Nine Mile Reef Surf Break

Lat Long: 34.07° S 18.66° E

Nine Mile Reef 48 hour detailed Surf Forecast

Issued: 1 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nine Mile Reef sea temperature is
13.9° C
1.7° 

Nine Mile Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Nine Mile Reef today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 5ft (1.5m), 13s period with SW swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 6ft (1.8m), 13s period with SW swell.
  • Evening surf: Evening surf (18 Aug, local time) - 6.5ft (2.0m), 13s period with SSW swell.

The current surf forecast for Nine Mile Reef at 7PM is: 2.0m 13s primary swell from a South-southwest direction and 0.4m 3s secondary swell from a South-southeast direction (forecast issued at 01:00pm August 18). The wind direction is predicted to be onshore.

Time (SAST) & DateWave HeightWave Period
Morning (18 Aug)5ft (1.5m)13s
Afternoon (18 Aug)6ft (1.8m)13s
Evening (18 Aug)6.5ft (2.0m)13s

Table - waves today at Nine Mile Reef. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Very mild (max 15°C on Tue afternoon, min 11°C on Fri morning). Wind will be generally light.

Tue
18
Wednesday
19
Thursday
20
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
2
1
0
1
3
3
2
1
0
1
1
3
3
3
!
!
!
!
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SW
12
1.6
SW
13
1.9
SW
13
2
SSW
13
2
SSW
12
1.9
SSW
12
1.8
SW
12
1.8
SW
12
1.7
SSW
12
1.7
SSW
12
1.6
SW
12
1.6
SW
12
1.6
SW
12
1.8
SSW
13
2.4
SSW
14
2.5
SSW
14
2.3
SSW
13
2.1
SSW
13
2
SSW
13
1.8
SSW
12
1.8
SSW
12
Wave Graph
Metric surfscale
Energy kJ
1025
878
1147
1250
1192
1073
964
948
808
795
718
730
742
1100
2129
2244
1859
1452
1230
1000
919
Wind (km/h)
10
S
20
S
20
S
20
SSE
10
SE
10
SSE
10
S
10
S
15
S
15
SSW
10
S
5
SE
5
SE
5
ESE
10
SSE
5
SE
10
S
20
S
20
S
20
SSE
15
SE
Wind State
on
on
on
on
cross-on
cross-on
on
on
on
on
on
glassy
glassy
cross-on
on
cross-on
on
on
on
cross-on
cross-on
High Tide
6:46PM1.31m
7:09AM1.11m
7:27PM1.17m
8:02AM1.00m
8:28PM1.05m
Low Tide
12:28PM0.38m
1:07AM0.43m
1:04PM0.51m
1:53AM0.55m
1:53PM0.63m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:16
6:17
 mm
Temp °C
15
15
14
14
13
12
12
12
14
15
14
14
14
14
14
13
15
15
14
13
13
Feels °C
13
11
10
11
11
11
11
10
11
12
11
13
13
13
13
12
13
12
11
10
10
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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