Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 am 17 Sep 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.3°C
0.2° 

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 (17 Sep):

  • Morning surf: Morning surf (17 Sep, local time) - 11ft (3.5m), 10s period with S swell.
  • Afternoon surf: Afternoon surf (17 Sep, local time) - 10ft (3.0m), 10s period with S swell.
  • Evening surf: Evening surf (17 Sep, local time) - 7ft (2.1m), 9s period with SSE swell.

The current surf forecast for Backdoor 4 at 12PM is: 3.0m 10s primary swell from a South direction and 0.1m 19s secondary swell from a South direction (forecast issued at 09:00am September 17). The wind direction is predicted to be offshore and the swell rating is 11.

Time (AEST) & DateWave HeightWave Period
Morning (17 Sep)11ft (3.5m)10s
Afternoon (17 Sep)10ft (3.0m)10s
Evening (17 Sep)7ft (2.1m)9s

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


Short Range Forecast

Mostly dry. Warm (max 27°C on Sat afternoon, min 11°C on Thu morning). Wind will be generally light.

Thursday
17
Friday
18
Saturday
19
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)
!
!
!
!
!
2
1
1
1
1
0
0
1
1
0
0
0
1
1
0
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)
3.5
S
10
3.5
S
10
2.5
S
10
2.5
SSE
9
2.2
SSE
9
2
SSE
9
1.8
SSE
9
1.7
SSE
8
1.6
SSE
8
1.2
S
9
1.3
S
9
1.3
S
9
1.2
S
9
1.1
S
9
0.6
S
16
0.6
S
16
0.6
S
17
0.5
S
17
0.8
S
10
0.7
S
9
0.7
S
9
0.6
S
9
Wave Graph
Metric surfscale
Energy kJ
2486
2153
1374
1019
757
600
466
398
346
209
268
280
249
211
188
192
209
140
115
80
80
61
Wind (km/h)
25
SW
20
SW
25
S
15
SSE
5
ESE
10
NW
10
WNW
10
WNW
10
WNW
5
NNE
15
E
20
ENE
10
NNE
15
W
15
W
20
W
20
W
10
W
10
E
10
NE
5
W
10
WSW
Wind State
cross-off
cross-off
off
cross-off
cross-off
cross-on
cross
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross-on
glassy
cross-off
High Tide
11:59AM1.34m
00:34AM0.92m
12:54PM1.27m
1:48AM0.86m
2:04PM1.24m
Low Tide
5:18AM0.46m
6:50PM0.46m
6:02AM0.53m
8:02PM0.50m
7:03AM0.59m
9:21PM0.50m
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:45
5:46
 mm
Temp °C
11
11
14
14
14
14
13
12
12
15
18
17
17
18
17
16
16
22
26
27
26
24
Feels °C
5
6
9
10
13
12
11
10
10
13
13
13
16
15
12
11
11
18
22
23
23
21
  • 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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