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Surf Forecasts:

I and Js surfForecast / Cape Town / South Africa

information circle16 Day Weather and Surf, issued 1 am Friday 20 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
17.3° C
 (Which is 2.2°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 Tuesday (Mar 24) at 5AM. The primary swell is predicted to be 2.1m and 13s period. 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 2.5m 15s and forecast to arrive on Monday (Mar 23) at 2PM. 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 7s period and expected on Monday (Mar 23) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 24th Mar)7ft (2.1m) 13s
Best Surf 5AM (Tue 24th Mar)7ft (2.1m) 13s
Most Powerful 2PM (Mon 23rd Mar)8ft (2.5m) 15s

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

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

Short Range Forecast Some drizzle, heaviest during Fri morning. Very mild (max 19°C on Fri morning, min 17°C on Sat morning). Winds increasing (light winds from the SW on Fri morning, strong winds from the SE by Sun night).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Tue night. Warm (max 23°C on Mon afternoon, min 18°C on Mon morning). Winds decreasing (strong winds from the SE on Mon night, calm by Tue morning).

Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
2
0
0
0
0
0
0
0
0
3
4
3
3
0
2
2
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
3
SW
2.4
SW
2.1
SSW
1.7
SSW
1.7
SSW
1.7
SSW
1.5
SW
1.4
SW
1.6
SSW
2.2
SSW
2.5
SSW
2.2
SSW
1.9
SSW
1.8
SSW
2
SSW
2
SSW
2.1
S
1.6
S
1.1
SW
0.8
SW
0.9
SSW
Period(s) (?)1010121212121111111614141313121198101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1799107011778648787565635126632447258917481226106611381008716356234120178
Wind
(km/h)
20
SW
25
SSW
25
SSE
30
SE
35
SSE
35
SE
35
SE
45
SSE
45
SE
40
SE
40
SE
20
ESE
5
NE
10
NW
20
NNW
20
W
15
WSW
15
SE
25
SE
30
SSE
25
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononcrosscrosscrosscrosscrosscrosscrosscrosscrosscross-
off		glasscrosscross-
off		cross-
on		cross-
on		crosscrosscrosscross
High Tide
/ height (m)
4:15PM
1.58
4:28AM
1.71
4:52PM
1.53
5:05AM
1.64
5:30PM
1.44
5:45AM
1.51
6:14PM
1.31
6:32AM
1.35
7:09PM
1.18
7:36AM
1.18
8:35PM
1.06
9:22AM
1.07
10:41PM
1.07
Low Tide
/ height (m)
10:10AM
-0.05
10:16PM
0.02
10:45AM
-0.03
10:52PM
0.08
11:23AM
0.06
11:31PM
0.18
12:04PM
0.18
12:15AM
0.31
12:54PM
0.33
1:13AM
0.46
2:06PM
0.48
2:52AM
0.58
4:07PM
0.54
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Sunrise6:48--6:50--6:50--6:50--6:52--6:52--6:52--
Sunset-6:58--6:57--6:55--6:53--6:52--6:51--6:50-
rain showers
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
rain showers
clear
clear
clear
clear
clear
Rain (mm)
1-------------12-----
Temp. °C191919181818181918202321232220202019191918
Feels °C (?)171515131211121311151815242220181917151412
  • 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 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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