Surf Forecasts:
Nine Mile Reef surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 2AM (local time) - 7ft (2.2m), 13s period, SW swell with onshore winds.
- Most powerful swell: Sunday 9 Aug, 5AM (local time) - 11ft (3.5m), 13s period, SW swell with 3,765 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 2AM (local time) - 7ft (2.2m), 13s period with SW swell.
Best Forecast Surf Conditions for Nine Mile Reef this week:
The surf forecast for Nine Mile Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 09) at 2AM. The primary swell is predicted to be 2.2m and 13s period. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Nine Mile Reef in the next 16 days are 3.5m 13s and forecast to arrive on Sunday (Aug 09) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 9th Aug) | 7ft (2.2m) 13s |
| Best Surf | 2AM (Sun 9th Aug) | 7ft (2.2m) 13s |
| Most Powerful | 5AM (Sun 9th Aug) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about Nine Mile Reef in the old measurements.
We’ve got a rough start. Sunday through Monday (August 9-10) are a total bust—strong cross-onshore winds, lumpy water, and poor surf. Don’t bother paddling out. That’s about two days of nothing.
Then things start cleaning up. Tuesday morning (August 11) shows a glimmer with a clean cross-shore breeze and a solid 6ft swell from the south, period around 12 seconds. The combined swell energy is 1432, moderate, but the wind is light. It’s still marginal, but rideable.
Now, here’s the real standout. Wednesday, August 12 is the day. The morning is glassy—dead calm, 5 km/h from the northeast—with a 4ft SW swell and a very long period of 19 seconds. That’s groundswell, and the energy is pumping at 1504. This reef will be firing with clean, powerful lines. Water temp is about average for the season. This is for experienced surfers only; that long period means the sets are spaced out, but the shape will be perfect. Crowds are possible here, so expect some company. The afternoon stays glassy, too, with a slight drop to about 4ft.
Thursday (August 13) stays clean with cross-offshore winds from the NNE and 5ft SW swell, period still long at 18 seconds. Good waves, but not as pristine as Wednesday.
Friday and Saturday (August 14-15) drop off to around 3ft, with light winds and clean conditions but weak energy—around 296 to 370. Fine for a longboard or a beginner, but nothing to get stoked about.
The following week has a couple more gems. Monday, August 17 morning is glassy again with 6ft SW swell, period 16 seconds, and energy at 1449. Another excellent window for experienced surfers. Then, Wednesday, August 19 brings clean cross-offshore winds and a punchy 6ft SW swell, period 10 seconds. Shorter period but still fun, with combined energy at705.
The real standout in the second week, though, is Saturday, August22. Moderate offshore winds from the NNW, 6ft SW swell, long period of 16 seconds, and a combined energy of1712—that’s strong. Clean, powerful, and for experts only. Circle that date.
Overall, there’s a gap at the start, but once the wind cleans up, Nine Mile Reef serves up a few proper sessions. The best days are August12, August17, and August22.
Stay salty,
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Sun morning. Very mild (max 17°C on Tue afternoon, min 10°C on Mon night). Winds decreasing (fresh winds from the SSE on Sun afternoon, light winds from the ESE by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 15°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 13 | SW 12 | SSW 12 | SSW 11 | S 10 | SSW 10 | S 13 | S 12 | SSW 11 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 1659 | 724 | 1835 | 1072 | 800 | 551 | 1708 | 918 | 331 | 770 | 984 | 985 | 931 | 1482 | 1158 | 619 | 355 | 350 | 308 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-off | glassy | glassy | cross-off | cross-off | cross-off | cross-off | off | cross-off | off |
High Tide | 11:55PM1.26m | 12:49PM1.23m | 1:06AM1.36m | 1:46PM1.38m | 2:01AM1.47m | 2:32PM1.53m | 2:47AM1.55m | 3:14PM1.64m | 3:29AM1.58m | 3:53PM1.70m | 4:08AM1.57m | 4:29PM1.70m | 4:45AM1.52m | ||||||
Low Tide | 6:34AM0.34m | 6:58PM0.40m | 7:33AM0.22m | 7:56PM0.26m | 8:21AM0.11m | 8:45PM0.14m | 9:02AM0.03m | 9:28PM0.06m | 9:40AM-0.01m | 10:08PM0.02m | 10:16AM-0.00m | 10:46PM0.04m | |||||||
 |  | |  |  |  |  | | | | | | | | | | | | | |
 | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — |
 | 6:09 | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — |
mm | 1 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 12 | 17 | 16 | 20 | 23 | 24 | 24 | 26 | 25 | 26 | 27 | 23 |
Feels °C | 11 | 6 | 4 | 5 | 6 | 6 | 5 | 9 | 15 | 13 | 18 | 21 | 20 | 20 | 22 | 22 | 22 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | — | SSW 11 | S 18 | SSW 10 | S 13 | S 12 | SSW 11 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 |
| kJ | 1659 | 724 | — | 1072 | 6 | 551 | 1708 | 918 | 331 | 770 | 984 | 985 | 931 | 1482 | 1158 | 619 | 355 | 350 | 308 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | WSW 11 | SSW 14 | WSW 11 | SW 26 | SW 24 | SE 8 | SE 6 | SE 8 | SW 21 | SE 11 | ESE 9 | SE 8 | ESE 9 | SE 11 | SE 11 |
| kJ | — | — | — | — | 302 | 313 | 101 | 27 | 148 | 112 | 31 | 33 | 664 | 29 | 110 | 14 | 15 | 18 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 18 | WSW 11 | — | W 16 | WSW 10 | SSW 11 | SSW 10 | SW 10 | S 10 | S 10 | — | — | — | — | — |
| kJ | — | — | — | — | 7 | 311 | — | 5 | 20 | 170 | 82 | 26 | 8 | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 7 | SSW 12 | — | S 10 | SE 5 | SE 7 | SE 7 | SE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | — | — | — | — | — | E 3 |
| kJ | — | 357 | 1835 | — | 800 | 126 | 344 | 487 | 163 | 541 | 407 | 238 | 38 | — | — | — | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 318 | 1401 | 36 | 198 | 21 | 16 | 12 | 16 | 0 | 0 | 0 | 0 | 12 | 12 | 0 | 0 | 12 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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Information about the Nine Mile Reef Surf forecast
The above surf forecast table for Nine Mile Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nine Mile Reef can be found by selecting the local surf guide option on the grey menu. Our Nine Mile Reef surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Nine Mile Reef) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Nine Mile Reef may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Nine Mile Reef is 19 km (12 miles) from the very large city of Bellville. If you plan a holiday in Cape Town, look for hotels and other accommodation in Bellville. Bellville has rooms for a wide range of budgets as well as cheap car hire and transport links.
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