Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 9 pm 16 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 16 Aug 2026:

  • Best quality surf: Monday 17 Aug, 1AM (local time) - 3ft (0.9m), 11s period, S swell with glassy winds.
  • Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 3.5ft (1.1m), 10s period, ESE swell with 210 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 1AM (local time) - 3ft (0.9m), 11s 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 Monday (Aug 17) at 1AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.9m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Backdoor 4 in the next 16 days are 1.1m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 10s period and expected on Monday (Aug 24) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Mon 17th Aug)3ft (0.9m) 11s
Best Surf 1AM (Mon 17th Aug)3ft (0.9m) 11s
Most Powerful 4PM (Wed 19th Aug)3.5ft (1.1m) 10s

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


The Lowdown

Alright, mates, Rusty here. Let’s be straight with you about the surf ahead. It’s going to be a real test of patience, especially right out of the gate.

We’re looking at a long, flat spell for our stretch of coast, and there’s basically nothing rideable for the first week. There’s a gap of several days with no recommendations at all. The swell window is just shut, and the odd pulse that does show up is riddled with short-period, cross-onshore junk. You’d be fighting a losing battle if you tried to make something of it. This is one of those times where you keep the board in the car and enjoy the beach.

Things finally start to look up, but it’s a slow burn. The first real glimmer of hope shows on Monday, August 25th. It's still not perfect, but we finally get some proper south in the water, with a couple of long-period pulses. The *Tuesday morning* window on the 25th catches an inconsistent 5ft of south swell with a 9-second period. The energy is moderate (365), but it’s crossed by a light westerly, which mucks up the surface a little. The *Tuesday afternoon* gets a better bump, with a 5ft south swell and a longer 11-second period. Energy ticks up to a solid 609, but the wind swings a bit more onshore. It’s all still a bit marginal.

The, we get a punch of wind on Wednesday, August 26th and Thursday, August 27th. The swell’s still pushing through, but it’s blowing a solid 19-22 mph from the west, which is just going to destroy the surface. It’s clean-up, messy surf. The conditions are too poor to recommend; you’d be wasting your time. The energy is strong, but it’s all for nothing with that wind.

Then, it settles down. Friday, August 28th is the standout of this whole stretch. The morning still has some cross-off wind, but the *afternoon* looks choice. We’ve got a 3ft south swell, an 11-second period, gentle offshore winds from the south, and clean conditions. The energy is moderate (201). It’s a classic, clean little reef wave in the making. This is the one to circle.

The final days of the forecast get small again. Saturday, August 29th has a brief northeast pulse that’s junked by a cross-onshore wind. From Sunday on, it’s back to tiny, poor surf. Nothing to get excited about.

As for the water, the temperature is about average for this time of year, so no shock waiting for you.

Alright, get out there on Friday arvo, and otherwise enjoy the time off.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon morning. Very mild (max 16°C on Sun night, min 14°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Fri night. Warm (max 20°C on Thu morning, min 13°C on Fri night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
0
0
2
1
1
1
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)
0.9
S
11
1.2
ESE
7
1.1
ESE
7
1.3
ESE
7
0.6
S
11
1.1
ESE
7
0.7
ESE
11
0.7
ESE
10
1.1
ESE
10
1
E
9
0.9
ESE
7
0.7
ESE
7
0.9
ENE
6
0.8
ENE
6
0.6
ENE
6
0.5
ENE
6
0.4
ENE
6
0.4
ENE
6
0.4
NE
6
Wave Graph
Metric surfscale
Energy kJ
189
132
113
141
85
115
116
90
210
162
75
41
68
53
30
22
15
16
10
Wind (km/h)
5
ESE
10
E
15
SE
15
E
15
E
15
ESE
5
NE
5
SSW
15
ENE
10
NNW
10
N
25
NE
10
W
0
S
10
WNW
15
NNW
10
SW
20
SSE
5
WSW
Wind State
glassy
cross
cross-off
cross
cross
cross-off
cross-on
glassy
cross
on
on
cross-on
cross
glassy
cross
cross-on
cross-off
cross-off
glassy
High Tide
10:43PM1.39m
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
Low Tide
5:00AM0.19m
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
clear
rain showers
part cloud
part cloud
light rain
part cloud
part cloud
clear
clear
clear
clear
cloud
part cloud
cloud
cloud
rain showers
clear
clear
rain showers
<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
<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
 mm
1
1
3
3
Temp °C
16
16
16
16
16
16
16
16
16
16
20
19
19
16
15
14
17
16
16
Feels °C
15
14
13
13
13
13
14
14
14
13
15
14
17
15
14
13
14
12
15
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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