Nine Mile Reef surfForecast / Cape Town / South Africa

information circle12 Day Weather and Surf, issued 1 pm Sunday 17 Aug 2025 SAST
Forecast update in hr  min  s Forecast update imminent
Nine Mile Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nine Mile Reef sea temperature is
14.8° C
(Which is slightly cooler than normal)


Best Forecast Surf Conditions for Nine Mile Reef this week:

The surf forecast for Nine Mile Reef over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 17) at 8PM. The primary swell is predicted to be 0.4m and 14s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Nine Mile Reef in the next 12 days are 3.5m 12s and forecast to arrive on Saturday (Aug 23) 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 1.0m 4s period and expected on Wednesday (Aug 20) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sun 17th Aug)1.5ft (0.4m) 14s
Best Surf 5AM (Thu 21st Aug)10ft (3.0m) 11s
Most Powerful 8PM (Sat 23rd Aug)11ft (3.5m) 12s

Table - best surf conditions forecast for Nine Mile Reef over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 19°C on Mon afternoon, min 13°C on Wed morning). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 11mm), heaviest on Sat morning. Very mild (max 18°C on Wed afternoon, min 11°C on Fri night). Wind will be generally light.

Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
Swell
Height Map
Wave Height (m) & direction (?)
0.4
SW
0.4
SW
0.6
SW
0.8
SW
1.4
SW
1.6
SW
1.4
SW
1.3
SW
1
SW
0.8
SW
1.6
SW
1.6
SW
1.5
SW
1.1
SSW
1.3
SW
1.1
SW
1.9
SW
2.2
SW
2.5
SW
2.5
SSW
2.5
SSW
Period(s) (?)151917161615141312121211111210101413131313
Wave
Graph
(?)Metric surfscale
Energy (?)1221463103451049113779755529417471162950550241844313501659195122412052
Wind
(km/h)
10
NW
5
SSE
10
NNW
15
NW
15
N
10
NNW
5
SSW
5
NNE
20
NNW
25
NNW
15
NNW
20
NW
20
NW
15
NNW
20
NNW
20
NW
15
N
20
WNW
25
W
10
SSE
15
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
glassoffcross-
off
offoffonglassoffcross-
off
offcross-
off
cross-
off
offoffcross-
off
offcross-
off
crossonon
High Tide
/ height (m)
10:21PM
1.16
11:34AM
1.08
12:00AM
1.19
12:53PM
1.20
1:09AM
1.28
1:45PM
1.33
1:59AM
1.38
2:27PM
1.45
2:39AM
1.45
3:02PM
1.54
3:14AM
1.49
3:35PM
1.60
3:47AM
1.50
Low Tide
/ height (m)
3:48PM
0.58
5:12AM
0.48
5:46PM
0.55
6:38AM
0.40
7:04PM
0.43
7:34AM
0.29
7:57PM
0.31
8:16AM
0.19
8:39PM
0.21
8:52AM
0.12
9:16PM
0.14
9:25AM
0.08
9:49PM
0.11
9:54AM
0.07
Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunrise--7:20--7:20--7:18--7:18--7:16--7:15--7:13
Sunset6:15--6:16--6:16--6:17--6:19--6:19--6:20--
clearclearclearclearpart cloudpart cloudclearclearclearclearrain showersclearpart cloudpart cloudcloudpart cloudrain showersmod rainrain showerspart cloudclear
Rain (mm)
----------2-----273--
Temp. °C181716191516181516181515151314151313141312
Feels °C (?)1617141613151715131312101010910109888
  • 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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Eyeball surf reportRecent Eyeball Surf Reports for Cape Town

  1. weather stationWind Update Continuing clean conditions at Nine Mile Reef (calm at Somerset West 14 km from Nine Mile Reef). 1.0m 11s groundswell from the SSE with a 0.7m 15s groundswell from the SSW and a 0.5m 11s groundswell from the SW. 3 swells combining so expect closeout sets.

    Nine Mile Reef
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1 h 2 min ago

2 km/h
SSE
Clean
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nine Mile Reef surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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 12 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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