I and Js surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 am Wednesday 31 Dec 2025 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
15.9° C
(Which is 3.7°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 Wednesday (Jan 07) at 8AM. The primary swell is predicted to be 2.0m and 11s period with a secondary swell of 0.4m and 14s. 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 2.1m 15s and forecast to arrive on Saturday (Jan 03) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 6s period and expected on Saturday (Jan 03) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 7th Jan)6.5ft (2.0m) 11s
Best Surf 8AM (Wed 7th Jan)6.5ft (2.0m) 11s
Most Powerful 8AM (Sat 3rd Jan)7ft (2.1m) 15s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 24°C on Wed morning, min 19°C on Fri night). Winds decreasing (fresh winds from the S on Wed afternoon, light winds from the S by Fri morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Mon afternoon, min 19°C on Sat night). Winds decreasing (near gales from the SE on Sat night, light winds from the SE by Mon morning).

Wednesday
31
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
1
0
1
2
0
1
0
0
0
0
0
0
1
0
1
1
0
2
Swell
Height Map
Wave Height (m) & direction (?)
1
SW
1.4
WSW
1
SW
1
SW
1.4
SW
1.2
SW
1.1
SW
1
WSW
1.6
WSW
2.1
WSW
1.8
WSW
1.5
WSW
1.2
WSW
1.1
SW
1.2
SW
1.3
WSW
1.4
WSW
1.3
WSW
1.3
SSW
1.8
SW
1.9
SW
Period(s) (?)111010131312121816141413121212121111101011
Wave
Graph
(?)Metric surfscale
Energy kJ (?)233386200330585421319659130517481314734397325421441483451320650875
Wind
(km/h)
20
S
30
S
25
SSE
20
S
25
S
10
S
15
S
25
S
30
SE
40
SSE
45
SSE
50
SE
45
SE
50
SE
45
SE
20
SE
30
SSE
20
SSE
20
S
25
SSW
20
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
crosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscrosscrosscrosscrosscrosscrosscrosscross-
on
crosscross-
on
cross-
on
cross-
on
High Tide
/ height (m)
12:36PM
1.41
1:23AM
1.31
1:36PM
1.48
2:16AM
1.42
2:29PM
1.54
3:04AM
1.50
3:17PM
1.56
3:49AM
1.56
4:03PM
1.55
4:33AM
1.58
4:46PM
1.50
5:15AM
1.56
5:28PM
1.42
Low Tide
/ height (m)
7:10PM
0.19
7:26AM
0.30
8:04PM
0.10
8:21AM
0.21
8:52PM
0.04
9:12AM
0.14
9:37PM
0.01
9:59AM
0.11
10:19PM
0.02
10:45AM
0.12
10:59PM
0.06
11:29AM
0.17
11:38PM
0.13
Wednesday
31
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Sunrise5:37--5:37--5:37--5:39--5:39--5:41--5:41--
Sunset-8:00--8:00--8:00--8:00--8:01--8:01--8:01-
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
part cloud
Rain (mm)
---------------------
Temp. °C242321212221212121202019222120222320212221
Feels °C (?)232019202120221918161411141312192018202120
  • 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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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.


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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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