Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.5° C
0.8° 

Backdoor 4 surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Backdoor 4 today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 4ft (1.2m), 7s period with ESE swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 4ft (1.2m), 7s period with ESE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 3.5ft (1.0m), 8s period with ESE swell.

The current surf forecast for Backdoor 4 at 12PM is: 1.2m 7s primary swell from a East-southeast direction and 0.6m 11s secondary swell from a South direction, 0.2m 14s secondary swell from a East-southeast direction (forecast issued at 09:00am August 18). The wind direction is predicted to be cross-shore.

Time (AEST) & DateWave HeightWave Period
Morning (18 Aug)4ft (1.2m)7s
Afternoon (18 Aug)4ft (1.2m)7s
Evening (18 Aug)3.5ft (1.0m)8s

Table - waves today at Backdoor 4. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 2mm), mostly falling on Tue night. Warm (max 20°C on Thu morning, min 14°C on Tue night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
1
0
0
0
1
0
1
2
0
2
0
0
0
0
0
0
0
0
0
0
0
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)
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1
ESE
7
1
ESE
8
1
ESE
8
0.9
ESE
8
0.7
ESE
10
0.7
ESE
10
0.9
ESE
7
1.2
ESE
10
1
ESE
9
0.8
ESE
9
0.8
SE
9
0.7
SE
9
0.7
SE
7
0.9
E
6
0.9
E
6
0.6
ESE
6
1.1
NE
5
1.3
ENE
6
Wave Graph
Metric surfscale
Energy kJ
124
124
128
132
111
137
140
110
95
94
77
248
164
103
95
77
47
66
66
31
51
108
Wind (km/h)
15
E
15
E
15
E
15
E
10
E
10
ENE
5
NE
0
NW
10
W
0
NNE
15
ENE
20
ENE
20
NE
20
NNE
20
N
10
NNW
10
NNW
10
NNE
20
NE
25
NE
15
N
10
WNW
Wind State
cross
cross
cross
cross
cross
cross-on
cross-on
glassy
cross
glassy
cross
cross-on
cross-on
on
on
on
cross-on
on
cross-on
cross-on
on
cross
High Tide
12:04PM1.35m
00:11AM1.08m
12:52PM1.32m
1:05AM0.96m
1:49PM1.28m
Low Tide
5:34AM0.29m
6:25PM0.44m
6:11AM0.39m
7:30PM0.50m
6:53AM0.47m
8:46PM0.53m
cloud
part cloud
part cloud
cloud
part cloud
rain showers
rain showers
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:25
5:27
5:27
 mm
1
1
Temp °C
16
16
16
16
16
16
15
15
14
15
16
16
16
16
15
14
14
16
20
20
20
19
Feels °C
13
12
12
12
14
14
14
15
13
15
14
13
13
13
12
12
12
13
15
15
17
16
  • 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 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Backdoor 4 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.


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