Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 7 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
14.4°C
1.2° 

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 4 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 5AM (local time) - 7ft (2.1m), 7s period, SE swell with cross-shore winds.
  • Most powerful swell: Sunday 6 Sep, 8AM (local time) - 5.5ft (1.7m), 19s period, SSW swell with 2,121 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 5AM (local time) - 7ft (2.1m), 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 Saturday (Sep 05) at 5AM. The primary swell is predicted to be 2.1m and 7s period with a secondary swell of 0.4m and 13s. Another secondary swell of 0.3m and 10s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.7m 19s and forecast to arrive on Sunday (Sep 06) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sat 5th Sep)7ft (2.1m) 7s
Best Surf 5AM (Sat 5th Sep)7ft (2.1m) 7s
Most Powerful 8AM (Sun 6th Sep)5.5ft (1.7m) 19s

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


The Lowdown

Alright, this is Rusty, and I’m looking at what we’ve got on the menu for Nine Mile Reef over the next couple of weeks. Gotta be straight with you: it’s a rough start. The first several days are a write-off.

Imperial

Right off the bat, Friday the 4th and Saturday the 5th are a no-go. We’re looking at a strong cross-onshore wind and lumpy, messy surf. The swell is there – 8ft to 10ft from the SSE, period a short 8 to 9 seconds – but it’s just a blown-out, ugly mess. The water sits at 58°, a bit colder than usual for this time of year.

Sunday the 6th is *almost* there. Swell drops to 6ft, but it’s a very long period groundswell of 18 seconds from the SSW. That kind of period means proper energy (combined energy of 2080), but at a reef like this with a cross-onshore breeze, it’s gonna be frustrating. Hard to get into a rhythm.

Now, Monday the 7th is where it gets interesting. The wind goes light and cross-offshore, and we’ve got a clean, 4ft SSW swell. It’s not huge, but the conditions are right for some fun, lined-up waves. The 14-second period will have a bit of punch and those longer lulls. This is a real standout for the near term – a solid, clean option for a beginner-friendly reef.

After that, it gets small. Tuesday the 8th morning is glassy but only 3ft – a little too small for much. The rest of that week stays tiny and mostly blown out by onshore winds.

We hit a dead zone from around Saturday the 12th through to Monday the 14th of September, with strong winds and poor surf, despite some solid 7ft swell. Not worth paddling out.

But then, the long-range window opens up with some real promise. Tuesday the 15th and Wednesday the 16th start to clean up. Wednesday the 16th is a beaut – glassy in the morning (4ft, 12 seconds), then a clean, light cross-offshore breeze in the afternoon with a solid 3ft groundswell. That afternoon session is a sleeper hit.

Then, a big change. On Thursday the 17th of September, the wind goes moderate offshore from the north, and we’re looking at a massive 8ft to 10ft SSW swell. The combined energy is pumping hard at 3565 to 3882. The thing is, for a beginner reef like Nine Mile, that’s just too much. It’s an expert-only affair that day. If you know what you’re doing, it could be a proper, heavy session, but for most of us, that’s a watch-from-the-beach day.

The swell stays big on Friday the 18th, but the wind swings onshore again, ruining it. We end the outlook on Saturday the 19th with a drop back to 6ft, but the wind is back on it.

So, the standout window is Monday the 7th of September for clean, fun waves, and keep an eye on Wednesday the 16th of September for another clean session. The big stuff on the 17th is for experts only.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sun afternoon, min 10°C on Sat morning). Winds decreasing (strong winds from the SE on Fri afternoon, light winds from the NNE by Sun night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
2
2
3
4
3
2
3
2
0
0
0
0
1
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SSE
9
3
SSE
8
2.1
SE
7
1.9
SE
7
2
SE
7
1.3
SSW
21
1.7
SSW
18
1.4
SSW
16
1.3
SSW
15
1.3
SSW
14
1.3
SSW
13
1.3
SSW
12
0.8
S
11
0.6
SW
11
0.4
SW
14
0.5
SW
13
0.6
SW
13
0.8
SW
17
1.6
SW
15
1.6
SW
14
1.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
897
980
456
341
379
1498
1880
969
711
662
577
452
149
97
56
85
100
342
1011
998
801
Wind (km/h)
35
ESE
45
SE
25
ESE
25
ESE
30
ESE
20
ESE
10
ESE
10
SE
5
ENE
10
NW
10
SSW
5
SSE
5
SW
10
S
10
SSW
15
SSW
15
S
10
S
15
S
30
S
25
SSE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-off
cross-off
cross-on
glassy
glassy
on
on
cross-on
on
on
on
on
cross-on
High Tide
8:29PM1.16m
9:45AM1.04m
10:28PM1.13m
11:38AM1.12m
00:04AM1.21m
12:47PM1.28m
1:06AM1.34m
1:36PM1.44m
1:53AM1.45m
2:16PM1.58m
2:33AM1.53m
2:52PM1.67m
3:10AM1.57m
Low Tide
1:54PM0.54m
3:13AM0.52m
3:57PM0.60m
5:15AM0.49m
5:55PM0.51m
6:33AM0.36m
7:03PM0.36m
7:24AM0.23m
7:51PM0.21m
8:05AM0.12m
8:32PM0.09m
8:42AM0.05m
9:09PM0.02m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:00
6:58
6:56
6:56
6:54
6:52
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:28
6:29
6:30
6:30
6:30
6:31
6:32
 mm
Temp °C
16
18
13
16
20
16
20
26
23
24
27
21
21
24
18
19
20
15
16
17
14
Feels °C
8
8
6
11
15
11
18
25
22
23
27
22
21
25
17
18
19
14
13
13
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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