Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 3 pm 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.5°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 (20 Sep):

  • 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 8PM is: 0.6m 18s primary swell from a South direction and 0.6m 4s secondary swell from a Northeast direction, 0.9m 4s secondary swell from a North-northeast direction (forecast issued at 03:00pm September 20). The wind direction is predicted to be cross-shore.

Time (AEST) & DateWave HeightWave Period
Morning (20 Sep)--
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 9mm), mostly falling on Tue night. Warm (max 29°C on Mon morning, min 14°C on Mon night). Winds decreasing (fresh winds from the SSE on Mon morning, light winds from the E by Tue afternoon).

Sun
20
Monday
21
Tuesday
22
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
1
1
0
0
0
0
0
0
1
!
!
!
2
2
3
2
1
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)
0.8
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
1.2
S
11
0.1
E
11
1.9
SSE
7
2.3
S
8
2.5
S
10
2.4
S
10
2
S
9
1.6
SSE
9
1.6
SE
8
1.4
S
10
1.3
S
10
1.2
S
10
Wave Graph
Metric surfscale
Energy kJ
130
167
225
220
153
143
82
110
350
2
342
754
1520
1147
679
394
314
424
325
266
Wind (km/h)
15
ENE
25
NE
15
W
15
WNW
15
NW
15
NW
15
NW
15
WNW
35
SSE
35
SSE
30
S
25
SSE
25
SSE
20
SSE
20
SSE
15
SE
10
SE
5
E
10
ENE
15
NE
Wind State
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
High Tide
3:16PM1.25m
4:27AM0.92m
4:18PM1.29m
5:17AM1.00m
5:08PM1.36m
Low Tide
10:27PM0.45m
9:41AM0.59m
11:15PM0.38m
10:43AM0.53m
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:47
5:47
5:49
 mm
1
2
Temp °C
27
26
28
26
23
21
22
29
16
16
15
14
14
14
15
15
15
16
15
16
Feels °C
22
20
23
21
18
16
17
24
10
11
9
9
9
9
11
12
14
16
15
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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