Surf Forecasts:
Nine Mile Reef surf forecast from 29 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 5PM (local time) - 7ft (2.1m), 13s period, SSW swell with onshore winds.
- Most powerful swell: Sunday 30 Aug, 2PM (local time) - 8ft (2.5m), 12s period, SW swell with 1,859 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 11AM (local time) - 2.5ft (0.7m), 14s 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 Saturday (Aug 29) at 11AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.7m and 11s. 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 2.5m 12s and forecast to arrive on Sunday (Aug 30) at 2PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sat 29th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 5PM (Tue 1st Sep) | 7ft (2.1m) 13s |
| Most Powerful | 2PM (Sun 30th Aug) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
The Lowdown
Alright, let’s talk surf.
First up, Saturday the 29th morning: 2ft of SW swell with a long 14-second period, combined energy moderate. A light NE cross-off breeze keeps it clean. Water’s a bit colder than usual at 58°F, about 2°F off average. Small, but rideable for beginners. Afternoon goes onshore and messy.
Sunday the 30th and Monday the 31st are junk – onshore winds, poor conditions.
Tuesday the 1st of September is the big one. Morning: 6ft of SSW groundswell, 13-second period, combined energy strong at 1045. Glassy, no wind, perfect. This is excellent for experienced surfers. Afternoon gets too big at 7ft, with onshore wind, so go early.
Wednesday the 2nd morning stays big at 7ft but cross-on, less clean. Rest of the week is blown out by strong winds – Thursday, Friday, skip it.
Saturday the 5th afternoon goes glassy again with 3ft of SSW swell, clean and fun. Sunday the 6th is the second standout: offshore N to NNW winds, 4ft to 3ft of SW swell with a very long 15-second period, combined energy moderate. Clean and very good. Long-period groundswell on the reef – nice.
Monday the 7th and Tuesday the 8th are small and clean but not exciting. From Wednesday the 9th, poor onshore winds and weak swell take over until Saturday the 12th, which offers some clean head-high waves at 4ft, but it’s only marginal.
Sunday the 13th morning: 5ft of SW swell, 13-second period, combined energy strong, with a light offshore NNW wind. Clean and solid. Afternoon gets a little cross-on, but morning is a go.
Best bets: Tuesday 1st September morning and Sunday 6th September. Glassy, clean, and good swell. Don’t miss it.
- Rusty
Short Range ForecastSome drizzle, heaviest during Sat afternoon. Very mild (max 18°C on Sat morning, min 10°C on Sun night). Winds decreasing (fresh winds from the SSW on Sat afternoon, calm by Mon night). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Thu morning. Very mild (max 17°C on Wed afternoon, min 11°C on Tue morning). Winds increasing (calm on Tue morning, strong winds from the SE by Thu night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 14 | SW 14 | SW 8 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SSW 13 | SSW 13 | SW 14 | SSW 14 | SW 13 | SW 13 | SW 12 | SW 12 | S 9 | SSE 11 | SSE 7 | SSW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 186 | 164 | 288 | 742 | 511 | 355 | 380 | 354 | 360 | 1045 | 1543 | 1788 | 1590 | 1006 | 649 | 479 | 355 | 994 | 831 | 403 | 270 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | on | on | on | cross | on | on | cross-on | glassy | on | cross-on | cross-on | on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 4:01PM1.65m | 4:15AM1.52m | 4:31PM1.65m | 4:47AM1.49m | 5:03PM1.61m | 5:22AM1.43m | 5:37PM1.54m | 6:00AM1.33m | 6:18PM1.43m | 6:47AM1.21m | 7:09PM1.29m | 7:54AM1.09m | 8:29PM1.16m | ||||||||
Low Tide | 9:49AM0.06m | 10:14PM0.08m | 10:18AM0.07m | 10:45PM0.08m | 10:48AM0.11m | 11:18PM0.12m | 11:21AM0.18m | 11:55PM0.19m | 11:59AM0.28m | 00:38AM0.30m | 12:45PM0.40m | 1:37AM0.43m | 1:54PM0.54m | 3:13AM0.52m | |||||||
 |  |  |  | | | | | | | |  | |  | | |  | | | | | |
 | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | — | 6:23 | — | — | 6:24 | — | — | 6:25 | — | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 1 | — | — | — | — |
Temp °C | 18 | 15 | 14 | 14 | 14 | 12 | 12 | 13 | 12 | 14 | 16 | 15 | 16 | 17 | 15 | 14 | 15 | 14 | 14 | 18 | 13 |
Feels °C | 16 | 10 | 10 | 9 | 8 | 7 | 8 | 9 | 9 | 13 | 14 | 14 | 14 | 14 | 12 | 12 | 9 | 6 | 4 | 9 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 10 | SW 8 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SSW 13 | SSW 13 | SW 14 | SSW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 15 | SSW 14 | SSW 11 | SSW 11 |
| kJ | 186 | 115 | 288 | 742 | 511 | 355 | 380 | 354 | 360 | 1045 | 1543 | 1788 | 1590 | 1006 | 649 | 479 | 355 | 167 | 204 | 251 | 270 |
Swell 2 Height (m) Direction Period (s) | S 11 | SW 14 | SW 13 | SSE 11 | SSE 10 | S 7 | S 11 | S 10 | SSW 14 | — | — | — | — | — | — | SSW 15 | S 16 | SSW 14 | WSW 11 | S 15 | S 14 |
| kJ | 116 | 164 | 208 | 11 | 20 | 47 | 2 | 2 | 163 | — | — | — | — | — | — | 43 | 126 | 301 | 176 | 110 | 104 |
Swell 3 Height (m) Direction Period (s) | SSE 13 | S 11 | SSE 11 | — | — | SE 10 | — | — | S 10 | — | — | — | — | — | — | SSW 18 | SSW 16 | SW 11 | S 15 | S 15 | S 14 |
| kJ | 68 | 61 | 37 | — | — | 4 | — | — | 2 | — | — | — | — | — | — | 32 | 215 | 43 | 113 | 110 | 153 |
Wind waves Height (m) Direction Period (s) | — | SW 6 | — | — | S 4 | ESE 4 | — | — | — | — | — | — | — | SSE 5 | SSE 5 | S 5 | SSE 4 | S 9 | SSE 11 | SSE 7 | SE 7 |
| kJ | — | 54 | — | — | 39 | 5 | — | — | — | — | — | — | — | 56 | 62 | 57 | 31 | 994 | 831 | 403 | 247 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 22 | 16 | 34 | 318 | 12 | 22 | 22 | 10 | 0 | 10 | 16 | 16 | 380 | 12 | 142 | 380 | 980 | 1214 | 36 | 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.
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