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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 Wednesday 20 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
16.6° C
(Which is slightly cooler than normal)How big are the waves at Extensions today?
The current surf forecast for Extensions at 7PM is: 0.6m 11s primary swell from a West-southwest direction (forecast issued at 01:00pm May 20). An open ocean swell of 1.4m 8s is not directed at the surf break, a second open ocean swell of 2.2m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2.5ft (0.8m) | 12s |
| Afternoon (20 May) | 2.5ft (0.7m) | 12s |
| Evening (20 May) | 2ft (0.6m) | 11s |
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 19°C on Wed afternoon, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 14 | SW 13 | SW 13 | 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 | |
180 | 123 | 119 | 81 | 68 | 121 | 113 | 140 | 199 | 175 | 147 | 144 | 227 | 314 | 379 | 427 | 504 | 651 | 486 | 733 | 757 | 821 | 787 | 690 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 6:11PM1.39m | 6:31AM1.30m | 7:12PM1.32m | 7:37AM1.17m | 8:23PM1.26m | |||||||||||||||||||
Low Tide | 11:53AM0.18m | 00:24AM0.31m | 12:48PM0.29m | 1:33AM0.40m | 1:52PM0.39m | 2:54AM0.46m | ||||||||||||||||||
 | | |  | | |  |  | | | | | | |  | |  | | | | | | | | |
 | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | — | 7:37 | — |
 | — | — | 5:49 | — | — | — | — | — | — | — | 5:49 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | 5:46 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 18 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 16 |
11 | 15 | 17 | 17 | 18 | 20 | 18 | 18 | 17 | 16 | 15 | 15 | 16 | 17 | 17 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | |
Swell 1 Height (m) Direction Period (s) | SSE 11 | WSW 12 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SW 13 | SSE 8 | SW 12 | SSE 7 | SW 12 | SW 18 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | S 6 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 |
 kJ | 157 | 123 | 330 | 248 | 197 | 171 | 149 | 110 | 199 | 91 | 147 | 54 | 137 | 314 | 50 | 64 | 80 | 98 | 115 | 733 | 757 | 821 | 787 | 690 |
Swell 2 Height (m) Direction Period (s) | WSW 12 | SSE 11 | WSW 12 | WSW 11 | SSE 11 | SW 14 | SW 13 | SW 13 | S 7 | SW 12 | S 6 | SW 12 | SSW 6 | SSW 6 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | S 6 | S 6 | S 6 | S 6 | S 6 |
| kJ | 180 | 111 | 119 | 81 | 78 | 121 | 113 | 140 | 44 | 175 | 29 | 144 | 30 | 35 | 379 | 427 | 504 | 651 | 486 | 78 | 60 | 44 | 33 | 33 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SW 15 | SSE 11 | SSE 11 | WSW 11 | SSE 11 | WSW 11 | WSW 11 | SE 8 | SW 20 | SE 8 | SW 20 | SW 19 | SW 11 | SW 11 | SW 11 | SW 11 | WSW 11 | WSW 11 | S 10 | S 10 | S 9 | S 9 | SSE 9 |
| kJ | 25 | 36 | 82 | 84 | 68 | 47 | 46 | 40 | 64 | 66 | 35 | 134 | 227 | 126 | 101 | 101 | 115 | 99 | 99 | 8 | 7 | 7 | 7 | 8 |
Wind waves Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | — | — | — | — | — | — | NW 3 | NW 3 | NW 3 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 634 | 479 | 728 | 640 | — | — | — | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 26 | 12 | 12 | 12 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 20 | 5 | 12 | 26 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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