Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 am 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.0°C
0.5° 

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 (16 Sep):

  • Morning surf: Morning surf (16 Sep, local time) - 11ft (3.5m), 10s period with S swell.
  • Afternoon surf: Afternoon surf (16 Sep, local time) - 11ft (3.5m), 10s period with S swell.
  • Evening surf: Evening surf (16 Sep, local time) - 11ft (3.5m), 10s period with S swell.

The current surf forecast for Backdoor 4 at 1PM is: 3.5m 10s primary swell from a South direction and 0.2m 12s secondary swell from a East-northeast direction, 0.1m 15s secondary swell from a East direction (forecast issued at 09:00am September 16). The wind direction is predicted to be offshore and the swell rating is 11.

Time (AEST) & DateWave HeightWave Period
Morning (16 Sep)11ft (3.5m)10s
Afternoon (16 Sep)11ft (3.5m)10s
Evening (16 Sep)11ft (3.5m)10s

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


Short Range Forecast

Mostly dry. Very mild (max 18°C on Fri morning, min 10°C on Wed night). Winds decreasing (strong winds from the S on Wed afternoon, calm by Fri morning).

Wednesday
16
Thursday
17
Friday
18
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)
!
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!
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!
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2
2
1
1
2
2
0
1
2
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
9
3.5
S
10
3.5
S
10
3.5
S
10
3.5
S
10
3.5
S
10
3.5
S
11
3.5
S
11
3.5
S
10
3.5
S
10
3
S
10
2.4
SSE
9
2.2
SSE
9
2
SSE
9
1.8
SSE
9
1.7
SSE
9
1.4
S
9
1.4
S
9
1.4
S
10
1.4
S
10
1.3
S
10
1.2
S
10
Wave Graph
Metric surfscale
Energy kJ
1894
2095
2644
2738
2493
2692
3036
2930
2329
2186
1591
960
773
613
528
453
304
318
347
347
307
260
Wind (km/h)
35
SSW
35
SSW
40
SSW
40
SSW
40
S
35
S
35
S
25
SSW
25
SW
25
SSW
20
S
15
SSE
5
E
10
NW
10
WNW
10
WNW
10
WNW
5
NE
15
E
15
ENE
10
NNE
5
W
Wind State
cross-off
cross-off
off
off
off
off
off
cross-off
cross-off
cross-off
off
cross-off
cross
cross-on
cross
cross
cross
glassy
cross
cross-on
cross-on
cross-off
High Tide
11:13AM1.40m
11:39PM1.01m
11:59AM1.34m
00:34AM0.92m
12:54PM1.27m
Low Tide
4:42AM0.37m
5:51PM0.39m
5:18AM0.46m
6:50PM0.46m
6:02AM0.53m
8:02PM0.50m
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
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>
5:52
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:45
5:45
 mm
Temp °C
13
12
13
14
15
14
14
12
10
12
14
14
13
13
13
12
12
16
18
17
17
17
Feels °C
4
4
4
5
5
5
6
6
4
6
9
11
12
11
11
10
10
14
14
13
15
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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