
Surf Forecasts:
Nine Mile Reef surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 5AM (local time) - 4.5ft (1.3m), 14s period, SSW swell with cross-offshore 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★+): Monday 7 Sep, 5AM (local time) - 4.5ft (1.3m), 14s 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 5AM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 0.6m and 7s. 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 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 (Mon 7th Sep) | 4.5ft (1.3m) 14s |
| Best Surf | 5AM (Mon 7th Sep) | 4.5ft (1.3m) 14s |
| 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
G’day, Rusty here.
Right off the bat, the next week and a half is looking pretty grim for Nine Mile Reef. We’ve got a lot of cross-onshore junk and lumpy conditions, which is a recipe for frustration. The swell energy is mostly moderate, but it’s just not lining up with clean winds. There’s a bit of a window early on Monday the 7th when the wind swings light offshore and the clean lines start to show, but it’s a tease as it gets chopped up again by the afternoon. The water’s sitting at 58°, which is a touch colder than normal for this time of year—you’ll want the hood.
The surf comes and goes over this stretch. Saturday the 5th is poor, with a weak 6ft SE swell at 7 seconds and moderate energy (407). Sunday the 6th sees a bigger groundswell from the SSW at 18 seconds with strong energy (1906), but it’s still cross-shore and messy. Monday the 7th morning cleanup is the best on offer early: 4ft SSW swell at 14 seconds, light offshore, clean conditions. It’s a small window, not a standout, but it’s the only proper surf to start with.
From Tuesday the 8th through Thursday the 10th, we drop right off. Swell fades to under 3ft, and onshore winds ruin it. There’s a brief pulse on Thursday the 10th morning, 6ft SW at 16 seconds with strong energy (1771), but the southerly wind is straight onshore, so it’s a no-go. Friday the 11th is another write-off with fresh cross-onshore and lumpy waves.
Saturday the 12th is poor again, and then things start to clean up on Sunday the 13th morning. The wind goes offshore from the NNW, and we get a 4ft SSW swell at 14 seconds—clean, moderate energy (755). That’s a decent look for a reef, though the swell’s a bit small. Monday the 14th is also clean with light cross-offshore wind and a smaller 3ft swell. These are okay, but not firing.
The best of the run looks like Sunday the 20th. The swell pushes up to a powerful 12ft from the SW at 14 seconds, with very strong energy (7643). That’s a big, solid groundswell. But here’s the catch—the wind is onshore and it’s raining, so the surface will be chopped up. At 12ft, this is only for the experienced crew. It’s a true standout in size and power, but you’ll be battling the wind and rain. The Saturday before, the 19th, is small and clean but not worth the paddle.
For the second week, from the 15th onward, things are more promising but less certain. Tuesday the 15th morning has strong offshore wind at 28 mph—clean but a real fight to paddle out. The 17th Thursday has a 7ft SSE swell at 9 seconds, but it’s predicted to be too big for this break. Then Friday the 18th morning brings 5ft SW at 11 seconds with clean offshore winds—that looks like the pick of the second week, a solid, reliable session. After that, it fades.
Overall, the standout window is Sunday the 20th for sheer size and power (12ft SW, 14s), but only if you’re an expert and don’t mind the chop. For clean waves, your best bet is Saturday the 13th morning or maybe Friday the 18th morning—moderate size, clean conditions, and a bit more user-friendly.
Nothing’s perfect, but there’s enough to keep you honest.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 10°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Tue afternoon, min 14°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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) | SE 7 | SE 7 | SSW 21 | SSW 18 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | SW 11 | SW 15 | SW 13 | SW 13 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SSW 15 |
Wave Graph | |||||||||||||||||||||
284 | 344 | 1498 | 1702 | 969 | 656 | 662 | 569 | 387 | 146 | 96 | 75 | 109 | 106 | 326 | 1761 | 1011 | 725 | 466 | 326 | 275 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross | cross-off | on | glassy | glassy | on | on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 3:26PM1.71m | 3:44AM1.57m | |||||||
Low Tide | 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 | 9:16AM0.02m | 9:43PM-0.01m | ||||||||
6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | |
— | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:32 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 20 | 15 | 19 | 25 | 21 | 24 | 27 | 22 | 23 | 28 | 18 | 17 | 18 | 16 | 18 | 19 | 16 | 15 | 15 | 13 |
Feels °C | 9 | 16 | 10 | 17 | 23 | 19 | 23 | 26 | 22 | 24 | 28 | 18 | 15 | 15 | 13 | 16 | 16 | 12 | 10 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 21 | SSW 18 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | S 11 | S 10 | SW 11 | SW 13 | SW 13 | SW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 11 |
108 | 128 | 1498 | 1702 | 969 | 656 | 662 | 569 | 387 | 146 | 70 | 40 | 109 | 106 | 300 | 1761 | 1011 | 725 | 466 | 324 | 213 | |
Swell 2 Height (m) Direction Period (s) | SW 10 | SSW 26 | SSW 10 | SW 9 | S 12 | SE 7 | SE 6 | SE 9 | SW 18 | SW 12 | SW 11 | SSE 9 | SSE 8 | SSE 8 | SW 16 | — | — | — | SSW 8 | SSW 12 | SSW 15 |
15 | 65 | 85 | 20 | 3 | 54 | 9 | 120 | 12 | 89 | 96 | 32 | 24 | 7 | 326 | — | — | — | 35 | 207 | 272 | |
Swell 3 Height (m) Direction Period (s) | — | WSW 10 | SSW 12 | — | — | — | ESE 9 | — | ESE 10 | SW 16 | SW 16 | SW 15 | W 11 | S 8 | SW 4 | — | — | — | — | — | SSW 11 |
— | 9 | 15 | — | — | — | 9 | — | 61 | 10 | 38 | 75 | 9 | 4 | 3 | — | — | — | — | — | 135 | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | SE 6 | SE 7 | SE 7 | ESE 7 | — | — | — | — | — | — | S 3 | S 3 | SSE 4 | ESE 4 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 6 |
284 | 344 | 239 | 184 | 171 | 316 | — | — | — | — | — | — | 3 | 6 | 31 | 10 | 255 | 325 | 357 | 326 | 275 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 31 | 27 | 12 | 16 | 12 | 0 | 10 | 0 | 0 | 22 | 10 | 26 | 256 | 16 | 16 | 380 | 36 | 165 | 358 | 36 |
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.










