Surf Forecasts:
Nine Mile Reef surf forecast from 26 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 11AM (local time) - 7ft (2.1m), 14s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 1 Sep, 5PM (local time) - 10ft (3.0m), 14s period, SSW swell with 3,313 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 11PM (local time) - 4.5ft (1.3m), 12s period with S 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 (Aug 26) at 11PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.6m and 15s. Another secondary swell of 1.6m and 8s 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 3.0m 14s and forecast to arrive on Tuesday (Sep 01) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Tuesday (Sep 01) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 26th Aug) | 4.5ft (1.3m) 12s |
| Best Surf | 11AM (Tue 1st Sep) | 7ft (2.1m) 14s |
| Most Powerful | 5PM (Tue 1st Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's coming up at Nine Mile Reef.
Look, we've got a bit of a mixed bag on the horizon. The next week or so is pretty lackluster, with small, onshore slop ruling the roost. But hang tight, because the tail end of the period is looking absolutely wild, though it's gonna be a game of nerves for the big wave crew only.
We start off on Wednesday, the 26th of August, with a tiny 2 ft SSW swell coming in with a long 16-second period, but the wind is from the east, putting it cross-shore. The combined energy is weak (717), and the water temp is a normal 59° for the time of year, nothing to write home about. It's a marginal day, not much to get excited about.
Thursday the 27th sees a bit more size, with 5 ft from the S on Thursday morning, period 11 seconds. The wind is from the NNW, giving us a clean, cross-offshore breeze. The energy is moderate (674). It's a clean wave, but nothing special. The afternoon turns onshore and messy.
Friday the 28th is a real tease. The morning starts with a 4 ft S swell and glassy conditions – dead flat wind from the WSW. That’s a beautiful, clean window. The energy is still moderate (347). It’s small, but it will be the best looking wave of this first week. The afternoon turns onshore and goes to crap.
The weekend and start of the following week are a write-off. Onshore winds, chop, and rain. From Saturday the 29th through to Tuesday the 1st of September, the swell is small and the wind is either onshore or cross-on. It's a desert of poor conditions.
Now, here’s where it gets interesting, but you need to be a serious surfer. On Tuesday the 1st of September, the swell jumps to 7 ft from the SW with a 14-second period. The wind is a fresh 22 mph offshore from the NNW. That’s a recipe for a clean, powerful wave. The combined energy is strong (1761). However, the forecast notes the swell is too big for this break. This is a reef, and 8 ft+ is for experts only. It’s a promising but less certain call for the big guys.
That energy keeps building. By Friday the 4th of September, we’re looking at a massive 15 ft groundswell from the SSE, period 10 seconds, with clean offshore winds. The energy is very strong (3997). This is a serious, big-wave event. The following Saturday the 5th sees a 20 ft S swell with a 13-second period and fresh offshore wind. The energy is extreme (11535). This is massive, dangerous, and for experts only. The reef will be a washing machine, but if you're on the right craft and have the balls, it'll be a day to remember.
After that big pulse, it drops back down. Monday the 7th of September morning has a clean 6 ft S swell with a 10-second period, cross-offshore wind, and moderate energy (774). That’s a solid, surfable wave for the average surfer, looking pretty clean. The rest of the week then fades out to small, poor conditions.
So, the standout here is that glassy Friday morning the 28th for the small-wave crew, and the massive, dangerous, clean swell from the 1st to the 6th of September for the big wave specialists. The best all-rounder is that Monday the 7th of September morning session.
Stay safe out there.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 12°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 17°C on Sat afternoon, min 9°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | SSW 16 | SSW 16 | S 12 | S 11 | S 11 | S 11 | S 11 | S 10 | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SSW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
266 | 441 | 464 | 502 | 433 | 403 | 277 | 175 | 138 | 178 | 162 | 299 | 424 | 379 | 400 | 298 | 249 | 220 | 1761 | 3313 | 1945 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-off | cross-on | on | glassy | on | on | cross | on | on | cross-on | cross-on | cross-on | on | on | off | off | cross | cross-on |
High Tide | 2:37PM1.43m | 2:44AM1.43m | 3:05PM1.53m | 3:14AM1.49m | 3:33PM1.60m | 3:44AM1.52m | 4:01PM1.65m | 4:15AM1.52m | 4:31PM1.65m | 4:47AM1.49m | 5:03PM1.61m | 5:22AM1.43m | 5:37PM1.54m | ||||||||
Low Tide | 8:28AM0.22m | 8:47PM0.25m | 8:55AM0.14m | 9:15PM0.17m | 9:22AM0.09m | 9:44PM0.11m | 9:49AM0.06m | 10:14PM0.08m | 10:18AM0.07m | 10:45PM0.08m | 10:48AM0.11m | 11:18PM0.12m | 11:21AM0.18m | 11:55PM0.19m | |||||||
7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:23 | — | — | 6:24 | — | — | 6:25 | — | — | 6:25 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | 1 | — |
Temp °C | 18 | 23 | 22 | 22 | 24 | 16 | 19 | 22 | 15 | 16 | 17 | 14 | 14 | 15 | 13 | 13 | 14 | 12 | 13 | 15 | 14 |
Feels °C | 16 | 22 | 20 | 19 | 21 | 16 | 18 | 21 | 13 | 16 | 16 | 10 | 10 | 9 | 9 | 11 | 10 | 10 | 6 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 12 | S 12 | S 11 | S 11 | S 11 | S 11 | S 10 | S 10 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SSW 14 | SW 13 |
266 | 399 | 464 | 502 | 433 | 403 | 277 | 175 | 100 | 178 | 162 | 299 | 424 | 379 | 400 | 298 | 249 | 220 | 1761 | 3313 | 1945 | |
Swell 2 Height (m) Direction Period (s) | SSW 11 | S 16 | S 15 | WSW 12 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | S 11 | SW 10 | SSW 6 | SSE 11 | SSE 10 | SSE 6 | SSE 6 | SE 6 | S 10 | — | — | — |
128 | 318 | 157 | 54 | 11 | 35 | 47 | 155 | 138 | 116 | 74 | 66 | 22 | 20 | 4 | 4 | 1 | 2 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SSW 16 | WSW 12 | SE 8 | WSW 11 | WSW 15 | WSW 11 | SSE 14 | S 13 | SSE 13 | S 11 | WSW 8 | — | — | SE 10 | S 10 | S 10 | SW 13 | — | — | — |
124 | 441 | 210 | 118 | 183 | 126 | 23 | 62 | 82 | 99 | 86 | 59 | — | — | 4 | 2 | 2 | 162 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | — | WNW 3 | W 3 | — | — | — | — | — | — | — | S 6 | SSE 4 | SE 6 | — | — | WNW 2 | NNW 4 | NW 5 | — |
199 | 140 | — | 3 | 1 | — | — | — | — | — | — | — | 26 | 40 | 62 | — | — | 1 | 18 | 47 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 16 | 0 | 0 | 10 | 22 | 0 | 22 | 10 | 10 | 22 | 318 | 34 | 56 | 16 | 29 | 19 | 0 | 318 | 165 | 18 |
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.











