Surf Forecasts:
Extensions surf forecast from 7 Nov 2026:
- Best quality surf: Friday 20 Nov, 8AM (local time) - 7.5ft (2.3m), 11s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 16 Nov, 11PM (local time) - 11ft (3.5m), 14s period, SSW swell with 4,664 kJ wave energy.
- Next surfable swell (1★+): Monday 9 Nov, 5AM (local time) - 3.5ft (1.1m), 11s period with SW 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 Monday (Nov 09) at 5AM. The primary swell is predicted to be 1.1m and 11s period with a secondary swell of 0.8m 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 3.5m 14s and forecast to arrive on Monday (Nov 16) 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 3.0m 7s period and expected on Tuesday (Nov 17) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 9th Nov) | 3.5ft (1.1m) 11s |
| Best Surf | 8AM (Fri 20th Nov) | 7.5ft (2.3m) 11s |
| Most Powerful | 11PM (Mon 16th Nov) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Extensions over the next 16 days.
Short Range ForecastMostly dry. Warm (max 22°C on Sun afternoon, min 14°C on Sat night). Winds decreasing (near gales from the ESE on Sat night, calm by Mon morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 16°C on Wed night). Winds increasing (light winds from the SW on Tue night, fresh winds from the SE by Thu night). | |||||||||||||||||||
Sat 7 | Sunday 8 | Monday 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | ||||||||||||||
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 14 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SW 10 | SW 10 | SW 10 | WSW 13 | WSW 12 | WSW 11 | SW 14 | SW 13 | SW 12 | WSW 12 | SW 12 | SW 11 | SSW 10 | SSW 13 | SW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 4831 | 2210 | 1044 | 829 | 249 | 180 | 150 | 81 | 454 | 444 | 444 | 758 | 2596 | 2183 | 1694 | 1470 | 990 | 349 | 1144 | 1229 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | cross-off | off | glassy | cross-off | cross-off | cross-off | cross | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:25AM1.41m | 2:30PM1.52m | 2:56AM1.43m | 3:01PM1.50m | 3:27AM1.43m | 3:33PM1.47m | 3:58AM1.40m | 4:04PM1.41m | 4:30AM1.35m | 4:37PM1.34m | 5:05AM1.29m | 5:10PM1.25m | ||||||||
Low Tide | 8:20PM0.10m | 8:26AM0.22m | 8:50PM0.09m | 8:58AM0.21m | 9:20PM0.10m | 9:29AM0.23m | 9:49PM0.14m | 10:01AM0.27m | 10:20PM0.20m | 10:33AM0.32m | 10:51PM0.27m | 11:07AM0.40m | 11:25PM0.34m | |||||||
 |  | | | | | | | | | | | | |  | | | | | | |
 | — | — | 5:39 | — | — | 5:37 | — | — | 5:37 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — |
 | 7:20 | — | — | 7:21 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:23 | — | — | 7:24 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 18 | 22 | 21 | 21 | 20 | 18 | 17 | 18 | 18 | 18 | 18 | 18 | 16 | 17 | 16 | 16 | 16 | 16 |
Feels °C | 8 | 7 | 12 | 18 | 15 | 19 | 16 | 16 | 14 | 15 | 16 | 17 | 16 | 17 | 11 | 12 | 10 | 10 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SW 10 | SW 10 | SW 10 | WSW 13 | WSW 12 | WSW 11 | SW 14 | SW 13 | SW 12 | WSW 12 | SW 12 | SW 11 | SSW 10 | SSW 13 | SW 12 |
| kJ | 4831 | 2210 | 1044 | 829 | 249 | 180 | 150 | 60 | 454 | 444 | 444 | 758 | 2596 | 2183 | 1694 | 1470 | 990 | 349 | 1144 | 1229 |
Swell 2 Height (m) Direction Period (s) | WNW 12 | NW 11 | SSE 7 | NW 11 | SW 11 | S 10 | S 10 | S 9 | S 9 | SW 16 | SE 9 | W 10 | W 10 | — | SW 21 | SW 20 | SW 18 | W 11 | W 10 | SW 18 |
| kJ | 14 | 5 | 97 | 5 | 217 | 123 | 90 | 58 | 38 | 40 | 23 | 290 | 31 | — | 17 | 15 | 13 | 286 | 218 | 465 |
Swell 3 Height (m) Direction Period (s) | — | — | NW 11 | W 13 | S 13 | SE 7 | SW 19 | WSW 14 | SSW 11 | SSW 11 | NW 11 | SE 9 | — | — | SW 21 | — | E 10 | SW 13 | SW 22 | W 11 |
| kJ | — | — | 5 | 3 | 3 | 48 | 15 | 81 | 24 | 11 | 5 | 3 | — | — | 17 | — | 2 | 136 | 18 | 108 |
Wind waves Height (m) Direction Period (s) | SSE 5 | SE 6 | ESE 6 | SE 7 | SE 7 | — | SE 8 | SSE 4 | SSE 4 | SSE 10 | SW 4 | — | — | — | — | S 5 | — | SSE 4 | SSE 4 | SE 4 |
| kJ | 56 | 163 | 187 | 255 | 253 | — | 53 | 18 | 13 | 56 | 3 | — | — | — | — | 43 | — | 10 | 24 | 38 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 454 | 41 | 18 | 12 | 12 | 0 | 26 | 34 | 12 | 26 | 1 | 5 | 30 | 26 | 337 | 337 | 33 | 1285 | 417 | 37 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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