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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 pm Thursday 21 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
16.5° C
(Which is slightly cooler than normal)How big are the waves at Extensions today?
The current surf forecast for Extensions at 8PM is: 0.7m 12s primary swell from a Southwest direction and 0.5m 3s secondary swell from a Northwest direction (forecast issued at 01:00pm May 21). An open ocean swell of 0.7m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 2.5ft (0.7m) | 13s |
| Afternoon (21 May) | 2.5ft (0.8m) | 12s |
| Evening (21 May) | 2ft (0.6m) | 19s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 18°C on Thu afternoon, min 16°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 13 | SW 12 | SW 12 | SW 12 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | |
199 | 175 | 147 | 144 | 227 | 314 | 379 | 427 | 504 | 574 | 813 | 733 | 757 | 821 | 787 | 690 | 591 | 629 | 459 | 833 | 1077 | 924 | 859 | 721 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | glassy | cross-on | cross | cross-on | glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 7:12PM1.32m | 7:37AM1.17m | 8:23PM1.26m | 8:56AM1.09m | 9:38PM1.25m | |||||||||||||||||||
Low Tide | 12:48PM0.29m | 1:33AM0.40m | 1:52PM0.39m | 2:54AM0.46m | 3:06PM0.45m | 4:17AM0.45m | ||||||||||||||||||
 | | |  | |  |  |  |  | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | — | 7:37 | — | — | — | — | — | — | — | 7:37 | — |
 | — | — | 5:49 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | 5:46 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 18 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 |
15 | 15 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 18 | 16 | 16 | 15 | 16 | 17 | 17 | 15 | 15 | 14 | 14 | 15 | 16 | 14 | 14 | |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SW 12 | SW 12 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 |
 kJ | 110 | 91 | 64 | 144 | 137 | 314 | 379 | 427 | 504 | 574 | 813 | 733 | 757 | 821 | 787 | 690 | 591 | 629 | 459 | 833 | 1077 | 924 | 859 | 721 |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SSE 7 | SSE 7 | SW 11 | SW 11 | S 6 | S 6 | SSW 6 | SSW 6 | S 6 | S 6 | S 6 | SSE 6 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SSE 13 | SSE 13 | SSE 12 | SW 17 |
| kJ | 199 | 175 | 147 | 48 | 42 | 126 | 101 | 26 | 43 | 56 | 58 | 56 | 45 | 35 | 20 | 82 | 153 | 120 | 120 | 104 | 17 | 17 | 15 | 281 |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SW 20 | SW 20 | SW 20 | SW 19 | S 7 | S 6 | SW 11 | SW 10 | WSW 11 | S 10 | SSE 10 | S 10 | SSE 9 | SW 5 | SSE 6 | SW 16 | SE 6 | SW 11 | SSE 14 | W 11 | W 11 | W 11 | SSE 12 |
| kJ | 11 | 65 | 136 | 134 | 227 | 34 | 31 | 101 | 112 | 99 | 8 | 9 | 7 | 8 | 8 | 14 | 94 | 9 | 217 | 18 | 2 | 2 | 2 | 15 |
Wind waves Height (m) Direction Period (s) | NNW 2 | NNW 3 | NNW 3 | NW 3 | NW 3 | NW 3 | — | — | — | — | — | — | — | — | — | — | — | — | SSE 6 | SE 6 | SE 6 | SSE 3 | SE 6 | SE 5 |
| kJ | 1 | 5 | 8 | 6 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 14 | 9 | 8 | 5 | 5 | 7 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 5 | 12 | 5 | 0 | 0 | 0 | 0 | 0 | 12 | 12 | 12 | 0 | 0 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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