
Surf Forecasts:
Nine Mile Reef surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 11PM (local time) - 5ft (1.6m), 15s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 16 Sep, 5AM (local time) - 6ft (1.8m), 14s period, SW swell with 1,271 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 5AM (local time) - 3ft (0.9m), 13s 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 14) at 5AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.5m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.8m 14s and forecast to arrive on Wednesday (Sep 16) 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 1.5m 5s period and expected on Tuesday (Sep 15) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 14th Sep) | 3ft (0.9m) 13s |
| Best Surf | 11PM (Tue 15th Sep) | 5ft (1.6m) 15s |
| Most Powerful | 5AM (Wed 16th Sep) | 6ft (1.8m) 14s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the menu for Nine Mile Reef over the next couple of weeks. It’s a bit of a mixed bag, so let’s get straight into it.
We’re starting off on Monday the 14th with some small, clean surf. A 3ft SSW swell at 12 seconds, combined with a fresh offshore northerly, will make for some tidy lines. Wave energy is moderate at 231, so it's not a powerhouse, but the conditions will be clean for a beginner-friendly reef. The water temp is about average for this time of year.
Monday afternoon sees the swell drop a touch to 2ft, but still clean with that offshore NNW breeze. Tuesday the 15th brings a bit more size by the afternoon, with 3ft from the SW, but the wind swings cross-offshore, which takes the edge off. By Wednesday the 16th, the swell builds to 4ft in the morning and 5ft in the afternoon, but the wind turns cross-onshore, making for choppy, lumpy conditions. That combined energy jumps up to 1537 by the afternoon, indicating moderate to strong wave energy, but the wind kills it.
Thursday and Friday are much the same story: plenty of swell, but with fresh cross-onshore winds and messy conditions. Saturday the 19th offers a glimmer of hope with lighter winds and a 3ft to 4ft SW swell, but the cross-onshore component and marginal tide conditions mean it’s only a ‘maybe’. That carries on through Sunday and into the next week.
Now, the first real standout comes on Friday the 25th. We’ve got a solid 7ft southerly swell rolling in, with a period of 9 seconds. The wind is offshore from the north, and the conditions are described as wind and tide favorable. However, that swell is pushing 7ft, which is getting big for this reef and more suited to experienced surfers. The energy is strong at 1188. The morning window is the pick.
Saturday the 26th morning is the absolute highlight of the outlook. A 7ft SSW swell with a very long 16-second period, combined with a moderate offshore northerly, means excellent, clean conditions for experienced surfers. The combined energy is a hefty 2203, showing very strong wave power. This is a groundswell, and on a reef like Nine Mile, it’ll set up some nice, powerful lines. The period is long, so expect longer lulls between sets, making paddling out easier. This is the one to circle.
Saturday afternoon gets messy again as the wind swings onshore, and Sunday the 27th is a write-off with 8ft SSW swell and strong cross-onshore winds. The start of the following week, Monday the 28th, still has that 8ft swell, but the wind is light and cross-onshore, and it’s flagged as too big for this break.
Finally, we get a little gem on Tuesday the 29th. A 5ft SSW swell with glassy conditions. That’s a clean, fun-sized wave for the reef, with moderate energy at 749. It’s the kind of session you hope for.
So, to sum it up: don't hold your breath for the first ten days. The best bet is the Saturday the 26th morning for the big, clean groundswell, and the Tuesday the 29th for a glassy, manageable session. The rest is mostly a battle with onshore winds.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Tue night. Very mild (max 18°C on Mon afternoon, min 12°C on Tue night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Sat afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the SE on Thu afternoon, light winds from the ESE by Sat morning). | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 13 | SSW 12 | SW 12 | SSW 12 | SW 18 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SW 13 | SW 12 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||
295 | 190 | 142 | 88 | 79 | 367 | 1092 | 526 | 744 | 473 | 455 | 343 | 246 | 209 | 532 | 431 | 301 | 440 | 352 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 4:47AM1.46m | 4:59PM1.54m | 5:17AM1.37m | 5:28PM1.42m | 5:48AM1.26m | 5:59PM1.28m | 6:21AM1.14m | 6:33PM1.14m | 7:05AM1.02m | 7:25PM1.02m | 8:41AM0.92m | 9:33PM0.94m | |||||||
Low Tide | 10:45PM0.08m | 10:48AM0.16m | 11:14PM0.17m | 11:17AM0.27m | 11:43PM0.29m | 11:46AM0.39m | 00:13AM0.41m | 12:17PM0.51m | 00:51AM0.54m | 12:59PM0.64m | 1:58AM0.65m | 2:48PM0.74m | 4:47AM0.67m | ||||||
— | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | |
6:35 | — | 6:35 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:38 | — | |
mm | 2 | 1 | — | — | 1 | — | 17 | 3 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 18 | 16 | 17 | 18 | 15 | 13 | 15 | 13 | 16 | 17 | 14 | 16 | 19 | 15 | 18 | 22 | 18 |
Feels °C | 15 | 12 | 12 | 12 | 10 | 10 | 8 | 7 | 8 | 5 | 8 | 9 | 8 | 8 | 11 | 9 | 15 | 20 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 12 | SW 12 | SSW 12 | SSW 11 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SW 13 | SW 12 | SW 14 | SW 13 |
295 | 190 | 142 | 88 | 79 | 367 | 1092 | 526 | 553 | 473 | 455 | 343 | 246 | 209 | 532 | 431 | 301 | 440 | 352 | |
Swell 2 Height (m) Direction Period (s) | SSE 7 | SE 13 | SE 13 | WNW 8 | SW 18 | WSW 8 | SE 14 | S 7 | SW 13 | W 12 | W 12 | — | SSW 6 | SSW 15 | — | SW 16 | SSW 15 | — | — |
42 | 41 | 25 | 6 | 78 | 6 | 7 | 68 | 744 | 453 | 144 | — | 43 | 144 | — | 66 | 144 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 13 | SE 13 | SE 13 | — | SW 9 | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 7 | 7 | 7 | — | 77 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 3 | NW 3 | NW 5 | NNW 4 | NW 5 | NW 5 | NNW 4 | ESE 3 | SSE 7 | SE 6 | SE 5 | SSE 6 | SE 5 | SE 6 | SE 6 | SE 6 | SE 5 | SE 6 | SE 5 |
1 | 5 | 60 | 28 | 70 | 106 | 15 | 1 | 240 | 133 | 92 | 168 | 60 | 110 | 178 | 97 | 84 | 160 | 51 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 43 | 151 | 52 | 160 | 206 | 26 | 21 | 198 | 21 | 166 | 198 | 198 | 43 | 165 | 16 | 16 | 27 | 16 |
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.










