
Surf Forecasts:
Nine Mile Reef surf forecast from 6 Sep 2026:
- Best quality surf: Thursday 10 Sep, 11AM (local time) - 7ft (2.1m), 16s period, SW swell with onshore winds.
- Most powerful swell: Thursday 10 Sep, 11AM (local time) - 7ft (2.1m), 16s period, SW swell with 2,201 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 4.5ft (1.3m), 15s period with SSW 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 Monday (Sep 07) at 2AM. The primary swell is predicted to be 1.3m and 15s period with a secondary swell of 0.7m and 6s. Another secondary swell of 1.7m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nine Mile Reef in the next 16 days are 2.1m 16s and forecast to arrive on Thursday (Sep 10) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Sunday (Sep 13) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 4.5ft (1.3m) 15s |
| Best Surf | 11AM (Thu 10th Sep) | 7ft (2.1m) 16s |
| Most Powerful | 11AM (Thu 10th Sep) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what Nine Mile Reef has cookin’ for us over the next couple of weeks.
Straight up, this isn’t a run of endless glory. There are a few windows where it cleans up and the swell lines up, but you’ve gotta pick your moments. The water’s sittin’ at 57°, which is a bit colder than normal for this time of year, so don’t forget the rubber.
We kick off on Sunday the 6th of September with a solid 5ft SSW swell, period of 16 seconds – that’s proper groundswell energy, 1098 (moderate to strong energy) – but the wind’s cross-on from the ESE at 6 mph and it’s only a marginal call. Not the one to get excited about.
Monday the 7th, though – that’s where it gets interesting. The morning is glassy, wind from the NW at just 3 mph, and you’ve got a clean 4ft SSW swell, 14-second period, energy at 679. This is a standout window: clean, light, and that longer period will give the reef some nice shape. It’s a fairly consistent spot but can get a few heads out sometimes, so don’t expect solitude.
Tuesday the 8th morning still has some glassy leftovers – 3ft from the S, 11 seconds, but that’s small and fading. After that, things go quiet and a bit ordinary through Wednesday, with onshore winds and weak little 2ft waves.
Then we get a real spike on Thursday the 10th. Morning sees a big 7ft SW groundswell, 16 seconds, energy roaring at 2201 – that’s strong energy. But here’s the thing: the wind’s onshore from the S at 9 mph, and the swell might be too big for this break, especially for beginners. That one’s for experienced crew only, and even then, conditions aren’t ideal.
Friday the 11th and Saturday the 12th are messy with strong cross-on winds and lumpy conditions. Not worth paddling out unless you’re after a wrestle.
Sunday the 13th brings offshore winds from the NNW, but the swell drops to 4ft and it’s still a bit marginal. The morning’s your best bet if you’re keen, with 19 mph offshore winds keeping things clean but fresh.
Monday the 14th morning has gentler offshore breezes and 3ft of SW swell – small but clean.
Now, Tuesday the 15th is another one to watch. You’ve got 6ft SW swell, 13 seconds, and clean cross-off winds from the NNW. Energy is nearly 1000. That’s a solid, surfable day with good shape.
Wednesday the 16th turns ugly again with strong onshore winds and a short-period 10ft SSE slop on the afternoon – that’s only 8 seconds and messy. Not for the paddle crew; looks more like a kite day.
Thursday the 17th is more of the same – strong cross-on winds and lumpy, short-period junk.
Then we finish the run on a high note. Friday the 18th morning has offshore light breezes and 5ft from the SSE, but the period’s only 7 seconds, so it’s a bit weak. Saturday the 19th is the real gem of the second week: glassy conditions in the morning, 4ft SW swell with a long 16-second period, and energy at 677. That’s clean, lined-up, and beautiful. Sunday the 20th morning still has offshore winds and 4ft of SW swell.
Best on offer? Monday the 7th morning and Saturday the 19th morning. The 7th has glassy conditions and solid groundswell; the 19th is glassy with longer-period energy. Both are clean and offer proper reef waves.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 15°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Thu afternoon, min 13°C on Fri night). Mainly fresh winds. | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
PM | 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) | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | SW 11 | SW 14 | SW 13 | SW 13 | SW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SE 7 | SW 13 | SSW 16 | SSW 14 |
Wave Graph | ||||||||||||||||||||
969 | 656 | 662 | 653 | 387 | 144 | 96 | 74 | 109 | 108 | 330 | 2201 | 1344 | 801 | 473 | 324 | 351 | 336 | 1289 | 947 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | glassy | on | glassy | glassy | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | off |
High Tide | 00:04AM1.21m | 12:47PM1.28m | 1:06AM1.34m | 1:36PM1.44m | 1:53AM1.45m | 2:16PM1.58m | 2:33AM1.53m | 2:52PM1.67m | 3:10AM1.57m | 3:26PM1.71m | 3:44AM1.57m | 3:58PM1.70m | 4:16AM1.53m | |||||||
Low Tide | 5:55PM0.51m | 6:33AM0.36m | 7:03PM0.36m | 7:24AM0.23m | 7:51PM0.21m | 8:05AM0.12m | 8:32PM0.09m | 8:42AM0.05m | 9:09PM0.02m | 9:16AM0.02m | 9:43PM-0.01m | 9:48AM0.03m | 10:15PM0.02m | |||||||
— | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | |
6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:32 | — | — | 6:32 | — | — | 6:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 25 | 22 | 24 | 27 | 21 | 23 | 25 | 19 | 18 | 17 | 15 | 18 | 19 | 15 | 15 | 14 | 14 | 17 | 21 | 18 |
Feels °C | 23 | 20 | 24 | 26 | 20 | 23 | 25 | 18 | 16 | 13 | 13 | 16 | 15 | 11 | 10 | 8 | 10 | 14 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 13 | SSW 16 | SSW 14 |
969 | 656 | 662 | 653 | 387 | 144 | 96 | 40 | 109 | 108 | 330 | 2201 | 1344 | 801 | 473 | 324 | 336 | 336 | 1289 | 947 | |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SE 6 | SE 6 | SE 9 | SW 18 | SW 12 | S 10 | SW 14 | SSE 9 | SSW 8 | SW 21 | — | — | — | — | SSW 16 | WSW 12 | S 8 | — | SSE 8 |
63 | 41 | 9 | 118 | 12 | 112 | 70 | 74 | 15 | 6 | 151 | — | — | — | — | 25 | 274 | 52 | — | 133 | |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 9 | — | SE 10 | SW 16 | SW 16 | SSE 9 | SSW 8 | SSE 8 | SSE 9 | — | — | — | — | — | — | SSW 17 | — | — |
— | — | 8 | — | 74 | 10 | 38 | 16 | 7 | 7 | 8 | — | — | — | — | — | — | 243 | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | ESE 7 | — | — | — | — | — | SSE 2 | S 3 | SSE 3 | SSE 4 | — | S 5 | SSE 6 | SE 6 | SE 6 | SE 7 | SE 7 | SSE 8 | — |
66 | 278 | — | — | — | — | — | 1 | 2 | 3 | 18 | — | 85 | 369 | 228 | 248 | 351 | 231 | 220 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 0 | 0 | 16 | 0 | 0 | 22 | 10 | 26 | 33 | 16 | 16 | 380 | 318 | 165 | 1257 | 27 | 16 | 21 | 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.










