I and Js surfForecast / Cape Town / South Africa

information circle16 Day Weather and Surf, issued 7 pm Thursday 26 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
15.6° C
(Which is 3.6°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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Mar 27) at 5AM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.5m and 13s. 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 2.4m 13s and forecast to arrive on Thursday (Apr 02) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Tuesday (Mar 31) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Fri 27th Mar)4.5ft (1.4m) 9s
Best Surf 5AM (Fri 27th Mar)4.5ft (1.4m) 9s
Most Powerful 2AM (Thu 2nd Apr)8ft (2.4m) 13s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 2mm), mostly falling on Fri night. Very mild (max 19°C on Thu night, min 17°C on Fri morning). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Wed afternoon, min 17°C on Sun night). Mainly fresh winds.

Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wednesday
01
Thu
02
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
3
1
0
2
2
3
4
4
2
1
0
0
0
2
0
0
1
0
2
2
0
Swell
Height Map
Wave Height (m) & direction (?)
1.6
SW
1.3
SW
1.3
WSW
1.6
WSW
2.5
SW
3
SW
2.1
SW
1.8
SW
1.8
SW
1.1
SW
0.9
SW
0.7
WSW
0.9
SW
0.6
SW
0.7
SW
1
SW
1.2
SW
1.5
SW
2.4
SW
2.2
SW
2
SW
Period(s) (?)109981111101013121211111415131414131212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)450249238330148418299536021021325202103163123212345573813188613581094
Wind
(km/h)
5
S
20
NNW
20
NW
15
NNW
15
WNW
15
WSW
10
SSE
10
S
20
S
20
SE
15
SSE
25
SSE
20
SE
5
SSE
25
SSE
30
SSE
15
SE
25
SSE
20
SSE
15
SSW
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
off
crosscross-
off
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscrosscross-
on
crosscross-
on
crosscrosscrosscross-
on
cross-
on
cross-
on
cross-
on
High Tide
/ height (m)
10:41PM
1.07
11:23AM
1.09
12:11AM
1.19
12:38PM
1.19
1:05AM
1.33
1:26PM
1.30
1:45AM
1.45
2:05PM
1.39
2:18AM
1.54
2:38PM
1.45
2:49AM
1.60
3:09PM
1.48
3:18AM
1.61
3:38PM
1.49
Low Tide
/ height (m)
5:12AM
0.56
5:51PM
0.47
6:35AM
0.43
6:52PM
0.36
7:25AM
0.30
7:35PM
0.25
8:04AM
0.18
8:10PM
0.18
8:37AM
0.10
8:42PM
0.13
9:07AM
0.05
9:12PM
0.11
9:36AM
0.04
Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wednesday
01
Thu
02
Sunrise-6:54--6:54--6:56--6:56--6:56--6:58--6:58-
Sunset--6:49--6:46--6:45--6:45--6:43--6:42--6:40
part cloud
clear
part cloud
rain showers
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
Rain (mm)
---2-----------------
Temp. °C191819191819191818181819181819182122191919
Feels °C (?)191616181618181716151617141818162021181918
  • 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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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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