Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 48 hour detailed Surf Forecast

Issued: 3 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.7° C
0.4° 

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 (21 Jul):

  • Morning surf: Morning surf (21 Jul, local time) - 5ft (1.5m), 10s period with ENE swell.
  • Afternoon surf: Afternoon surf (21 Jul, local time) - 4.5ft (1.3m), 10s period with ENE swell.
  • Evening surf: Evening surf (21 Jul, local time) - 3.5ft (1.1m), 10s period with ENE swell.

The current surf forecast for Backdoor 4 at 7AM is: 1.5m 10s primary swell from a East-northeast direction and 0.6m 11s secondary swell from a South direction (forecast issued at 03:00am July 21). The wind direction is predicted to be cross-onshore.

Time (AEST) & DateWave HeightWave Period
Morning (21 Jul)5ft (1.5m)10s
Afternoon (21 Jul)4.5ft (1.3m)10s
Evening (21 Jul)3.5ft (1.1m)10s

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


Short Range Forecast

Mostly dry. Warm (max 20°C on Wed morning, min 8°C on Thu night). Winds increasing (light winds from the WSW on Wed morning, fresh winds from the WSW by Thu afternoon).

Tuesday
21
Wednesday
22
Thursday
23
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
2
2
1
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
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)
1.6
ENE
10
1.6
ENE
10
1.5
ENE
10
1.4
ENE
10
1.4
ENE
10
1.2
ENE
10
1.1
ENE
10
1.1
ENE
10
1
ENE
10
1.2
ENE
10
1.2
ENE
10
1.2
ENE
10
1.1
ENE
10
1
ENE
10
0.9
ENE
9
0.9
ENE
9
0.9
ENE
9
0.9
ENE
9
0.9
ENE
9
0.9
ENE
9
0.8
ENE
9
0.8
ENE
9
0.6
ENE
9
0.6
ENE
9
Wave Graph
Metric surfscale
Energy kJ
501
482
416
363
363
294
250
245
201
269
248
248
210
172
156
156
149
119
119
116
92
92
62
62
Wind (km/h)
10
NNW
10
NW
10
NW
10
N
15
NE
20
NE
20
NE
20
N
15
N
10
NW
10
NW
10
NW
5
WSW
15
E
10
WNW
20
W
20
W
20
W
15
W
15
WSW
10
W
15
WSW
30
WSW
25
WSW
Wind State
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-off
cross
cross
cross
cross
cross
cross
cross-off
cross
cross-off
cross-off
cross-off
High Tide
00:51AM1.17m
1:51PM1.29m
1:47AM1.03m
2:45PM1.31m
2:53AM0.93m
3:42PM1.32m
Low Tide
7:10AM0.31m
8:11PM0.53m
7:53AM0.39m
9:26PM0.53m
8:42AM0.45m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:52
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:07
5:07
5:07
 mm
Temp °C
13
12
12
13
15
15
16
15
14
12
12
14
20
18
19
17
16
14
13
15
19
19
15
12
Feels °C
11
10
11
12
12
12
13
12
12
10
9
11
17
14
16
13
12
10
9
11
15
14
7
5
  • 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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