Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 3 pm 16 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.4° C
0.1° 

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 16 Jul 2026:

  • Best quality surf: Sunday 19 Jul, 1PM (local time) - 6ft (1.9m), 11s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Sunday 19 Jul, 10AM (local time) - 6ft (1.9m), 11s period, ENE swell with 831 kJ wave energy.
  • Next surfable swell (1★+): Friday 17 Jul, 1AM (local time) - 4.5ft (1.3m), 7s period with S 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 Friday (Jul 17) at 1AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.3m and 8s. 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 1.9m 11s and forecast to arrive on Sunday (Jul 19) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Friday (Jul 17) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Fri 17th Jul)4.5ft (1.3m) 7s
Best Surf 1PM (Sun 19th Jul)6ft (1.9m) 11s
Most Powerful10AM (Sun 19th Jul)6ft (1.9m) 11s

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


The Lowdown

Right then, let’s have a look at what’s on offer for the next couple of weeks. We’re starting off with a bit of a slow patch, but there’s some real potential building towards the end.

The first few days are a bit of a write-off. Thursday the 16th and Friday the 17th have some small, short-period swell, but the wind is messy and cross-off, so it’s not really worth the paddle. We’re looking at a gap of a few days there before things start to get interesting.

Sunday the 19th is where we see the first real pulse of energy. The morning has a 6ft swell from the ENE with a solid 11-second period, and the combined energy is up there (1000). The wind is still cross-off, but it’s light. The afternoon cleans up nicely with the same size and a 10-second period. That’s when you want to be in the water.

Now, the real standout. Monday the 20th morning is an absolute gem. We’ve got a 6ft ENE groundswell, a 10-second period, and the wind is dead calm – glassy conditions. The water is sitting at 65°, which is bang on average for this time of year. This is the pick of the first week, no question. The combined energy is a solid 760, so there’s plenty of push. It’s a reef break and very consistent, so expect some crowds, but with conditions like that, it’ll be worth it. The swell direction is a touch east of the optimum, but it’ll still set up nicely.

We dip again mid-week. Tuesday through Thursday has some small, weak swell and onshore winds, so you can give that a miss.

Then we get a big, late surge. On Friday the 24th afternoon, a massive 10ft swell from the south with a very long 11-second period arrives. The combined energy is enormous (3105). The wind is offshore and light. However, this is going to be way too big for most, only for experts. The swell is too big for this break.

The real second-week highlight then comes on Thursday the 30th. The afternoon session is looking excellent. We’ve got a 6ft south swell, a 10-second period, and a gentle offshore wind. The combined energy is a strong 1124. This is a proper groundswell for experienced surfers, and the conditions will be clean and lined up. Friday the 31st morning also has a glassy 5ft swell, but the period drops to 8 seconds, so it’ll be a bit weaker.

So, to sum it up: Monday the 20th morning is your best early bet for clean, classic waves. But if you’re an experienced surfer, hold out for Thursday the 30th afternoon. That’s the big one.

Rusty.

Short Range Forecast

Moderate rain (total 13mm), heaviest on Thu afternoon. Very mild (max 17°C on Sat morning, min 15°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Wed morning, min 12°C on Mon night). Wind will be generally light.

Thu
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
2
1
1
1
1
1
3
3
3
3
1
1
2
0
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
S
8
1.3
S
7
0.9
S
7
1
E
8
1.2
ESE
6
1.3
ESE
7
1.3
ESE
7
1.4
E
8
1.9
ENE
11
1.9
ENE
10
1.9
E
10
1.7
ENE
10
1.6
ENE
10
1.6
ENE
10
1.5
ENE
10
1.4
ENE
10
1.4
ENE
10
1.2
ENE
9
1.1
ENE
9
1
ENE
9
Wave Graph
Metric surfscale
Energy kJ
453
183
81
111
107
141
186
273
831
815
770
610
533
512
433
356
358
232
197
180
Wind (km/h)
15
SE
15
ESE
10
SSE
15
SE
15
SSE
20
SSE
20
SE
15
SE
15
ESE
15
SE
5
NE
0
WNW
15
NE
10
N
5
NNW
15
ENE
10
NNW
5
NW
15
E
15
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-on
on
on
cross-on
on
cross-on
cross
cross
High Tide
9:42PM1.79m
10:32AM1.23m
10:29PM1.67m
11:20AM1.25m
11:15PM1.51m
12:09PM1.27m
00:01AM1.34m
12:59PM1.28m
00:51AM1.17m
1:51PM1.29m
1:47AM1.03m
2:45PM1.31m
2:53AM0.93m
Low Tide
4:28AM-0.02m
4:07PM0.28m
5:10AM0.04m
5:01PM0.35m
5:51AM0.13m
5:58PM0.42m
6:30AM0.22m
7:01PM0.48m
7:10AM0.31m
8:11PM0.53m
7:53AM0.39m
9:26PM0.53m
mod rain
rain showers
clear
clear
rain showers
part cloud
cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:52
6:52
6:52
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:04
5:05
5:05
5:06
5:06
5:07
5:07
 mm
6
6
1
Temp °C
16
16
16
16
16
17
17
17
16
16
15
14
16
15
14
16
15
18
19
16
Feels °C
13
15
14
13
13
13
13
13
12
14
13
13
14
12
12
13
13
17
17
13
  • 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