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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 7 am Monday 18 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
16.7° C
(Which is slightly cooler than normal)How big are the waves at Extensions today?
The current surf forecast for Extensions at 12PM is: 1.7m 14s primary swell from a West-southwest direction (forecast issued at 07:00am May 18). An open ocean swell of 2.1m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 5.5ft (1.7m) | 14s |
| Afternoon (18 May) | 5ft (1.6m) | 14s |
| Evening (18 May) | 5ft (1.5m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 20°C on Wed afternoon, min 16°C on Mon morning). Winds decreasing (near gales from the ESE on Mon night, light winds from the N by Wed night). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 14 | |
1018 | 1053 | 1244 | 999 | 975 | 796 | 772 | 745 | 624 | 536 | 528 | 520 | 451 | 402 | 325 | 260 | 226 | 184 | 180 | 123 | 119 | 82 | 68 | 119 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | off | cross-off | off | off | cross-off | |
High Tide | 4:28PM1.51m | 4:43AM1.54m | 5:17PM1.46m | 5:34AM1.43m | 6:11PM1.39m | |||||||||||||||||||
Low Tide | 10:16AM-0.00m | 10:34PM0.14m | 11:03AM0.08m | 11:26PM0.22m | 11:53AM0.18m | 00:24AM0.31m | ||||||||||||||||||
 |  |  | | |  |  | | | | | | | | | | | | | |  | | | | |
 | 7:33 | — | — | — | — | — | — | — | 7:33 | — | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | 7:35 |
 | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:49 | — | — | 5:49 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 16 | 17 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 19 | 18 | 16 | 17 | 17 | 17 | 17 | 17 | 19 | 20 | 20 | 19 | 18 |
10 | 10 | 10 | 10 | 7 | 7 | 7 | 7 | 7 | 8 | 10 | 14 | 10 | 7 | 9 | 12 | 13 | 12 | 13 | 16 | 17 | 19 | 18 | 18 | |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | SSE 11 | SSE 11 | SSE 11 | WSW 11 | SE 8 | SSE 8 |
 kJ | 1018 | 1053 | 1244 | 999 | 975 | 796 | 772 | 745 | 624 | 536 | 528 | 520 | 451 | 402 | 325 | 260 | 226 | 184 | 157 | 157 | 109 | 82 | 319 | 235 |
Swell 2 Height (m) Direction Period (s) | S 14 | SW 16 | — | SSW 15 | — | S 18 | S 18 | S 16 | — | — | SSE 15 | SSE 15 | SSE 14 | SW 10 | — | S 20 | SSE 12 | SW 16 | WSW 12 | WSW 12 | WSW 12 | SSE 11 | SSE 11 | SW 14 |
| kJ | 93 | 69 | — | 144 | — | 6 | 6 | 5 | — | — | 22 | 21 | 40 | 4 | — | 8 | 87 | 11 | 180 | 123 | 119 | 82 | 82 | 119 |
Swell 3 Height (m) Direction Period (s) | S 14 | — | S 13 | — | — | — | — | — | — | — | — | — | SSW 10 | — | — | — | — | — | SSW 16 | SW 15 | SW 15 | SW 15 | WSW 11 | WSW 11 |
| kJ | 59 | — | 55 | — | — | — | — | — | — | — | — | — | 19 | — | — | — | — | — | 25 | 36 | 56 | 75 | 68 | 47 |
Wind waves Height (m) Direction Period (s) | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SSE 8 | SSE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 9 | — |
| kJ | 164 | 220 | 282 | 353 | 652 | 981 | 1161 | 1510 | 1717 | 1776 | 1327 | 787 | 645 | 1201 | 1509 | 1297 | 1010 | 901 | 542 | 571 | 428 | 373 | 853 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 37 | 37 | 48 | 37 | 48 | 48 | 48 | 48 | 48 | 47 | 37 | 25 | 30 | 48 | 37 | 25 | 18 | 25 | 25 | 18 | 12 | 0 | 0 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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