
Surf Forecasts:
Nine Mile Reef surf forecast from 12 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 11PM (local time) - 7ft (2.1m), 14s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 15 Jul, 11PM (local time) - 7ft (2.1m), 14s period, SW swell with 1,704 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 2AM (local time) - 3.5ft (1.1m), 10s 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 Monday (Jul 13) at 2AM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.2m and 10s. Another secondary swell of 1.2m and 7s 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 2.1m 14s and forecast to arrive on Wednesday (Jul 15) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Jul 15) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 13th Jul) | 3.5ft (1.1m) 10s |
| Best Surf | 11PM (Wed 15th Jul) | 7ft (2.1m) 14s |
| Most Powerful | 11PM (Wed 15th Jul) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.
Alright, let’s talk about Nine Mile Reef. This is a reef break, open to the swell, and it breaks pretty consistently. Water temp is about 59°F, which is just a hair under average for this time of year—nothing crazy.
The run starts Sunday afternoon, 12 July. We’ve got a 4ft swell from the south, period of 10 seconds, and glassy conditions. The combined energy is moderate at 622. It’s clean and fun-sized for a beginner reef.
Monday, 13 July, drops off hard. Swell down to 2ft and 2ft, periods 9-10 seconds, weak energy (147-139). Surfable but ordinary. Tuesday is even smaller—2ft and 1ft with no energy. A couple of flat days.
Wednesday morning, 15 July, brings a spike: 3ft from the SW, but the period is 17 seconds—that’s a long-period groundswell. Energy is moderate at 526, and it’s clean with a light cross-off breeze. That’ll draw some nice lines on the reef. The afternoon, though, gets 6ft with onshore wind and energy at 1583—marginal.
Thursday morning, 16 July, is a standout. 5ft from the SW, 13-second period, clean cross-off wind, moderate energy at 933. Very good. The afternoon gets a bit crossed up, but still okay.
Friday, 17 July, is ruined by onshore chop from the SE. 5ft swell, but the wind kills it. Skip it.
Saturday, 18 July, bounces back: glassy, 3ft from the SW, 14-second period, moderate energy at 579. Clean and fun. Sunday, 19 July, keeps it clean with offshore wind, 3ft, 12-second period. Good for a longboard.
Monday, 20 July, starts glassy with 3ft, 13-second swell, but fades to ordinary in the afternoon.
Then the big one. Tuesday, 21 July. Morning: 5ft SSW swell, 16-second period—very long groundswell. Offshore wind, clean. Energy is strong at 1563. Excellent for experienced surfers. Afternoon: 6ft, same direction, 16-second period, cross-off wind, energy at 1814. That’s the best session. It’s a bit big for beginners—over 5ft—so only for the crew who know the reef.
Wednesday, 22 July, morning has 7ft from the SSW, glassy, but the file says it’s too big for this break. Afternoon is onshore and messy. Thursday, 23 July, is worse: 7ft in the morning, glassy but too big, then 15ft in the afternoon with onshore wind. Energy is 9840—very strong. That’s kite territory, not paddle.
Friday, 24 July, through Sunday, 27 July, is all oversized. Waves from 8ft to 12ft, periods 13-16 seconds, energy in the thousands. Too big for Nine Mile Reef. The file keeps saying it’s too big. Hard pass.
Finally, Monday, 27 July, things calm down. Morning is 4ft from the SW, 14-second period, offshore wind, moderate energy at 807. Very good. The afternoon is clean and rideable.
The standout is Tuesday, 21 July—both sessions. Long-period groundswell, clean wind, strong energy. Second best is Saturday, 18 July, and Sunday, 19 July, for easy, clean waves. After 22 July, it’s all too big.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun afternoon, min 13°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sun 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | S 10 | S 10 | SSW 10 | SSW 9 | S 10 | S 9 | SSE 9 | SW 12 | SW 17 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SW 14 | SW 13 | SW 13 | SW 12 |
Wave Graph | |||||||||||||||||||||
358 | 237 | 77 | 78 | 47 | 43 | 26 | 23 | 410 | 1581 | 1459 | 933 | 669 | 782 | 499 | 476 | 342 | 363 | 336 | 330 | 236 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | glassy | off | off | cross-off | off | cross-off | on | glassy | cross-off | cross | on | cross-on | cross-on | cross | glassy | glassy | off | off |
High Tide | 2:02AM1.51m | 2:40PM1.48m | 2:54AM1.56m | 3:27PM1.57m | 3:42AM1.58m | 4:12PM1.63m | 4:28AM1.56m | 4:55PM1.64m | 5:11AM1.49m | 5:37PM1.61m | 5:53AM1.40m | 6:18PM1.54m | 6:36AM1.29m | ||||||||
Low Tide | 7:54PM0.27m | 8:28AM0.09m | 8:48PM0.17m | 9:15AM0.03m | 9:38PM0.11m | 9:59AM0.00m | 10:25PM0.08m | 10:41AM0.02m | 11:11PM0.10m | 11:21AM0.07m | 11:55PM0.16m | 12:00PM0.16m | 00:39AM0.25m | 12:39PM0.27m | |||||||
— | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:47 | — | — | 7:47 | |
5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | 5:55 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 16 | 18 | 16 | 15 | 17 | 15 | 15 | 17 | 15 | 15 | 18 | 17 | 14 | 15 | 14 | 17 | 21 | 20 | 18 |
Feels °C | 17 | 16 | 15 | 16 | 16 | 13 | 15 | 14 | 14 | 16 | 15 | 14 | 17 | 17 | 11 | 12 | 13 | 17 | 20 | 20 | 14 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SSW 10 | SSW 9 | S 10 | S 9 | SSE 9 | SSE 8 | SW 17 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SW 14 | SW 13 | SW 13 | SW 12 |
358 | 237 | 77 | 78 | 47 | 43 | 26 | 14 | 410 | 1581 | 1459 | 933 | 669 | 782 | 499 | 476 | 342 | 363 | 336 | 330 | 236 | |
Swell 2 Height (m) Direction Period (s) | WSW 11 | WSW 10 | SSE 9 | S 9 | SSW 9 | WSW 11 | WSW 10 | WSW 9 | SW 11 | SE 8 | — | — | — | — | — | S 19 | S 13 | S 10 | S 11 | S 10 | S 10 |
11 | 10 | 61 | 61 | 34 | 22 | 19 | 16 | 116 | 2 | — | — | — | — | — | 7 | 51 | 216 | 188 | 135 | 80 | |
Swell 3 Height (m) Direction Period (s) | SW 15 | SW 15 | WSW 10 | W 9 | WSW 12 | SSW 9 | SW 12 | SW 12 | W 9 | — | — | — | — | — | — | — | SSW 16 | W 11 | WSW 9 | S 11 | SSE 10 |
35 | 8 | 9 | 6 | 28 | 15 | 23 | 23 | 14 | — | — | — | — | — | — | — | 25 | 112 | 8 | 146 | 108 | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | — | — | — | — | WNW 3 | WSW 4 | — | — | — | — | — | — | SE 4 | SE 5 | SE 5 | — | — | — | — |
218 | 139 | — | — | — | — | 1 | 2 | — | — | — | — | — | — | 21 | 66 | 53 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 21 | 0 | 0 | 10 | 16 | 22 | 16 | 12 | 0 | 0 | 0 | 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.











