Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 3 pm 17 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):

  • Afternoon surf: Afternoon surf (18 Aug, local time) - 3.5ft (1.1m), 7s period with ESE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 4ft (1.2m), 7s period with ESE swell.

The current surf forecast for Backdoor 4 at 12AM is: 1.2m 7s primary swell from a East-southeast direction and 0.6m 8s secondary swell from a South direction, 0.3m 12s secondary swell from a South direction (forecast issued at 03:00pm August 17). The wind direction is predicted to be cross-shore.

Time (AEST) & DateWave HeightWave Period
Morning (18 Aug)--
Afternoon (18 Aug)3.5ft (1.1m)7s
Evening (18 Aug)4ft (1.2m)7s

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


Short Range Forecast

Mostly dry. Warm (max 20°C on Thu morning, min 14°C on Wed night). Wind will be generally light.

Mon
17
Tuesday
18
Wednesday
19
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)
2
2
0
0
0
1
1
0
1
1
1
1
1
2
1
1
0
0
0
0
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)
1.1
ESE
7
1.1
ESE
7
1
ESE
7
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1.2
ESE
7
1.1
ESE
7
1.1
ESE
7
1
ESE
8
0.7
ESE
11
0.7
ESE
11
0.9
ESE
8
0.7
ESE
10
0.9
ESE
7
1.2
ESE
10
1.1
ESE
9
0.9
SE
9
Wave Graph
Metric surfscale
Energy kJ
113
105
91
128
139
139
124
128
128
118
118
137
116
113
95
90
77
248
220
118
Wind (km/h)
15
ESE
15
ESE
15
E
15
E
20
E
15
E
10
E
15
E
15
E
15
E
10
ENE
15
E
5
ENE
5
NE
5
W
0
NW
10
ENE
20
ENE
25
NE
20
NNE
Wind State
cross-off
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
glassy
cross
glassy
cross
cross-on
cross-on
on
High Tide
11:21AM1.37m
11:25PM1.23m
12:04PM1.35m
00:11AM1.08m
12:52PM1.32m
Low Tide
5:30PM0.36m
5:34AM0.29m
6:25PM0.44m
6:11AM0.39m
7:30PM0.50m
part cloud
part cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
part cloud
clear
cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:24
5:25
5:27
 mm
Temp °C
16
16
16
16
16
16
16
16
16
16
16
16
15
15
15
15
16
16
16
16
Feels °C
13
14
13
13
12
13
13
12
13
13
14
14
14
15
15
16
14
12
12
13
  • 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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