Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 9 pm 19 Sep 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.9°C
0.7° 

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 Sep):

  • Morning surf: Morning surf (20 Sep, local time) - 2.5ft (0.7m), 11s period with S swell.
  • Afternoon surf: Afternoon surf (20 Sep, local time) - 1.5ft (0.5m), 18s period with S swell.
  • Evening surf: Evening surf (20 Sep, local time) - 2ft (0.6m), 17s period with S swell.

The current surf forecast for Backdoor 4 at 3AM is: 0.5m 9s primary swell from a South direction and 0.2m 17s secondary swell from a South direction (forecast issued at 09:00pm September 19). The wind direction is predicted to be cross-shore.

Time (AEST) & DateWave HeightWave Period
Morning (20 Sep)2.5ft (0.7m)11s
Afternoon (20 Sep)1.5ft (0.5m)18s
Evening (20 Sep)2ft (0.6m)17s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Tue afternoon. Warm (max 29°C on Mon morning, min 14°C on Mon night). Winds decreasing (fresh winds from the S on Mon morning, calm by Tue afternoon).

Sat
19
Sunday
20
Monday
21
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
1
1
0
0
0
0
0
0
1
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
S
9
0.6
S
9
0.2
S
17
0.5
S
10
0.6
S
11
0.8
S
11
0.8
S
10
0.5
S
18
0.6
S
18
0.6
S
17
0.5
S
17
0.5
S
17
0.4
S
16
0.7
S
11
0.9
S
11
0.1
E
11
1.6
SSE
6
2.1
SSE
7
Wave Graph
Metric surfscale
Energy kJ
60
60
24
44
81
143
130
167
225
220
153
143
82
110
196
2
198
456
Wind (km/h)
10
NNW
10
W
10
W
10
WNW
10
WNW
10
NNE
15
NE
20
NE
15
W
15
WNW
15
NW
15
NW
15
NW
15
NW
35
S
30
S
30
SSE
25
SSE
Wind State
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
off
off
off
off
High Tide
3:16AM0.87m
3:16PM1.25m
4:27AM0.92m
4:18PM1.29m
Low Tide
9:21PM0.50m
8:23AM0.62m
10:27PM0.45m
9:41AM0.59m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:47
5:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:47
5:47
 mm
Temp °C
27
23
21
19
19
22
28
27
28
25
22
21
22
29
18
16
16
15
Feels °C
22
19
17
15
15
18
23
23
23
20
17
15
17
24
13
11
11
11
  • 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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