Surf Forecasts:
Nine Mile Reef surf forecast from 2 Sep 2026:
- Best quality surf: Saturday 5 Sep, 2AM (local time) - 7.5ft (2.3m), 8s period, SE swell with cross-shore winds.
- Most powerful swell: Sunday 6 Sep, 11AM (local time) - 5ft (1.5m), 18s period, SSW swell with 1,431 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 11PM (local time) - 5ft (1.6m), 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 Wednesday (Sep 02) at 11PM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 0.7m and 3s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.5m 18s and forecast to arrive on Sunday (Sep 06) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 2nd Sep) | 5ft (1.6m) 13s |
| Best Surf | 2AM (Sat 5th Sep) | 7.5ft (2.3m) 8s |
| Most Powerful | 11AM (Sun 6th Sep) | 5ft (1.5m) 18s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright, let’s talk about Nine Mile Reef in proper measurements for those not on the metric system.
So the water’s hanging around 58°, which is a bit colder than normal for this time of year. You’ll feel it.
The first real highlight is on Sunday, September 6th. We’ve got a clean groundswell from the SSW running with a 18-second period – that’s long-period energy. The combined energy is strong at (2212). The swell is about 5 feet. In the morning there’s a little cross-shore breeze, but by the afternoon it glass right off with the wind dropping to a calm 3 mph from the south. That is prime for this reef, just keep in mind the sets will be a bit more spaced out because of that long period. Crowds are a “sometimes” thing, so expect a few others out.
Next one to look at is Saturday, September 13th. The afternoon is the call here. The swell jumps to 8 feet from the SE, combined energy at (1163). The wind is a light cross-onshore at 9 mph from the SE, which is manageable. It says wind and tide are favorable. That size is starting to push the limits for beginners, but it’s a good, powerful day for the experienced folks riding the reef.
Later in the period, on Wednesday, September 16th, the afternoon gets big. A real solid 10-foot groundswell from the SSW with a 16-second period and a massive combined energy of (4975). That is a lot of water moving around. The wind is onshore at 12 mph. The forecast says wind and tide are favorable, but that size is for experts only. It’s gonna be a big, heavy, messy wave for your average surfer.
When it’s all said and done, the best bet is still that Sunday the 6th. The combination of a quality southwest groundswell and near-perfect glassy conditions is tough to beat.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Very mild (max 17°C on Fri afternoon, min 11°C on Fri night). Winds increasing (calm on Wed night, strong winds from the SE by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Sun afternoon, min 11°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SW 13 | SW 13 | SW 13 | SW 12 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SE 8 | SE 7 | SE 7 | SSW 21 | SSW 18 | SW 16 | SW 15 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SW 11 | SW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1299 | 991 | 466 | 256 | 1039 | 1356 | 1010 | 853 | 606 | 392 | 318 | 777 | 1431 | 748 | 489 | 493 | 421 | 359 | 183 | 76 | 40 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | on | off | cross-off | cross-off | off | cross-off | cross-on | glassy |
High Tide | 6:18PM1.43m | 6:47AM1.21m | 7:09PM1.29m | 7:54AM1.09m | 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 | ||||||||
Low Tide | 11:59AM0.28m | 00:38AM0.30m | 12:45PM0.40m | 1:37AM0.43m | 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 | ||||||||
 | |  | |  | | | | | | | | | | | | | | | | | |
 | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — |
 | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 16 | 16 | 15 | 15 | 17 | 14 | 16 | 21 | 16 | 21 | 24 | 18 | 18 | 21 | 15 | 17 | 20 | 15 |
Feels °C | 14 | 13 | 13 | 13 | 8 | 7 | 6 | 7 | 7 | 11 | 16 | 11 | 20 | 23 | 17 | 14 | 17 | 14 | 15 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | WSW 12 | S 15 | S 14 | SSW 13 | SSW 10 | SSW 10 | SSW 21 | SSW 18 | SW 16 | SW 15 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SW 11 | S 10 |
| kJ | 1299 | 991 | 466 | 256 | 118 | 54 | 4 | 16 | 57 | 108 | 102 | 777 | 1431 | 748 | 489 | 493 | 421 | 359 | 183 | 76 | 29 |
Swell 2 Height (m) Direction Period (s) | — | — | S 10 | — | — | — | — | SSW 14 | S 13 | WSW 10 | WSW 10 | SSW 9 | SE 7 | SE 7 | SSE 6 | SE 6 | SE 12 | SW 18 | SW 16 | S 10 | SW 11 |
| kJ | — | — | 151 | — | — | — | — | 37 | 86 | 10 | 10 | 34 | 112 | 54 | 28 | 10 | 5 | 12 | 41 | 71 | 40 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | S 13 | — | SW 25 | SSW 12 | S 9 | SE 10 | — | SSE 14 | SSE 13 | ESE 12 | — | SW 15 | SW 14 |
| kJ | — | — | — | — | — | — | — | — | 86 | — | 25 | 15 | 6 | 24 | — | 18 | 16 | 88 | — | 35 | 33 |
Wind waves Height (m) Direction Period (s) | — | — | ESE 4 | S 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SE 8 | SE 7 | SE 7 | SE 8 | ESE 8 | SE 8 | — | NNW 3 | WNW 4 | WNW 4 | NW 3 | — | — |
| kJ | — | — | 28 | 160 | 1039 | 1356 | 1010 | 853 | 606 | 392 | 318 | 292 | 663 | 450 | — | 3 | 9 | 13 | 3 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 21 | 0 | 16 | 888 | 198 | 1473 | 3857 | 27 | 27 | 27 | 16 | 12 | 16 | 0 | 18 | 18 | 0 | 0 | 10 | 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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