
Surf Forecasts:
Nine Mile Reef surf forecast from 4 Sep 2026:
- Best quality surf: Saturday 5 Sep, 5AM (local time) - 7ft (2.1m), 7s period, SE swell with cross-shore winds.
- Most powerful swell: Sunday 6 Sep, 8AM (local time) - 5.5ft (1.7m), 19s period, SSW swell with 2,121 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 5AM (local time) - 7ft (2.1m), 7s period with SE 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 Saturday (Sep 05) at 5AM. The primary swell is predicted to be 2.1m and 7s period with a secondary swell of 0.4m and 13s. Another secondary swell of 0.3m and 10s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.7m 19s and forecast to arrive on Sunday (Sep 06) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 5th Sep) | 7ft (2.1m) 7s |
| Best Surf | 5AM (Sat 5th Sep) | 7ft (2.1m) 7s |
| Most Powerful | 8AM (Sun 6th Sep) | 5.5ft (1.7m) 19s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at what we’ve got on the menu for Nine Mile Reef over the next couple of weeks. Gotta be straight with you: it’s a rough start. The first several days are a write-off.
Imperial
Right off the bat, Friday the 4th and Saturday the 5th are a no-go. We’re looking at a strong cross-onshore wind and lumpy, messy surf. The swell is there – 8ft to 10ft from the SSE, period a short 8 to 9 seconds – but it’s just a blown-out, ugly mess. The water sits at 58°, a bit colder than usual for this time of year.
Sunday the 6th is *almost* there. Swell drops to 6ft, but it’s a very long period groundswell of 18 seconds from the SSW. That kind of period means proper energy (combined energy of 2080), but at a reef like this with a cross-onshore breeze, it’s gonna be frustrating. Hard to get into a rhythm.
Now, Monday the 7th is where it gets interesting. The wind goes light and cross-offshore, and we’ve got a clean, 4ft SSW swell. It’s not huge, but the conditions are right for some fun, lined-up waves. The 14-second period will have a bit of punch and those longer lulls. This is a real standout for the near term – a solid, clean option for a beginner-friendly reef.
After that, it gets small. Tuesday the 8th morning is glassy but only 3ft – a little too small for much. The rest of that week stays tiny and mostly blown out by onshore winds.
We hit a dead zone from around Saturday the 12th through to Monday the 14th of September, with strong winds and poor surf, despite some solid 7ft swell. Not worth paddling out.
But then, the long-range window opens up with some real promise. Tuesday the 15th and Wednesday the 16th start to clean up. Wednesday the 16th is a beaut – glassy in the morning (4ft, 12 seconds), then a clean, light cross-offshore breeze in the afternoon with a solid 3ft groundswell. That afternoon session is a sleeper hit.
Then, a big change. On Thursday the 17th of September, the wind goes moderate offshore from the north, and we’re looking at a massive 8ft to 10ft SSW swell. The combined energy is pumping hard at 3565 to 3882. The thing is, for a beginner reef like Nine Mile, that’s just too much. It’s an expert-only affair that day. If you know what you’re doing, it could be a proper, heavy session, but for most of us, that’s a watch-from-the-beach day.
The swell stays big on Friday the 18th, but the wind swings onshore again, ruining it. We end the outlook on Saturday the 19th with a drop back to 6ft, but the wind is back on it.
So, the standout window is Monday the 7th of September for clean, fun waves, and keep an eye on Wednesday the 16th of September for another clean session. The big stuff on the 17th is for experts only.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 10°C on Sat morning). Winds decreasing (strong winds from the SE on Fri afternoon, light winds from the NNE by Sun night). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
AM | 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) | SSE 9 | SSE 8 | SE 7 | SE 7 | SE 7 | SSW 21 | SSW 18 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | SW 11 | SW 14 | SW 13 | SW 13 | SW 17 | SW 15 | SW 14 | SW 14 |
Wave Graph | |||||||||||||||||||||
897 | 980 | 456 | 341 | 379 | 1498 | 1880 | 969 | 711 | 662 | 577 | 452 | 149 | 97 | 56 | 85 | 100 | 342 | 1011 | 998 | 801 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-on | glassy | glassy | on | on | cross-on | on | on | on | on | cross-on |
High Tide | 8:29PM1.16m | 9:45AM1.04m | 10:28PM1.13m | 11:38AM1.12m | 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 | ||||||||
Low Tide | 1:54PM0.54m | 3:13AM0.52m | 3:57PM0.60m | 5:15AM0.49m | 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 | ||||||||
7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | |
— | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 18 | 13 | 16 | 20 | 16 | 20 | 26 | 23 | 24 | 27 | 21 | 21 | 24 | 18 | 19 | 20 | 15 | 16 | 17 | 14 |
Feels °C | 8 | 8 | 6 | 11 | 15 | 11 | 18 | 25 | 22 | 23 | 27 | 22 | 21 | 25 | 17 | 18 | 19 | 14 | 13 | 13 | 10 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 14 | SSW 13 | S 10 | SSW 10 | SSW 21 | SSW 18 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | S 10 | S 9 | SW 13 | SW 13 | SW 17 | SW 15 | SW 14 | SW 14 |
4 | 15 | 56 | 77 | 131 | 1498 | 1880 | 969 | 711 | 662 | 577 | 452 | 149 | 71 | 41 | 85 | 100 | 342 | 1011 | 998 | 801 | |
Swell 2 Height (m) Direction Period (s) | S 15 | SSW 14 | SW 11 | SW 10 | WSW 9 | SW 9 | — | S 12 | SE 7 | SSE 6 | SE 9 | SW 18 | SW 12 | SW 11 | SW 11 | S 9 | S 8 | SW 12 | — | — | — |
4 | 18 | 18 | 15 | 9 | 42 | — | 3 | 52 | 14 | 118 | 13 | 89 | 97 | 56 | 23 | 5 | 116 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | S 13 | SSW 13 | SSW 26 | SSW 13 | — | — | — | SE 9 | SSE 13 | SE 9 | SW 16 | SW 16 | SW 14 | SW 10 | SSE 8 | SSE 8 | — | — | — |
— | — | 86 | 18 | 65 | 16 | — | — | — | 3 | 55 | 71 | 11 | 38 | 54 | 14 | 7 | 7 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 9 | SSE 8 | SE 7 | SE 7 | SE 7 | SE 7 | SE 8 | SE 7 | ESE 7 | — | — | — | — | — | — | — | SSW 3 | S 4 | SSE 3 | S 5 | SSE 6 |
897 | 980 | 456 | 341 | 379 | 355 | 200 | 171 | 316 | — | — | — | — | — | — | — | 1 | 5 | 6 | 97 | 173 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1473 | 198 | 27 | 27 | 27 | 27 | 16 | 16 | 0 | 0 | 10 | 0 | 0 | 22 | 22 | 10 | 22 | 16 | 21 | 256 | 249 |
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.










