Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Nine Mile Reef surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Wednesday 17 Dec 2025 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
18.6° C
(Which is slightly cooler than normal)How big are the waves at Nine Mile Reef today?
The current surf forecast for Nine Mile Reef at 3PM is: 1.6m 9s primary swell from a South-southwest direction and 0.9m 10s secondary swell from a West-southwest direction, 0.6m 13s secondary swell from a West-southwest direction (forecast issued at 07:00am December 17). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 4ft (1.2m) | 10s |
| Afternoon (17 Dec) | 5ft (1.6m) | 9s |
| Evening (17 Dec) | 5ft (1.6m) | 9s |
Table - waves today at Nine Mile Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 10 | 10 | 9 | 13 | 9 | 9 | 12 | 8 | 9 | 9 | 9 | 10 | 12 | 12 | 9 | 11 | 10 | 11 | 10 | 5 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 275 | 264 | 710 | 400 | 993 | 412 | 348 | 386 | 235 | 151 | 177 | 181 | 377 | 521 | 521 | 138 | 372 | 138 | 334 | 99 | 96 | 390 | 443 | 589 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on |
High Tide / height (m) | 1:41PM 1.32 | 2:15AM 1.28 | 2:18PM 1.36 | 2:50AM 1.33 | 2:53PM 1.39 | |||||||||||||||||||
Low Tide / height (m) | 7:40AM 0.44 | 8:07PM 0.28 | 8:17AM 0.38 | 8:41PM 0.23 | 8:52AM 0.34 | 9:14PM 0.20 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| Sunrise | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:53 | - | - | - | - | - | - | - | 7:53 | - | - | - |
 |  | | | |  | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 17 | 20 | 20 | 19 | 18 | 17 | 16 | 16 | 18 | 22 | 22 | 21 | 20 | 18 | 17 |
| Feels °C (?) | 14 | 14 | 13 | 12 | 11 | 12 | 12 | 13 | 12 | 14 | 15 | 14 | 13 | 13 | 14 | 13 | 13 | 15 | 17 | 16 | 15 | 15 | 14 | 14 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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