Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 am 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.4° C
0.9° 

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 (20 Aug):

  • Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.7m), 8s period with SE swell.
  • Afternoon surf: Afternoon surf (20 Aug, local time) - 3.5ft (1.0m), 6s period with ENE swell.
  • Evening surf: Evening surf (20 Aug, local time) - 4.5ft (1.3m), 6s period with ENE swell.

The current surf forecast for Backdoor 4 at 3PM is: 1.0m 6s primary swell from a East-northeast direction and 0.5m 7s secondary swell from a Southeast direction, 0.2m 10s secondary swell from a East direction (forecast issued at 09:00am August 20). The wind direction is predicted to be cross-onshore.

Time (AEST) & DateWave HeightWave Period
Morning (20 Aug)2.5ft (0.7m)8s
Afternoon (20 Aug)3.5ft (1.0m)6s
Evening (20 Aug)4.5ft (1.3m)6s

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


Short Range Forecast

Mostly dry. Warm (max 21°C on Thu morning, min 13°C on Sat night). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
0.7
SE
8
0.7
SE
8
0.8
ENE
6
1.1
ENE
6
1.4
ENE
6
1.6
NE
6
1.1
ENE
6
1
ENE
6
0.9
ENE
6
0.8
ENE
6
0.7
ENE
6
0.5
ENE
6
0.4
ENE
6
0.4
ENE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
0.4
NE
6
Wave Graph
Metric surfscale
Energy kJ
65
65
41
80
145
184
93
78
57
44
34
21
15
14
9
9
9
9
9
9
12
12
Wind (km/h)
10
NNW
15
N
20
NE
25
NE
20
NNE
10
NNW
10
NNW
10
NW
10
WNW
10
NNW
20
NW
25
NW
25
NW
20
NW
20
NW
15
NW
5
W
5
WNW
15
E
15
ESE
5
E
5
SSW
Wind State
cross-on
on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross
off
High Tide
1:49PM1.28m
2:17AM0.88m
2:54PM1.27m
3:41AM0.86m
4:01PM1.29m
Low Tide
6:53AM0.47m
8:46PM0.53m
7:49AM0.53m
10:05PM0.51m
8:59AM0.56m
clear
clear
part cloud
cloud
cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:27
5:28
5:29
 mm
Temp °C
14
16
21
19
20
19
18
17
16
17
19
18
17
16
16
15
15
17
18
17
16
16
Feels °C
12
13
16
13
16
16
15
15
14
15
15
13
12
12
13
13
14
16
15
15
15
15
  • 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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