Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 1 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
14.3°C
1.3° 

Nine Mile Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nine Mile Reef surf forecast from 25 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 5PM (local time) - 7.5ft (2.3m), 7s period, SE swell with cross-onshore winds.
  • Most powerful swell: Tuesday 25 Aug, 8AM (local time) - 5ft (1.6m), 15s period, SW swell with 1,124 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 5PM (local time) - 7.5ft (2.3m), 7s period with SE 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 5PM. The primary swell is predicted to be 2.3m and 7s period with a secondary swell of 1.1m and 12s. Another secondary swell of 1.1m and 8s is also forecast. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.6m 15s and forecast to arrive on Tuesday (Aug 25) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Thursday (Aug 27) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Wed 26th Aug)7.5ft (2.3m) 7s
Best Surf 5PM (Wed 26th Aug)7.5ft (2.3m) 7s
Most Powerful 8AM (Tue 25th Aug)5ft (1.6m) 15s

Table - best surf conditions forecast for Nine Mile Reef over the next 16 days.


The Lowdown

Righto, Rusty here. Let’s take a look at what’s going on at our local spot, Nine Mile Reef. There’s a bit of a slow start, but the long-range looks like it could hold something special, so pay attention.

We’re kicking off Tuesday the 25th of August, but honestly, the first few days are a write-off. Tuesday morning has a 5ft SW swell running at 15 seconds, which gives the water some decent energy (1299), but the wind is cross-on from the SE at 12 mph, making it choppy and unappealing. The water temp is sitting at 58°, which is a bit colder than normal for this time of year – you’ll want a good hood. Tuesday afternoon and all of Wednesday are similar stories: too much cross-wind or onshore wind, mediocre swell heights, and nothing worth paddling for.

Thursday the 27th is where it finally starts to look interesting. The morning offers a clean 4ft groundswell from the S with a period of 11 seconds (559 energy), and best of all – offshore wind from the NNW at 9 mph. That means clean, lined-up waves. This is a reef break, so a long-period S swell like this will wrap in nicely and hold its shape. Crowds at Nine Mile Reef are sometimes there, but with conditions like that early, you might get a few clean ones before it gets busy.

Friday the 28th is a step back – onshore winds and weaker swell, so take Thursday and run with it.

If you’re looking further ahead, keep an eye on Wednesday the 2nd of September. The morning session looks excellent for experienced surfers: 6ft SW swell at 13 seconds, pumping out strong energy (1247), with a moderate offshore breeze from the N at 12 mph. Clean, powerful, and solid. That’s a standout, but note this swell is over 5ft – it’s a step up, so maybe not one for the beginners. The break is fairly consistent, and with a good offshore wind, it’ll be well-shaped.

Later that day and into Thursday the 3rd, we see a massive spike in energy – 13ft SW at 12 seconds on the Thursday afternoon, with energy reading 7446. That’s a whole lot of power, but the wind is cross-on from the ESE at 12 mph, and the forecast warns the swell is too big for Nine Mile Reef. With those numbers, it’s really only for the experts, and even then, that cross-on wind and size could make it a messy beast. That might be one better suited for kite surfing.

After that, through the first week of September, the swell drops off dramatically. Saturday the 5th has a 2ft SW swell with a very long 23-second period, but it’s onshore wind and weak energy (577) – not worth it. Sunday the 6th afternoon gives us a brief moment of glassy conditions with a light SSW breeze and a 3ft swell from SW at 14 seconds, which could produce some clean little waves if you’re keen for a small session. But it’s tiny.

Overall, the best pick in this window is Thursday morning the 27th of August, with clean offshore winds and a nice 4ft S swell. The real heavy-duty standout is Wednesday morning the 2nd of September, with strong offshore conditions and solid 6ft SW swell for the experienced crew. The rest of the 16 days has long gaps of poor or marginal surf, so don’t expect much beyond those windows.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 24°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Fri afternoon, min 14°C on Fri night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
!
3
3
2
1
1
0
0
1
0
1
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
15
1.3
SW
14
1.1
SW
13
0.7
SW
12
2.3
SE
7
1.3
S
12
1.3
S
11
1.3
S
11
1.1
S
11
1.1
S
11
0.9
S
10
0.6
SW
13
0.6
SW
13
0.7
SW
15
0.9
SW
14
0.8
SW
13
1
SW
12
1.6
SSE
8
1.1
SW
12
1.1
SW
11
0.9
SW
11
Wave Graph
Metric surfscale
Energy kJ
1034
676
437
157
569
456
441
426
289
277
172
134
138
239
276
232
292
333
298
263
191
Wind (km/h)
20
SE
25
SE
20
ESE
15
ESE
5
SE
10
N
15
NNW
10
W
5
SSE
10
S
10
S
10
SSW
10
SSW
15
S
10
SSE
25
SSE
30
S
25
SSE
20
SSE
20
S
10
S
Wind State
cross-on
cross-on
cross-on
cross
cross-on
off
off
cross
on
on
on
on
cross-on
on
on
on
on
on
on
on
on
High Tide
2:09PM1.32m
2:14AM1.35m
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
Low Tide
8:17PM0.35m
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
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
cloud
cloud
part cloud
cloud
cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:11
7:11
7:09
7:07
7:07
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:22
6:22
6:23
6:23
6:24
6:25
 mm
Temp °C
16
20
15
17
23
21
21
24
16
17
18
16
17
17
15
16
17
14
15
15
13
Feels °C
12
16
11
14
21
20
17
20
15
15
16
15
16
15
14
12
12
9
11
10
10
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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