Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 1 pm 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
14.8° C
0.6° 

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 29 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 2PM (local time) - 7ft (2.1m), 14s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 5 Aug, 5PM (local time) - 7ft (2.2m), 14s period, SW swell with 1,864 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 8PM (local time) - 4.5ft (1.3m), 13s period with SSW 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 (Jul 29) at 8PM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.1m and 10s. Another secondary swell of 0.5m and 6s is also forecast. 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 2.2m 14s and forecast to arrive on Wednesday (Aug 05) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Aug 05) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 29th Jul)4.5ft (1.3m) 13s
Best Surf 2PM (Wed 5th Aug)7ft (2.1m) 14s
Most Powerful 5PM (Wed 5th Aug)7ft (2.2m) 14s

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


The Lowdown

Alright, Rusty here, let’s talk about what’s coming up at Nine Mile Reef.

Right off the bat, the next few days are looking pretty weak. We’re talking small, marginal surf to start the period. Wednesday the 29th of July has a 4ft SSW swell at 13 seconds, but with a cross-onshore breeze. The water is sitting at 59° and the anomaly is 1° cooler than usual, so it’s a touch cooler than usual for this time of year, but nothing wild. The combined energy is moderate at 754. It’s not a total write-off, but it’s not exactly firing.

Thursday the 30th through Sunday the 2nd of August is a real glass-off period. Thursday morning goes glassy with a 4ft SSW swell, and the wind is SE at 3 mph. That’s clean. The swell holds around the 3ft to 4ft mark through Friday and Saturday, with periods staying in the 12 to 14 second range. The combined energy drops from 487 down to 225. It’s rideable, but nothing to get stoked about. Sunday morning the 2nd of August still has a clean 3ft SW swell, but the energy is fading.

Monday the 3rd of August stays small, with a 3ft SW swell, but the wind switches onshore in the afternoon, so it won’t be as clean.

Then we hit a bit of a lull. Tuesday the 4th of August has a messy, windy day with a 2ft to 3ft swell and strong offshore winds up to 19 mph. That’s not great for quality waves, and the energy is weak at 163. The outlook is poor.

Now, here’s where it gets interesting. There’s a big gap of small, average surf, but then on Wednesday the 5th of August, things start to change. The swell jumps to 6ft from the SW at 15 seconds, and the combined energy is a strong 1336. The wind is offshore from the north at 19 mph Wednesday morning, but by Wednesday afternoon, the swell hits 7ft at 14 seconds, and the energy is way up at 1873. The problem is, the break is a reef, and with that much size, it’s getting into the too-big zone for most. This looks more interesting for kite surfing than paddle surfing.

Thursday the 6th of August through Friday the 7th keeps pumping with 8ft to 8ft SSW and SW swell, periods hitting 14 to 15 seconds, and combined energy in the 2000s. The wind is mainly cross-offshore or offshore, but the swell is too big for this break. The reef will be cranking, but it’s really only for experts.

Saturday the 8th of August turns ugly. Rain showers, strong cross-onshore wind, and an 8ft swell. The energy is intense at 2999, but the conditions are poor. The same goes for Sunday the 9th and Monday the 10th of August, when the swell is up to 10ft to 12ft, and the combined energy is over 3000. It’s huge, but messy and onshore.

Tuesday the 11th of August is a standout for the sheer size – 15ft from the SSW at 10 seconds, with glassy conditions in the morning. The combined energy is a massive 6216. That is a serious amount of water moving. But with a 10-second period, it’s a shorter-period swell, and on a reef, that’s going to be a heavy, unruly wave. Definitely experts only, and you’d want to be careful.

The period starts to settle after that. Wednesday the 12th of August has a 7ft SW swell at 15 seconds, but the wind is cross-onshore, so it’s marginal. The real highlight for the second week comes on Thursday the 13th of August. The swell drops to 5ft from the SW at 14 seconds, and the wind goes glassy from the NE at 3 mph in the morning. The combined energy is a solid 975. This is the best-looking day for a decent paddle. The swell is a good size, the period is long, and the wind is glassy. This is a day to get in the water.

That’s the run, mates. A slow start, a big, gnarly middle section, and a glassy finish. Keep an eye on that Thursday the 13th.

- Rusty

Short Range Forecast

Mostly dry. Warm (max 21°C on Fri afternoon, min 14°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 23°C on Sat afternoon, min 11°C on Mon night). Wind will be generally light.

Wed
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
2
2
2
1
1
2
2
1
2
1
2
2
1
1
1
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)
1.3
SSW
13
1.3
SSW
13
1.1
SSW
13
1
SSW
13
0.9
SW
13
0.8
SW
12
0.6
SW
12
0.6
SW
11
0.7
SW
14
0.8
SW
13
0.7
SW
13
0.8
SW
13
0.8
SW
12
0.9
SSW
14
0.9
SW
13
0.9
SW
12
0.8
SW
11
0.8
SW
11
0.7
SW
11
0.6
SSW
15
Wave Graph
Metric surfscale
Energy kJ
634
545
421
351
249
175
116
82
198
199
171
202
181
352
265
236
145
140
110
158
Wind (km/h)
10
SSW
10
ENE
5
SE
5
S
5
ENE
5
SE
5
S
5
ENE
0
NNE
5
S
0
ESE
5
NNW
5
SSW
5
N
5
NNW
10
S
10
N
20
N
30
NW
25
N
Wind State
cross-on
cross-off
glassy
glassy
cross-off
glassy
glassy
cross-off
glassy
glassy
glassy
cross-off
cross-on
off
cross-off
on
off
off
cross-off
off
High Tide
3:33PM1.44m
3:38AM1.43m
4:03PM1.50m
4:09AM1.45m
4:33PM1.54m
4:40AM1.44m
5:02PM1.55m
5:12AM1.41m
5:34PM1.53m
5:47AM1.36m
6:08PM1.49m
6:26AM1.29m
6:47PM1.42m
Low Tide
9:40PM0.26m
9:51AM0.13m
10:11PM0.22m
10:19AM0.12m
10:42PM0.20m
10:47AM0.13m
11:13PM0.20m
11:16AM0.16m
11:46PM0.22m
11:48AM0.21m
00:24AM0.26m
12:25PM0.29m
1:08AM0.32m
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:39
7:39
7:37
7:37
7:35
7:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:02
6:04
6:05
6:05
6:06
6:07
 mm
Temp °C
18
17
15
18
17
19
21
20
20
23
19
18
21
17
17
20
16
14
17
14
Feels °C
16
15
13
17
15
17
18
18
18
20
16
15
19
15
15
18
14
10
12
10
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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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