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Extensions Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Extensions surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Tuesday 12 May 2026 SASTForecast update in hr min s Forecast update imminent
Extensions surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Extensions sea temperature is
17.7° C
(Which is normal for this time of year)How big are the waves at Extensions today?
The current surf forecast for Extensions at 8AM is: 4.0m 12s primary swell from a West direction and 3.0m 13s secondary swell from a South-southwest direction, 4.0m 12s secondary swell from a West direction (forecast issued at 01:00am May 12). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 13ft (4.0m) | 12s |
| Afternoon (12 May) | 10ft (3.0m) | 13s |
| Evening (12 May) | 10ft (3.0m) | 12s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Tue morning. Very mild (max 17°C on Tue afternoon, min 14°C on Wed night). Winds decreasing (strong winds from the W on Tue night, calm by Thu night). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
WNW 12 | W 12 | W 12 | W 12 | SW 13 | SW 13 | W 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | |
7944 | 5587 | 4930 | 3919 | 3511 | 3049 | 2759 | 2457 | 2426 | 2318 | 2897 | 3060 | 3429 | 3230 | 2928 | 2452 | 2037 | 1753 | 1527 | 1220 | 955 | 823 | 656 | 586 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | glassy | glassy | glassy | on | on | |
High Tide | 11:22PM1.27m | 11:55AM1.17m | 00:11AM1.39m | 12:45PM1.29m | 00:56AM1.50m | 1:30PM1.39m | ||||||||||||||||||
Low Tide | 5:51AM0.39m | 5:54PM0.39m | 6:39AM0.25m | 6:43PM0.30m | 7:22AM0.12m | 7:29PM0.21m | ||||||||||||||||||
 |  |  | |  |  |  |  |  | |  | | | | | | | |  | | | | | | |
 | — | 7:28 | — | — | — | — | — | — | — | 7:30 | — | — | — | — | — | — | — | 7:31 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:53 | — | — | — | — | — | — | — | 5:52 | — | — |
3 | 9 | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 16 | 16 | 16 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 16 |
9 | 10 | 11 | 13 | 12 | 12 | 10 | 9 | 7 | 8 | 8 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 13 | 15 | |
Swell 1 Height (m) Direction Period (s) | SW 13 | W 12 | W 12 | W 12 | SW 13 | SW 13 | W 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 |
 kJ | 3299 | 5587 | 4930 | 3919 | 3511 | 3049 | 2759 | 2299 | 2216 | 2318 | 2897 | 3060 | 3429 | 3230 | 2928 | 2452 | 2037 | 1753 | 1527 | 1220 | 955 | 823 | 656 | 586 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | SW 13 | SSW 13 | SSW 13 | W 12 | W 12 | SSW 12 | — | — | WSW 12 | W 12 | W 12 | W 11 | W 11 | W 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 12 | WSW 12 | WSW 11 | WSW 13 |
| kJ | 15 | 3916 | 3169 | 3214 | 2386 | 2180 | 2338 | — | — | 379 | 1947 | 1644 | 1371 | 1147 | 1023 | 944 | 828 | 759 | 679 | 716 | 811 | 718 | 303 | 522 |
Swell 3 Height (m) Direction Period (s) | SE 10 | NNW 10 | NNW 10 | SE 12 | — | NW 9 | — | — | — | — | — | SE 11 | SE 11 | — | — | — | SW 20 | SW 19 | WSW 19 | SW 18 | WSW 18 | WSW 17 | WSW 13 | WSW 16 |
| kJ | 4 | 941 | 756 | 6 | — | 323 | — | — | — | — | — | 5 | 4 | — | — | — | 15 | 15 | 36 | 81 | 123 | 119 | 204 | 402 |
Wind waves Height (m) Direction Period (s) | WNW 12 | W 13 | W 12 | NW 9 | NW 10 | W 12 | W 12 | W 12 | W 12 | W 12 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7944 | 5063 | 4148 | 721 | 614 | 1624 | 2459 | 2457 | 2426 | 2079 | 1621 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 339 | 318 | 20 | 20 | 20 | 30 | 30 | 187 | 187 | 187 | 187 | 26 | 25 | 20 | 20 | 5 | 5 | 5 | 12 | 0 | 0 | 0 | 1 | 1 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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