunrise--6:43--6:43--6:45--6:46--6:47--6:47--6:48
Sunset7:08--7:07--7:06--7:05--7:04--7:01--7:00--
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
Rain (mm)
---------------------
Temp. °C272423222019202021222022222119192022232120
Feels °C (?)262422211814141419201821212015151822211822
  • 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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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

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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