Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 1 pm 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
12.5°C
3.1° 

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 7 Sep 2026:

  • Best quality surf: Monday 7 Sep, 11PM (local time) - 3.5ft (1.1m), 12s period, S swell with glassy winds.
  • Most powerful swell: Saturday 12 Sep, 8PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with 1,633 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 11PM (local time) - 3.5ft (1.1m), 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 Monday (Sep 07) at 11PM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.6m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Nine Mile Reef in the next 16 days are 1.7m 16s and forecast to arrive on Saturday (Sep 12) at 8PM. 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 Monday (Sep 14) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 7th Sep)3.5ft (1.1m) 12s
Best Surf11PM (Mon 7th Sep)3.5ft (1.1m) 12s
Most Powerful 8PM (Sat 12th Sep)5.5ft (1.7m) 16s

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


The Lowdown

Right then, let's have a look at what's on offer for the next few weeks.

Alright, so we're looking at Nine Mile Reef. The water is much colder than normal for this time of year, sitting at 55°F right now, so that's a bit of a shock to the system. Don't let that put you off, though.

The stand-out session in this whole run is hands down Monday morning, September 7th. It's going to be a crystal clear morning with glassy conditions. The swell is a solid 5ft from the SSW, with a period of 14 seconds, giving it some real grunt. The combined energy is sitting at 767 (moderate), but the wind is absolutely dead – a light 3 mph from the WNW, making it glass. This is the one to get out of bed for; it's going to be clean and lined up.

Tuesday morning, September 8th is also a decent call. The wind has dropped to nothing, absolute calm, and you've got 3ft of swell from the S at 11 seconds. It's a small day, but the combined energy is 266 (weak), and the glassy conditions will make it super fun on a log or a mid-length. A good morning for a quiet paddle.

We then hit a bit of a rough patch. From Wednesday, September 9th through to Saturday, September 12th, the winds get messy, with strong onshore and cross-onshore breezes. The swell actually looks interesting on Thursday morning, September 10th, with a 5ft swell from the SW and a long 15-second period, giving a combined energy of 1138 (moderate). But the wind is a solid 9 mph onshore from the S, so it's going to be a messy, lumpy affair. Save your energy.

Things clean up again on Sunday morning, September 13th. Another glassy morning, with a light 3 mph from the NE. The swell is 4ft from the SSW at 14 seconds, with a combined energy of 801 (moderate). That's a good bet for a session.

Then we get a run of offshore winds. Monday, September 14th has a moderate offshore breeze from the N, with 3ft to 4ft of SSW swell. It's clean, but the combined energy is only 325-392 (weak). It's rideable, but not the best of the run.

Now, a word of warning for Wednesday, September 16th. The swell is predicted to be a proper 8ft from the SW, with a very long 16-second period and a combined energy of 3854 (strong). That's a lot of water moving. This is too big for the break, and really only for the experts. The wind is onshore, so it's going to be a washing machine. If you're not a solid, experienced surfer, give this one a wide berth. The setup looks more interesting for kite surfing than paddle surfing.

The last few days of the run are a mixed bag. Friday morning, September 18th has a clean offshore wind from the N, with 4ft of S swell at 10 seconds. It's a short period, so it's a bit of a windswell, but the combined energy of 493 (weak) and clean conditions will make it a worthwhile session.

Sunday morning, September 20th has a clean 4ft from the SW at 14 seconds, but the 6 mph onshore wind will chop it up.

So, to wrap it up: your absolute best bet is Monday morning, September 7th. The glassy conditions and solid, long-period groundswell will make for a classic reef day. Sunday the 13th is a solid second choice. The rest of the run is either too windy, too small, or too big. Get out there on the 7th.

Rusty

Short Range Forecast

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

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Sun morning. Very mild (max 18°C on Thu afternoon, min 13°C on Fri night). Mainly fresh winds.

Mon
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SSW
13
1.2
SSW
12
0.8
S
11
0.6
SW
11
0.4
SW
15
0.6
SW
13
0.6
SW
13
0.8
SW
12
1.5
SW
15
1.3
SW
14
1.1
SW
13
2.1
SSE
7
2.3
SSE
7
1
SW
14
1.4
SW
15
1.7
SSW
17
1.7
SSW
15
1.4
SSW
14
1.2
SW
13
1.1
SW
13
Wave Graph
Metric surfscale
Energy kJ
569
387
144
75
75
109
106
210
949
696
431
413
523
387
905
1588
1255
763
525
382
Wind (km/h)
10
S
0
NE
10
SSW
15
S
5
S
10
S
15
S
10
SSE
20
S
30
S
25
SSE
30
SE
30
SSE
20
SE
30
SE
30
SE
20
ESE
15
ESE
10
SSE
10
NNW
Wind State
on
glassy
cross-on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
off
High Tide
1:06AM1.34m
1:36PM1.44m
1:53AM1.45m
2:16PM1.58m
2:33AM1.53m
2:52PM1.67m
3:10AM1.57m
3:26PM1.71m
3:44AM1.57m
3:58PM1.70m
4:16AM1.53m
4:29PM1.64m
4:47AM1.46m
Low Tide
7:03PM0.36m
7:24AM0.23m
7:51PM0.21m
8:05AM0.12m
8:32PM0.09m
8:42AM0.05m
9:09PM0.02m
9:16AM0.02m
9:43PM-0.01m
9:48AM0.03m
10:15PM0.02m
10:19AM0.08m
10:45PM0.08m
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
cloud
light rain
light rain
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:30
6:31
6:32
6:32
6:34
6:35
 mm
1
3
Temp °C
27
22
23
24
21
19
18
15
18
18
15
16
15
14
16
16
15
17
19
18
Feels °C
26
22
22
24
20
18
15
13
15
14
11
11
10
10
12
11
11
16
18
19
  • 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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