Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef Surf Forecast and Surf Report

Issued: 1 am 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
14.9° 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 23 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 11PM (local time) - 10ft (3.0m), 17s period, SSW swell with cross-onshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 10ft (3.0m), 17s period, SSW swell with 5,464 kJ wave energy.
  • Next surfable swell (1★+): Thursday 23 Jul, 11AM (local time) - 4.5ft (1.4m), 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 Thursday (Jul 23) at 11AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.1m and 13s. 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 3.0m 17s and forecast to arrive on Thursday (Jul 23) at 11PM. 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 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Thu 23rd Jul)4.5ft (1.4m) 11s
Best Surf11PM (Thu 23rd Jul)10ft (3.0m) 17s
Most Powerful11PM (Thu 23rd Jul)10ft (3.0m) 17s

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


The Lowdown

Alright, let’s talk surf. This one’s a bit of a waiting game, but when it fires, it’s worth the wait.

Nine Mile Reef is a reef break that’s fairly consistent, so it doesn’t stay flat for long. The first real window is Thursday morning, July 23rd. We’ve got a 5ft SSW swell with an 11-second period, carrying moderate energy (532). The wind is offshore from the N at 15 mph, so the waves will be clean and lined up. It’s a beginner-friendly spot, but this is a solid, fun session for anyone. The water’s at 59°, which is about average for this time of year.

Thursday afternoon is the standout of the early week. The swell jumps to 6ft from the SSW, the period stretches to 12 seconds, and the energy goes way up (1332). The wind is glassy from the ENE at just 3 mph. This is going to be clean, powerful, and a proper session.

Friday morning, July 24th, is a tease. The swell is a big 8ft from the SSW with a very long 15-second period, a huge surge of energy (2371), and glassy NW wind. Looks perfect, but it’s too big for this break. It’s a washing machine, strictly for experts. The afternoon is similar, with 7ft swell and onshore S wind making it a mess.

Saturday morning, July 25th, brings it back down. 6ft SSW swell, 13-second period, strong energy (1647), and glassy SE wind. Another excellent session for experienced surfers. The swell has some punch, and it’s clean. The afternoon goes onshore, so the morning is the window.

Sunday through Wednesday (July 26th to 29th) is a write-off. The swell drops, the wind turns onshore, and it gets messy. There’s a gap of about 4 days with nothing worth paddling for.

Then, on Thursday, August 4th, things get interesting again. A new swell arrives: 6ft from the SSW, 11-second period, moderate energy (620), and a clean offshore NNW wind at 9 mph. This is a solid, fun, clean session. The morning is the best bet.

Friday, August 5th, keeps it going. 5ft to 6ft SW swell with a very long 15-second period, and a strong offshore N wind at 22 mph. The energy is high (1185-1332), and the waves will have plenty of push. The offshore wind is a bit strong, but it’s still clean.

Saturday, August 6th, is another big one. The swell is 7ft with a 16-second period, and huge energy (2232). Once again, it’s too big for the break for most people. It’s a big, powerful, expert-only day.

The last few days, August 7th, the swell drops back to 5ft, but the wind is onshore and the period is very long, making it tricky.

The Bottom Line: The best bets are Thursday afternoon, July 23rd and Saturday morning, July 25th. Both have clean, glassy conditions and solid, powerful swell. The long-range window on Thursday morning, August 4th is also a promising, cleaner option, but it’s a week and a half away, so keep an eye on it.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Thu afternoon. Very mild (max 18°C on Sat afternoon, min 11°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Sun morning, min 13°C on Sun night). Winds increasing (calm on Sun morning, strong winds from the SE by Tue afternoon).

Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
!
!
!
3
4
2
2
2
1
0
0
0
0
0
0
1
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
11
1.7
SSW
12
3
SSW
16
2.4
SSW
15
2.1
SSW
14
1.8
WSW
14
1.8
SSW
13
1.8
SSW
12
1.5
SSW
12
1.3
SSW
11
1.1
SW
12
1.2
SW
13
1.1
SSW
16
1.7
SSW
16
1.8
SSW
16
2.1
SSW
15
1.9
SSW
14
1.5
SSW
14
1.5
SSW
14
1.4
SSW
14
1.2
SSW
13
Wave Graph
Metric surfscale
Energy kJ
515
808
4784
2349
1874
1222
1060
949
658
426
337
471
612
1451
1566
1898
1504
862
943
765
499
Wind (km/h)
25
N
5
ENE
10
ESE
5
NW
10
S
10
SSE
5
SE
5
S
5
SE
5
S
15
S
20
SSE
25
SE
25
ESE
25
ESE
40
SE
35
SE
20
ESE
15
SE
20
SSE
10
SE
Wind State
off
glassy
cross
glassy
on
cross-on
glassy
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
High Tide
10:47AM0.98m
11:05PM1.09m
12:11PM1.02m
00:20AM1.12m
1:11PM1.10m
1:15AM1.18m
1:54PM1.19m
1:57AM1.26m
2:30PM1.28m
2:33AM1.34m
3:02PM1.37m
3:06AM1.39m
3:33PM1.44m
3:38AM1.43m
Low Tide
4:45PM0.65m
5:57AM0.54m
6:15PM0.62m
7:00AM0.48m
7:16PM0.55m
7:45AM0.40m
8:00PM0.47m
8:21AM0.31m
8:36PM0.39m
8:53AM0.24m
9:09PM0.32m
9:22AM0.18m
9:40PM0.26m
light rain
light rain
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:43
7:43
7:43
7:43
7:41
7:41
7:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:59
6:00
6:00
6:00
6:01
6:02
 mm
1
5
Temp °C
12
12
13
13
15
13
15
18
17
19
19
15
16
17
15
16
16
15
17
20
17
Feels °C
6
11
11
12
13
11
13
16
16
17
16
13
12
12
10
9
9
12
15
18
16
  • Map Icons:
  • Break
  • 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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