Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 7 pm 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
15.2° C
0.2° 

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 19 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 11PM (local time) - 8ft (2.4m), 16s period, SSW swell with cross-onshore winds.
  • Most powerful swell: Friday 24 Jul, 2AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,336 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 2AM (local time) - 5ft (1.6m), 11s period with SW 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 (Jul 20) at 2AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.3m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Nine Mile Reef in the next 16 days are 2.5m 16s and forecast to arrive on Friday (Jul 24) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Thursday (Jul 23) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Mon 20th Jul)5ft (1.6m) 11s
Best Surf11PM (Thu 23rd Jul)8ft (2.4m) 16s
Most Powerful 2AM (Fri 24th Jul)8ft (2.5m) 16s

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


The Lowdown

Alright folks, Rusty here. Let’s take a look at what’s on the cards for Nine Mile Reef.

The next couple of weeks have a bit of everything, but the real standout is shaping up to be Tuesday morning, 21 July, with glassy conditions and a solid, long-period groundswell that’ll have the reef firing. It’s a reef break, so with that long period swell (14 seconds) it’s going to hold up nicely, with proper shape and plenty of energy. The combined swell energy is strong (1397), and the wind is glassy – that’s about as good as it gets for a morning session. This one is for experienced surfers though, as the swell is 6ft. If you can handle it, this is the pick of the forecast.

The build-up to that starts Monday morning, 20 July, with a clean 4ft swell from the SW and a gentle offshore breeze. It’s a modest start, but a nice way to ease in. The water temperature is about average for the time of year, so nothing unusual there.

After Tuesday’s peak, Wednesday morning, 22 July, keeps the quality going with a clean 5ft swell and light offshore wind. The period drops to 12 seconds, still a decent groundswell, and the energy is moderate (606). It’s a very good option, but not quite the standout.

Thursday, 23 July, stays consistent with a gentle offshore breeze and a 5ft to 5ft SW swell. Clean, rideable, and reliable. The energy is moderate (666). A solid choice for a mid-week session.

Now, Friday, 24 July, brings a tricky one. The morning is glassy with a 8ft SSW swell, but that’s getting too big for this reef. The combined energy is very strong (2306), and the forecast says it’s too big for this break. Afternoon sees the wind turn onshore, so it’s a day to sit out unless you’re a very experienced local who knows the reef.

Saturday, 25 July, is messy with cross-onshore winds and a 6ft swell. The energy is still strong (2023), but the wind is going to make it lumpy. Not the best call.

Sunday, 26 July, sees a nice calm return. Glassy conditions, a 4ft SW swell, and clean waves. The energy is moderate (455). A good morning for a longboard or a fun board.

Monday, 27 July, starts glassy with a 5ft SW swell and moderate energy (677). A good option, but the afternoon turns ugly with a fresh cross-onshore breeze at 30 km/h and lumpy conditions. Get out early.

Tuesday, 28 July, and Wednesday, 29 July, are poor. Cross-onshore winds, bumpy, and generally not worth the paddle. Wednesday has a 7ft swell, but the wind ruins it.

Thursday, 30 July, brings a return to glassy conditions. A 5ft SSW swell and moderate energy (603). Clean and fun. A good one to look forward to.

Friday, 31 July, has a moderate offshore breeze, but the swell is small (3ft) and the energy is low (312). It’s clean, but not very powerful. The afternoon gets blown out.

Saturday, 1 August, and Sunday, 2 August, are write-offs. Gale-force winds, rain, and tiny, messy swell. The energy is weak (147 and 118). Don’t bother.

But then, Monday, 3 August, has a big red circle on the calendar. The morning is glassy, with a 6ft SW groundswell and a very long period of 15 seconds. The combined energy is very strong (1635). This is another one for experienced surfers only, as the size and power will be intense. The long period will make the waves feel bigger and more powerful, and at a reef, it’ll be a serious session. It’s over a week away, so things could change, but it’s promising.

Tuesday, 4 August, also has a 7ft SW swell, but the forecast warns it might be too big for the break. The wind is a gentle offshore, so if you’re a charger, it might be worth a look, but it’s pushing the limits.

So, to sum it up: the absolute best is Tuesday morning, 21 July, for the glassy, long-period, powerful groundswell. The second standout is Monday morning, 3 August, for a similar, very powerful session. The rest of the time has plenty of clean, fun, smaller waves, especially on the mornings of 22, 23, 26, 27, and 30 July. Don’t waste your time on the 25, 28, 29, 1, or 2 August.

Rusty out.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Mon afternoon, min 11°C on Wed morning). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 20°C on Sat afternoon, min 12°C on Wed night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
2
4
2
3
3
3
2
3
3
!
!
!
3
3
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
11
1.2
SW
9
0.9
SW
8
0.7
SSW
16
1.9
SSW
14
1.9
SSW
13
1.6
SW
12
1.4
SW
12
1.4
SSW
11
0.9
SSW
12
1.5
SW
11
1.6
SW
10
2.5
SSW
16
2.4
SSW
14
2.1
SSW
14
1.7
SSW
13
1.8
SSW
13
1.7
SSW
12
1.4
SSW
12
Wave Graph
Metric surfscale
Energy kJ
548
246
118
259
1376
1303
766
597
492
236
505
540
3336
2285
1697
1058
1103
905
536
Wind (km/h)
15
N
15
N
10
WNW
5
NNE
5
SSE
15
S
0
WSW
10
NNW
15
NNW
20
N
15
N
10
N
5
ESE
5
S
15
S
10
SE
5
SSE
10
SSE
5
ESE
Wind State
off
off
cross-off
glassy
glassy
on
glassy
off
cross-off
off
off
off
cross-on
glassy
on
cross-on
cross-on
on
cross
High Tide
7:21AM1.18m
7:44PM1.32m
8:12AM1.08m
8:35PM1.21m
9:19AM1.01m
9:42PM1.12m
10:47AM0.98m
11:05PM1.09m
12:11PM1.02m
00:20AM1.12m
1:11PM1.10m
1:15AM1.18m
Low Tide
1:24AM0.34m
1:19PM0.39m
2:13AM0.44m
2:07PM0.51m
3:13AM0.52m
3:11PM0.61m
4:33AM0.56m
4:45PM0.65m
5:57AM0.54m
6:15PM0.62m
7:00AM0.48m
7:16PM0.55m
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:46
7:46
7:45
7:43
7:43
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:55
5:57
5:57
5:58
5:59
5:59
6:00
 mm
Temp °C
14
14
17
14
14
15
13
13
15
13
13
14
14
15
17
15
17
20
19
Feels °C
12
11
15
12
13
13
11
11
12
10
9
12
13
15
16
13
16
18
18
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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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