I and Js surfForecast / Cape Town / South Africa

information circle16 Day Weather and Surf, issued 1 pm Monday 06 Apr 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
19.8° C
(Which is 1.1°C warmer than normal 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 Wednesday (Apr 08) at 8AM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 1.3m 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 16 days are 4.0m 14s and forecast to arrive on Monday (Apr 06) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 7s period and expected on Sunday (Apr 12) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 8th Apr)5ft (1.6m) 13s
Best Surf 8AM (Wed 8th Apr)5ft (1.6m) 13s
Most Powerful 5PM (Mon 6th Apr)13ft (4.0m) 14s

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 Mostly dry. Warm (max 23°C on Wed morning, min 15°C on Tue morning). Winds decreasing (fresh winds from the SE on Tue night, calm by Wed morning).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Sat morning. Warm (max 25°C on Thu night, min 18°C on Sat morning). Wind will be generally light.

Mon
06
Tuesday
07
Wednesday
08
Thursday
09
Friday
10
Saturday
11
Sunday
12
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
2
4
1
3
4
3
1
3
2
4
3
3
3
3
2
2
3
0
1
1
Swell
Height Map
Wave Height (m) & direction (?)
4
SSW
3.5
SSW
2.5
S
2
S
1.8
S
1.5
S
1.6
SW
1.5
SW
1.6
SW
1.3
SW
2.3
SW
2.1
SW
1.9
SW
2.1
SW
2.1
SW
1.9
SW
1.6
SW
1.9
S
1.1
SW
1
SW
0.8
SW
Period(s) (?)14131313131312111216151413131313128111110
Wave
Graph
(?)Metric surfscale
Energy kJ (?)55493893232314401021726650553650823214817851280148214381191761489309228153
Wind
(km/h)
25
SSE
30
SE
20
SE
30
SE
20
ESE
0
W
15
SSW
15
SSE
10
SE
15
SE
10
N
15
NW
15
SW
5
NNW
15
W
15
WSW
10
WNW
10
NE
15
S
15
SSE
15
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
crosscross-
off
crosscross-
off
glassoncrosscrosscrosscross-
off
crossoncrosscross-
on
oncross-
on
offcross-
on
crosscross-
off
High Tide
/ height (m)
5:32PM
1.25
5:39AM
1.25
6:05PM
1.15
6:13AM
1.14
6:49PM
1.05
7:01AM
1.03
8:09PM
0.97
8:38AM
0.95
10:20PM
0.98
10:47AM
0.98
11:41PM
1.09
Low Tide
/ height (m)
11:30PM
0.39
11:53AM
0.39
12:02AM
0.50
12:29PM
0.49
12:44AM
0.61
1:26PM
0.59
2:10AM
0.70
3:24PM
0.63
4:49AM
0.68
5:15PM
0.57
Mon
06
Tuesday
07
Wednesday
08
Thursday
09
Friday
10
Saturday
11
Sunday
12
Sunrise--7:03--7:03--7:03--7:05--7:05--7:05--7:07
Sunset6:35--6:34--6:32--6:30--6:30--6:29--6:27--
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
rain showers
mod rain
thunderstorm
rain showers
rain showers
rain showers
clear
clear
Rain (mm)
-------------575231--
Temp. °C181717202023232020232524212018191918191918
Feels °C (?)131314161622211920222422202119191819181817
  • Map Icons:
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  • 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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