Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 9 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.3° C
0.9° 

Backdoor 4 surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Backdoor 4 surf forecast from 17 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 1AM (local time) - 2.5ft (0.7m), 11s period, ESE swell with glassy winds.
  • Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 4ft (1.2m), 10s period, ESE swell with 248 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 7PM (local time) - 3.5ft (1.0m), 7s period with ESE swell.

Best Forecast Surf Conditions for Backdoor 4 this week:

The surf forecast for Backdoor 4 over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 7PM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.7m and 9s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Backdoor 4 in the next 16 days are 1.2m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 8s period and expected on Sunday (Aug 23) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Mon 17th Aug)3.5ft (1.0m) 7s
Best Surf 1AM (Wed 19th Aug)2.5ft (0.7m) 11s
Most Powerful 4PM (Wed 19th Aug)4ft (1.2m) 10s

Table - best surf conditions forecast for Backdoor 4 over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at what’s cooking for the next couple of weeks.

Alright, straight up, this is a lean run for Backdoor 4. For the first several days, we’ve got waves, but they’re pretty average, and the conditions just aren’t cooperating. There is no real standout in the first week, but there are a couple of days that could be worth a paddle if you’re keen.

The first real chance to get wet comes on Monday, the 17th of August. It’s not big, with waves around 4ft to 4ft coming from the ESE, but the wind is light and cross-offshore. The water is sitting at 63°, which is about normal for this time of year. The energy is moderate (248, 209), so there’s some push. It’s just average, but you could snag a few clean ones.

Tuesday the 18th is a write-off with stronger cross-shore wind chopping things up. Wednesday the 19th morning is a tease – glassy conditions with a long period groundswell (10 seconds) but only 2ft of wave. That long period means longer waits between sets, but the shape could be okay if you’re patient. The energy is moderate (163).

Then we hit a flat spell from Thursday the 20th all the way through to Sunday the 23rd of August. Wave heights drop to under 3ft and the energy is weak (19 to 111). Not much point suiting up.

We get a little pulse on Monday the 24th of August afternoon, with a 2ft South swell and clean cross-off wind, but the energy is only moderate (177). Still not really worth the hype.

Tuesday the 25th of August sees a jump in size with a 5ft South swell, but the wind is cranking at 18 mph. It's cross-offshore, so it’s clean, but that’s a lot of breeze. The energy is strong (353), but it’s more of a windy battle than great surf. Wednesday the 26th of August morning has a big jump in energy (499) with a 4ft South swell and a long 11-second period, but the cross-offshore wind is still fresh at 18 mph. That afternoon, a 6ft swell from the ENE appears, but the period is short (6 seconds), so it’s going to be lumpy and weak despite the moderate offshore wind.

Now, Thursday the 27th of August is the first real standout. The morning is clean with a gentle cross-off breeze, a 5ft NE swell, and the energy is pumping (565). That’s strong wave energy. The swell direction is coming from the NE, which isn’t the absolute optimum E, but it’s close enough and the conditions are clean. This is the best of the first two weeks. The afternoon is also good for a session with a 4ft ENE swell and light cross-off wind. This is a solid day.

After that, it gets messy again. Friday the 28th and Saturday the 29th of August are mostly poor, with onshore winds and small, weak swell.

But wait – the last real standout is Sunday the 30th of August. The morning is looking prime. A clean, light offshore wind from the SSE, and a 7ft South swell rolling in with a 10-second period. The energy is very strong (817). That is a proper swell. The wind is light offshore, so the waves should be clean and lined up. That’s a big day, but at 7ft it’s getting solid, so it’s better for intermediate to experienced surfers. The afternoon gets a bit messy with cross-shore wind and the swell dropping to 5ft.

The last couple of days into September are back to small and weak.

So, to wrap it up: the best of the bunch is without a doubt Thursday the 27th of August morning. It’s got size, clean wind, and strong energy. The second real standout, and the biggest swell of the period, is Sunday the 30th of August morning. That’s a powerful South swell with light offshore wind – one for the crew who can handle it.

Keep an eye on the sky, because these longer-range ones can change.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Mon morning. Very mild (max 16°C on Mon morning, min 14°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Fri night. Warm (max 21°C on Thu morning, min 13°C on Sat night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
0
0
1
2
1
0
0
0
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
Wave
Height (m)
Direction
Period (s)
1.2
ESE
7
1.1
ESE
7
1.2
ESE
7
1.2
ESE
7
1.1
ESE
7
0.7
ESE
11
0.7
ESE
10
1.2
ESE
10
0.8
SE
9
0.9
ESE
7
0.9
E
6
0.8
E
6
0.7
E
6
0.5
ENE
6
0.4
ENE
6
0.4
ENE
6
0.4
ENE
6
0.4
NE
6
0.3
S
16
0.3
S
14
0.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
132
105
139
128
118
116
90
248
93
77
67
49
38
20
14
15
15
10
44
34
27
Wind (km/h)
10
ESE
15
ESE
15
E
15
E
15
E
5
NE
0
S
20
ENE
10
N
10
N
15
NNE
10
WNW
5
SSW
0
S
15
NNW
10
SW
20
SE
5
WNW
5
NNE
25
NE
10
WNW
Wind State
cross-off
cross-off
cross
cross
cross
glassy
glassy
cross-on
on
on
cross-on
cross-on
glassy
glassy
cross-on
cross-off
cross-off
cross-on
cross-on
cross-on
cross-on
High Tide
11:21AM1.37m
11:25PM1.23m
12:04PM1.35m
00:11AM1.08m
12:52PM1.32m
1:05AM0.96m
1:49PM1.28m
2:17AM0.88m
2:54PM1.27m
3:41AM0.86m
4:01PM1.29m
4:54AM0.89m
4:58PM1.35m
Low Tide
5:30PM0.36m
5:34AM0.29m
6:25PM0.44m
6:11AM0.39m
7:30PM0.50m
6:53AM0.47m
8:46PM0.53m
7:49AM0.53m
10:05PM0.51m
8:59AM0.56m
11:10PM0.46m
10:09AM0.54m
11:58PM0.39m
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
rain showers
clear
clear
clear
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:30
6:28
6:28
6:26
6:26
6:24
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:24
5:25
5:27
5:27
5:28
5:29
5:29
 mm
1
3
Temp °C
16
16
16
16
16
16
15
16
16
21
21
20
18
17
15
17
16
16
16
19
18
Feels °C
14
13
13
12
13
15
13
14
13
16
18
18
17
17
13
13
12
16
13
16
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 
submit an eyeball surf report

Quick surf report for Backdoor 4:

join our community of surf reporters

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.


Information about the Backdoor 4 Surf forecast

The above surf forecast table for Backdoor 4 provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Backdoor 4 can be found by selecting the local surf guide option on the grey menu. Our Backdoor 4 surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Backdoor 4) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Backdoor 4 may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Backdoor 4 is 14 km (9 miles) from the city of Catherine Hill Bay. If you plan a holiday in Newcastle, look for hotels and other accommodation in Catherine Hill Bay. Catherine Hill Bay has rooms for a wide range of budgets as well as car hire and transport links.

Nearest locationNearest