Surf Forecasts:
Extensions surf forecast from 10 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 11PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,697 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 11PM (local time) - 3.5ft (1.0m), 10s period with SSW swell.
Best Forecast Surf Conditions for Extensions this week:
The surf forecast for Extensions over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 12) at 11PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.6m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Extensions in the next 16 days are 3.0m 14s and forecast to arrive on Wednesday (Jul 15) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Friday (Jul 10) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 12th Jul) | 3.5ft (1.0m) 10s |
| Best Surf | 8PM (Wed 15th Jul) | 10ft (3.0m) 14s |
| Most Powerful | 11PM (Wed 15th Jul) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Extensions over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun afternoon, min 13°C on Fri morning). Winds decreasing (strong winds from the SE on Fri night, light winds from the ESE by Sun night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Wed night, min 14°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | W 10 | SW 16 | W 10 | W 9 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2230 | 1805 | 1507 | 1240 | 784 | 744 | 394 | 302 | 214 | 111 | 80 | 138 | 157 | 153 | 129 | 371 | 2454 | 3550 | 2381 | 1883 | 1336 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | off | off | cross-off | glassy | cross-on | on | glassy | glassy | cross | cross-off | on | on | cross-on |
High Tide | 11:40AM1.15m | 11:57PM1.34m | 12:49PM1.24m | 1:04AM1.42m | 1:48PM1.35m | 2:02AM1.49m | 2:40PM1.47m | 2:55AM1.55m | 3:28PM1.56m | 3:43AM1.57m | 4:13PM1.61m | 4:28AM1.54m | 4:56PM1.62m | ||||||||
Low Tide | 5:36PM0.45m | 6:34AM0.27m | 6:51PM0.37m | 7:35AM0.17m | 7:54PM0.26m | 8:28AM0.09m | 8:48PM0.17m | 9:15AM0.02m | 9:38PM0.10m | 9:59AM-0.00m | 10:25PM0.08m | 10:41AM0.01m | 11:11PM0.10m | ||||||||
 |  |  |  | |  | | | | | | | | | | | | | | | | |
 | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — |
 | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 14 | 14 | 17 | 15 | 14 | 18 | 17 | 15 | 16 | 16 | 15 | 16 | 15 | 15 | 16 | 17 | 16 | 17 | 17 |
Feels °C | 5 | 5 | 5 | 7 | 9 | 7 | 9 | 13 | 12 | 12 | 14 | 15 | 12 | 14 | 13 | 15 | 15 | 16 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | W 10 | W 10 | W 10 | W 9 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 |
| kJ | 2230 | 1805 | 1507 | 1240 | 784 | 744 | 394 | 302 | 214 | 111 | 80 | 138 | 156 | 153 | 129 | 371 | 2454 | 3550 | 2381 | 1883 | 1336 |
Swell 2 Height (m) Direction Period (s) | W 14 | W 13 | W 12 | W 11 | W 12 | W 11 | W 11 | W 11 | W 10 | SSE 9 | S 9 | SSE 10 | SW 16 | SSE 9 | SW 17 | SW 11 | W 9 | ESE 9 | — | — | — |
| kJ | 37 | 82 | 136 | 116 | 172 | 160 | 114 | 108 | 69 | 90 | 57 | 72 | 157 | 44 | 107 | 137 | 74 | 15 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 20 | SW 12 | WSW 17 | SW 16 | SW 15 | SW 15 | W 10 | W 9 | SSW 9 | S 9 | SW 12 | SW 12 | W 8 | ESE 9 | — | — | — | — |
| kJ | — | — | — | 7 | 72 | 28 | 40 | 35 | 34 | 66 | 40 | 49 | 43 | 52 | 51 | 68 | 33 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 8 | SE 7 | — | — | — | — | — | WSW 4 | — | — | — | — | — | — |
| kJ | 170 | 207 | 269 | 244 | 261 | 194 | 235 | 204 | 91 | — | — | — | — | — | 2 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 37 | 37 | 37 | 30 | 26 | 25 | 18 | 12 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 12 | 0 | 1 | 3 | 26 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Extensions 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 Extensions Surf forecast
The above surf forecast table for Extensions provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Extensions can be found by selecting the local surf guide option on the grey menu. Our Extensions 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 (Extensions) 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 Extensions 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 Extensions, camping, hotels and holiday cottages in Cape Town, consider staying in Cape Town which is 45 km (28 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 51 km (32 miles) away, Grabouw, Stellenbosch and Kayamnandi.
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