- Forecast
- Maps
- Live
- Weather State
- Spot Information
I and Js surfForecast / Cape Town / South Africa
12 Day Weather and Surf, issued 7 am Friday 09 May 2025 SAST
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 Friday (May 09) at 11AM. The primary swell is predicted to be 2.1m and 13s period with a secondary swell of 0.5m and 10s. 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 5.0m 12s and forecast to arrive on Saturday (May 10) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Friday (May 09) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 9th May) | 7ft (2.1m) 13s |
| Best Surf | 8AM (Sun 11th May) | 8ft (2.4m) 12s |
| Most Powerful | 2PM (Sat 10th May) | 16ft (5.0m) 12s |
Table - best surf conditions forecast for I and Js over the next 12 days.
Friday 09 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 7 | 12 | 12 | 12 | 11 | 13 | 12 | 12 | 12 | 13 | 14 | 14 | 13 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 12 | 12 | 12 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 13 | 13 | 17 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 1534 | 1009 | 760 | 5662 | 6827 | 3640 | 1898 | 1750 | 1068 | 603 | 1775 | 2972 | 3717 | 3523 | 2681 | 2091 | 1622 | 880 | 666 | 599 | 570 | 422 | 337 | 478 | 1999 | 1488 | 836 | 569 | 305 | 582 | 469 | 319 | 270 | 83 | 84 | 77 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | cross- off | cross | cross- off | cross | cross- on | cross | cross | cross | cross | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | on | cross- on | cross | cross | cross | cross | glass | cross | cross- off | cross- on | cross- on | cross- on |
High Tide / height (m) | 1:44PM 1.27 | 1:47AM 1.41 | 2:14PM 1.33 | 2:17AM 1.44 | 2:44PM 1.36 | 2:47AM 1.46 | 3:14PM 1.38 | 3:18AM 1.45 | 3:44PM 1.37 | 3:49AM 1.42 | 4:16PM 1.35 | 4:21AM 1.37 | 4:49PM 1.30 | 4:55AM 1.31 | 5:27PM 1.26 | 5:32AM 1.25 | 6:12PM 1.21 | 6:19AM 1.18 | 7:08PM 1.17 | 7:21AM 1.11 | 8:17PM 1.17 | 8:42AM 1.08 | 9:32PM 1.22 | |||||||||||||
Low Tide / height (m) | 7:43PM 0.34 | 8:10AM 0.20 | 8:14PM 0.30 | 8:38AM 0.17 | 8:44PM 0.28 | 9:06AM 0.15 | 9:14PM 0.27 | 9:35AM 0.16 | 9:44PM 0.28 | 10:05AM 0.19 | 10:15PM 0.32 | 10:36AM 0.23 | 10:49PM 0.37 | 11:11AM 0.28 | 11:26PM 0.42 | 11:50AM 0.34 | 12:13AM 0.48 | 12:38PM 0.40 | 1:15AM 0.53 | 1:39PM 0.44 | 2:35AM 0.54 | 2:54PM 0.46 | 4:01AM 0.48 | |||||||||||||
Friday 09 | Saturday 10 | Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | |||||||||||||||||||||||||
| Sunrise | 7:26 | - | - | 7:28 | - | - | 7:28 | - | - | 7:28 | - | - | 7:30 | - | - | 7:31 | - | - | 7:31 | - | - | 7:31 | - | - | 7:33 | - | - | 7:33 | - | - | 7:33 | - | - | 7:35 | - | - |
| Sunset | - | 5:58 | - | - | 5:57 | - | - | 5:55 | - | - | 5:55 | - | - | 5:54 | - | - | 5:53 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 | - | - | 5:51 | - | - | 5:51 | - | - | 5:50 | - |
 |  |  |  | |  | | |  | | | | | | | | | | | | | | |  |  | | | | | | | | |  | | | |
Rain (mm) | - | - | 3 | 2 | 2 | 6 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 7 | - | - |
| Temp. °C | 16 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 15 | 14 | 15 | 15 | 17 | 20 | 22 | 23 | 24 | 25 | 23 | 21 | 23 | 22 | 23 | 18 | 17 | 17 | 15 | 15 | 16 | 15 | 14 | 15 | 16 | 16 | 15 | 15 |
| Feels °C (?) | 15 | 13 | 10 | 8 | 8 | 10 | 15 | 14 | 13 | 12 | 13 | 14 | 13 | 17 | 18 | 20 | 20 | 22 | 19 | 17 | 19 | 18 | 18 | 17 | 14 | 12 | 11 | 10 | 11 | 10 | 12 | 12 | 9 | 10 | 6 | 10 |
Short Range Forecast: Moderate rain (total 13mm), heaviest on Fri night. Very mild (max 17°C on Fri afternoon, min 15°C on Sat night). Winds decreasing (strong winds from the NNW on Fri night, calm by Sun morning). | Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Wed night, min 14°C on Mon morning). Wind will be generally light. | Days 6-9 Weather Summary Mostly dry. Warm (max 23°C on Thu morning, min 15°C on Sat night). Winds increasing (light winds from the NNW on Thu night, fresh winds from the SE by Sat night). | Long Range Forecast: Light rain (total 7mm), mostly falling on Tue morning. Very mild (max 16°C on Sun afternoon, min 14°C on Sun morning). Winds increasing (calm on Mon morning, near gales from the NNW by Mon night). | |||||||||||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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.
Nearest