Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 3 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) - 8ft (2.5m), 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 6AM is: 3.5m 10s primary swell from a South direction and 0.1m 13s secondary swell from a East direction, 0.1m 18s secondary swell from a South direction (forecast issued at 03:00am September 17). The wind direction is predicted to be cross-offshore and the swell rating is 11.

Time (AEST) & DateWave HeightWave Period
Morning (17 Sep)11ft (3.5m)10s
Afternoon (17 Sep)8ft (2.5m)10s
Evening (17 Sep)7ft (2.1m)9s

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


Short Range Forecast

Some drizzle, heaviest during Thu morning. Warm (max 27°C on Sat afternoon, min 11°C on Thu morning). Wind will be generally light.

Thursday
17
Friday
18
Saturday
19
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
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
!
!
!
!
!
!
!
!
2
1
1
2
0
0
0
1
0
0
0
1
1
0
0
1
Swell
Height Map
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
11
3.5
S
11
3.5
S
10
3.5
S
10
2.5
S
10
2.5
SSE
9
2.2
SSE
9
2.1
SSE
9
1.9
SSE
9
1.8
SSE
8
1.7
SSE
8
1.3
S
9
1.3
S
9
1.3
S
9
1.3
S
10
1.2
S
9
0.6
S
16
0.6
S
16
0.6
S
17
0.5
S
17
0.5
S
15
0.7
S
9
0.7
S
9
0.6
S
9
Wave Graph
Metric surfscale
Energy kJ
3036
3001
2582
2143
1374
1279
757
660
518
445
389
245
268
287
299
251
185
192
209
142
113
81
80
61
Wind (km/h)
35
S
30
SSW
25
SW
20
SW
20
SSW
15
SSE
5
ESE
10
WNW
10
WNW
10
WNW
10
WNW
5
NE
15
E
20
ENE
10
NNE
15
W
15
W
20
W
20
W
10
W
10
E
10
ENE
5
W
10
W
Wind State
off
off
cross-off
cross-off
off
cross-off
cross-off
cross-on
cross
cross-on
cross
glassy
cross
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
High Tide
11:39PM1.01m
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
part cloud
cloud
cloud
light rain
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
1
Temp °C
14
13
10
11
14
14
14
14
13
12
12
15
17
17
17
17
17
16
16
22
26
27
25
23
Feels °C
6
6
4
6
9
11
13
12
11
10
10
13
13
13
15
14
13
11
11
18
22
23
22
19
  • 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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