Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.3°C
0.1° 

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 (11 Sep):

  • Morning surf: Morning surf (11 Sep, local time) - 6ft (1.9m), 10s period with S swell.
  • Afternoon surf: Afternoon surf (11 Sep, local time) - 5.5ft (1.7m), 10s period with S swell.
  • Evening surf: Evening surf (11 Sep, local time) - 5ft (1.5m), 10s period with S swell.

The current surf forecast for Backdoor 4 at 1AM is: 2.2m 10s primary swell from a South direction and 0.2m 22s secondary swell from a South-southeast direction (forecast issued at 09:00pm September 10). The wind direction is predicted to be cross-offshore and the swell rating is 11.

Time (AEST) & DateWave HeightWave Period
Morning (11 Sep)6ft (1.9m)10s
Afternoon (11 Sep)5.5ft (1.7m)10s
Evening (11 Sep)5ft (1.5m)10s

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


Short Range Forecast

Mostly dry. Very mild (max 18°C on Sun afternoon, min 13°C on Thu night). Winds increasing (calm on Fri night, fresh winds from the NE by Sun afternoon).

Thu
10
Friday
11
Saturday
12
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)
!
!
!
!
3
3
3
3
2
2
2
2
3
3
3
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
S
10
2.3
S
10
2.2
S
10
2.1
S
10
2
S
10
1.9
S
10
1.8
S
10
1.6
S
10
1.5
S
10
1.5
S
10
1.4
S
10
1.3
S
10
1.3
S
10
1.3
S
12
1.2
S
12
1.2
S
11
1.1
S
11
1.1
S
10
Wave Graph
Metric surfscale
Energy kJ
1252
1055
947
890
792
701
618
499
432
432
377
326
326
480
411
364
274
254
Wind (km/h)
20
S
15
SSW
15
SW
15
SW
15
SW
10
SW
10
S
15
SSE
10
SE
5
SSE
10
SW
10
WSW
10
SW
5
SSE
10
ESE
15
ENE
20
NE
15
NNE
Wind State
off
off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
glassy
cross-off
cross-off
cross-off
glassy
cross-off
cross
cross-on
on
High Tide
7:31PM1.65m
8:07AM1.40m
8:14PM1.59m
8:44AM1.46m
8:54PM1.50m
Low Tide
2:00AM0.03m
2:01PM0.17m
2:35AM0.06m
2:47PM0.17m
clear
clear
part cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:42
5:42
 mm
Temp °C
15
15
14
13
13
14
15
16
16
16
16
14
14
15
16
17
17
16
Feels °C
11
12
11
10
10
12
13
13
14
16
15
12
12
15
14
14
14
14
  • 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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