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I and Js surfForecast / Cape Town / South Africa
12 Day Weather and Surf, issued 7 pm Monday 30 Jun 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 Monday (Jun 30) at 11PM. The primary swell is predicted to be 1.8m and 12s period with a secondary swell of 0.8m and 16s. Another secondary swell of 0.9m and 5s is also forecast. 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 4.0m 13s and forecast to arrive on Sunday (Jul 06) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Tuesday (Jul 01) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 30th Jun) | 6ft (1.8m) 12s |
| Best Surf | 11AM (Sat 5th Jul) | 11ft (3.5m) 15s |
| Most Powerful | 5AM (Sun 6th Jul) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for I and Js over the next 12 days.
Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Sat 12 | |||||||||||||||||||||||||
| 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 | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 11 | 13 | 12 | 12 | 14 | 14 | 13 | 13 | 12 | 12 | 15 | 14 | 13 | 13 | 12 | 12 | 13 | 12 | 13 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 13 | 12 | 11 | 11 | 11 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 1214 | 2101 | 2103 | 2109 | 3092 | 2544 | 2558 | 3015 | 2856 | 2281 | 1461 | 2001 | 3631 | 5554 | 5057 | 5056 | 5484 | 4410 | 3590 | 3636 | 3354 | 3158 | 2677 | 2646 | 2657 | 2852 | 2918 | 2318 | 1898 | 2636 | 1765 | 1288 | 964 | 714 | 851 | 2435 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | glass | cross | cross- off | on | on | cross- on | cross- off | cross- off | cross- off | cross- on | cross- on | cross | cross- on | on | cross- on | glass | cross- on | cross- on | cross- off | cross | cross- off | cross- off | cross- off | off | cross- on | cross | glass | cross- off | cross- off | cross- off | cross- off | cross |
High Tide / height (m) | 7:19AM 1.14 | 7:48PM 1.28 | 8:11AM 1.06 | 8:38PM 1.21 | 9:13AM 1.01 | 9:36PM 1.16 | 10:25AM 0.99 | 10:40PM 1.14 | 11:36AM 1.02 | 11:43PM 1.15 | 12:36PM 1.07 | 12:39AM 1.19 | 1:25PM 1.14 | 1:28AM 1.25 | 2:07PM 1.22 | 2:10AM 1.31 | 2:45PM 1.29 | 2:49AM 1.36 | 3:21PM 1.36 | 3:26AM 1.41 | 3:57PM 1.42 | 4:02AM 1.43 | 4:32PM 1.47 | |||||||||||||
Low Tide / height (m) | 1:25AM 0.41 | 1:21PM 0.40 | 2:16AM 0.47 | 2:07PM 0.49 | 3:14AM 0.51 | 3:04PM 0.56 | 4:19AM 0.52 | 4:15PM 0.60 | 5:26AM 0.50 | 5:30PM 0.60 | 6:25AM 0.46 | 6:34PM 0.55 | 7:14AM 0.40 | 7:25PM 0.49 | 7:57AM 0.33 | 8:09PM 0.42 | 8:34AM 0.26 | 8:48PM 0.36 | 9:10AM 0.20 | 9:25PM 0.30 | 9:44AM 0.15 | 10:02PM 0.26 | 10:17AM 0.12 | |||||||||||||
Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Sat 12 | |||||||||||||||||||||||||
| Sunrise | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:50 | - | - | 7:50 | - |
| Sunset | - | - | 5:46 | - | - | 5:47 | - | - | 5:47 | - | - | 5:49 | - | - | 5:49 | - | - | 5:50 | - | - | 5:50 | - | - | 5:51 | - | - | 5:51 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 |
 |  |  |  |  |  | | |  |  | | |  | | | | | | | |  |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | 3 | 5 | 7 | 3 | 5 | 1 | 2 | - | 1 | 45 | 10 | 1 | 7 | 3 | - | 4 | - | - | - | - | - | - | - | - | 6 | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 14 | 16 | 15 | 14 | 14 | 15 | 13 | 14 | 15 | 14 | 14 | 13 | 14 | 14 | 15 | 13 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 13 | 12 | 12 | 13 | 14 | 12 | 13 | 13 | 13 | 15 |
| Feels °C (?) | 11 | 9 | 12 | 10 | 14 | 14 | 11 | 5 | 8 | 9 | 6 | 4 | 6 | 13 | 11 | 7 | 5 | 4 | 5 | 9 | 9 | 8 | 8 | 7 | 9 | 8 | 8 | 5 | 9 | 10 | 13 | 9 | 8 | 9 | 10 | 9 |
Short Range Forecast: Heavy rain (total 24mm), heaviest during Wed afternoon. Very mild (max 16°C on Tue afternoon, min 13°C on Mon night). Winds increasing (calm on Wed morning, strong winds from the SSW by Thu morning). | Days 3-6 Weather Summary Heavy rain (total 69mm), heaviest during Fri night. Very mild (max 15°C on Thu night, min 12°C on Sat morning). Mainly strong winds. | Days 6-9 Weather Summary Light rain (total 4mm), mostly falling on Sun night. Very mild (max 13°C on Mon afternoon, min 11°C on Tue night). Wind will be generally light. | Long Range Forecast: Light rain (total 6mm), mostly falling on Wed night. Very mild (max 15°C on Sat afternoon, min 9°C on Wed night). Winds increasing (calm on Thu night, fresh winds from the NW by Sat night). | |||||||||||||||||||||||||||||||||
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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.
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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