Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 1 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
14.8°C
0.8° 

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 28 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 2AM (local time) - 4ft (1.2m), 11s period, SW swell with glassy winds.
  • Most powerful swell: Wednesday 2 Sep, 5AM (local time) - 10ft (3.0m), 19s period, SSW swell with 7,207 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 11AM (local time) - 3.5ft (1.0m), 11s 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 Friday (Aug 28) at 11AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.4m and 14s. 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 3.0m 19s and forecast to arrive on Wednesday (Sep 02) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Fri 28th Aug)3.5ft (1.0m) 11s
Best Surf 2AM (Tue 1st Sep)4ft (1.2m) 11s
Most Powerful 5AM (Wed 2nd Sep)10ft (3.0m) 19s

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


The Lowdown

Alright, Rusty here, giving you the run-down for the local stretch. Let's be honest, looking at the whole 16-day window, it’s a proper mixed bag. We’ve got some clean, glassy windows early on but they are tiny, and then a big pulse of swell rolls through, but it’s going to be howling. The standout sessions are few and far between.

We’ll kick things off with Nine Mile Reef. The water temp is sitting at 59°, which is about 1° cooler than average for this time of year, so pretty standard, nothing wild.

Right off the bat, we've got a window on the morning of Friday, August 28. The wind is dead calm, glassy as a lake. We’re looking at a 3ft S swell ticking in at 11 seconds. The combined energy is moderate at 299. It’s not big, but with zero wind, it’ll be clean and gentle – a proper beginner-friendly session. This is your best bet for the first week.

The afternoon of Friday and pretty much all of Saturday and Sunday get blown to pieces by onshore winds. The swell builds, hitting 5ft on Sunday morning with a combined energy of 786, but the wind is howling out of the SSE at 16 mph, making it a complete write-off.

Monday the 31st and Tuesday the 1st of September are still messy. Tuesday morning has a bit more push with a 6ft SSW groundswell (14 second period) and combined energy hitting 1176, but the wind is cross-shore. It’s going to be lumpy and a bit of a gamble.

Then we hit a rough patch. From Wednesday, September 2 right through to Thursday, September 4, the swell gets serious. We’re talking 10ft on Wednesday morning with a massive combined energy reading of 5046. That’s a lot of water moving. The problem is the wind is a strong cross-onshore at 19-31 mph. The setup here at the reef will be a washing machine. Honestly, with that much wind and that size, this is looking more like a kite-surfing zone than a paddling spot.

Now, the real contender for the best on offer comes on Saturday, September 5. The morning kicks off with clean offshore wind from the NNW at 6 mph. The swell is a solid 8ft from the SSE at a shorter period of 9 seconds. The combined energy is 922. The wind is clean, but the forecast says this swell is predicted to be too big for this break. This one is for experienced surfers only, and even then, it’s going to be a heavy beast.

After that, the energy drops right off. Sunday the 6th of September has some clean, moderate offshore winds in the morning with a 4ft S swell, but it’s weak. The rest of the second week into Monday, September 7 and beyond is mostly small, weak, and onshore. There’s a small window on the morning of Monday the 7th with glassy conditions and a mellow 1ft SW swell, but the combined energy is a minuscule 128. It’s surfable, but it’s barely a ripple.

The long-range stuff around Saturday, September 12 shows a 4ft SW groundswell with a 15-second period and clean cross-offshore winds, but the combined energy is only moderate at 577. It’s promising, but it’s a long way out and could change. Don't plan your week around it yet.

Bottom line: If you want the cleanest, most user-friendly waves, be on the water Friday morning, August 28. If you’re an expert and hungry for some real power, keep an eye on Saturday, September 5, but respect the forecast warning about the size. Everything else is small, blown out, or too far out to trust.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sat afternoon. Very mild (max 19°C on Fri morning, min 12°C on Sun night). Winds increasing (calm on Fri morning, fresh winds from the S by Sun afternoon).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Tue afternoon, min 11°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SE by Wed afternoon).

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
1
1
0
0
0
0
0
1
0
3
3
2
0
0
0
0
0
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)
1
S
11
0.9
S
10
0.6
SW
13
0.8
SW
13
0.6
SW
14
0.9
SW
13
1.6
SW
12
1.3
SW
12
1.1
SW
12
1.1
SW
11
1.1
SW
11
1.2
SW
11
1.7
SSW
14
1.7
SSW
13
2.1
SSW
14
3
SSW
16
3
SSW
15
2.2
SSW
14
1.7
SSW
12
1.1
SW
12
2.2
SSE
7
Wave Graph
Metric surfscale
Energy kJ
229
175
136
215
164
286
736
457
349
288
263
334
1176
932
1590
5046
3410
1748
835
330
471
Wind (km/h)
0
NW
10
SSE
10
SSE
10
ESE
20
S
20
SSE
25
SSE
30
S
15
SSE
10
S
15
S
0
SSE
5
W
10
SW
20
SSE
30
SE
30
SE
25
SE
40
SE
45
SE
50
SE
Wind State
glassy
on
on
cross-on
on
on
on
on
on
on
on
glassy
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
3:33PM1.60m
3:44AM1.52m
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
Low Tide
9:22AM0.09m
9:44PM0.11m
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
clear
part cloud
cloud
cloud
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
light rain
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:09
7:07
7:07
7:05
7:03
7:03
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:23
6:23
6:24
6:25
6:25
6:27
6:28
 mm
1
2
2
Temp °C
19
19
17
17
19
14
14
15
13
14
15
13
14
17
16
14
16
14
13
15
14
Feels °C
18
18
16
15
15
9
8
8
8
11
11
10
13
14
15
8
9
8
5
5
5
  • 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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