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Surf Forecasts:
Nine Mile Reef surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 pm Monday 18 May 2026 SASTForecast update in hr min s Forecast update imminent
Nine Mile Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nine Mile Reef sea temperature is
17.0° C
(Which is normal for this time of year)How big are the waves at Nine Mile Reef today?
The current surf forecast for Nine Mile Reef at 12AM is: 1.9m 8s primary swell from a South-southeast direction and 0.8m 13s secondary swell from a Southwest direction, 0.2m 12s secondary swell from a South-southeast direction (forecast issued at 07:00pm May 18). The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 7ft (2.1m) | 9s |
| Afternoon (19 May) | 10ft (3.0m) | 8s |
| Evening (19 May) | 6ft (1.8m) | 10s |
Table - waves today at Nine Mile Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Wed afternoon. Warm (max 21°C on Tue afternoon, min 16°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 14 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 9 | SE 8 | SE 8 | SE 10 | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 11 | SW 13 | SW 13 | SW 13 | SW 12 | |
308 | 410 | 464 | 488 | 638 | 716 | 591 | 1109 | 261 | 575 | 452 | 433 | 282 | 250 | 844 | 754 | 760 | 133 | 408 | 40 | 88 | 87 | 84 | 74 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross | glassy | glassy | cross-on | cross | cross-off | off | off | off | cross-off | |
High Tide | 4:28PM1.53m | 4:43AM1.56m | 5:17PM1.48m | 5:34AM1.44m | 6:10PM1.40m | 6:30AM1.31m | ||||||||||||||||||
Low Tide | 10:34PM0.15m | 11:02AM0.08m | 11:26PM0.22m | 11:52AM0.19m | 00:24AM0.32m | 12:48PM0.30m | ||||||||||||||||||
 |  |  | | | |  | | | | | | | | | |  |  | | | |  | | | |
 | — | — | — | — | 7:33 | — | — | — | — | — | — | — | 7:33 | — | — | — | — | — | — | — | 7:33 | — | — | — |
 | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:49 | — | — | — | — | — | — | 5:47 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | |
Temp °C | 20 | 18 | 17 | 17 | 17 | 17 | 19 | 21 | 21 | 18 | 17 | 17 | 17 | 16 | 18 | 21 | 19 | 19 | 19 | 19 | 18 | 17 | 19 | 21 |
17 | 15 | 14 | 14 | 14 | 15 | 17 | 19 | 19 | 16 | 15 | 16 | 16 | 15 | 18 | 21 | 19 | 19 | 19 | 19 | 18 | 16 | 18 | 19 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SSE 8 | S 10 | SW 13 | SW 13 | SW 12 | SW 12 | SSE 11 | SE 8 | SSE 8 | SSE 8 | SSE 11 | SSE 8 | S 7 | S 7 | SSE 7 | S 7 | S 7 |
 kJ | 308 | 290 | 235 | 228 | 168 | 173 | 171 | 379 | 120 | 104 | 103 | 74 | 72 | 71 | 169 | 150 | 120 | 46 | 88 | 35 | 34 | 57 | 38 | 25 |
Swell 2 Height (m) Direction Period (s) | S 8 | SSE 12 | SSE 12 | S 12 | S 16 | S 16 | S 15 | SW 13 | SW 13 | SSE 14 | SSE 14 | SSE 13 | SSE 12 | SW 12 | SSE 11 | SSE 11 | SSE 11 | SW 11 | SSE 11 | SE 8 | SW 13 | SW 13 | SW 13 | SW 12 |
| kJ | 93 | 30 | 15 | 11 | 5 | 5 | 18 | 138 | 136 | 36 | 36 | 32 | 31 | 51 | 91 | 68 | 64 | 20 | 39 | 24 | 88 | 87 | 84 | 74 |
Swell 3 Height (m) Direction Period (s) | SSE 13 | — | S 18 | S 17 | — | — | — | SSE 15 | SSE 14 | SSW 9 | — | — | — | S 17 | SW 12 | SW 12 | SW 12 | SSW 15 | SSW 14 | SSE 11 | SE 8 | SSE 11 | SSE 11 | SSE 11 |
| kJ | 31 | — | 6 | 6 | — | — | — | 21 | 19 | 9 | — | — | — | 5 | 50 | 50 | 35 | 42 | 41 | 40 | 25 | 12 | 11 | 12 |
Wind waves Height (m) Direction Period (s) | SE 5 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 9 | SE 8 | SE 8 | SE 10 | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | — | — | — | — | WNW 2 |
| kJ | 100 | 410 | 464 | 488 | 638 | 716 | 591 | 1109 | 261 | 575 | 452 | 433 | 282 | 250 | 844 | 754 | 760 | 133 | 408 | — | — | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 31 | 27 | 26 | 16 | 27 | 26 | 16 | 16 | 22 | 22 | 16 | 16 | 12 | 12 | 12 | 10 | 12 | 16 | 10 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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