Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 3 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.9° C
0.5° 

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 3 Aug 2026:

  • Best quality surf: Friday 7 Aug, 1PM (local time) - 2ft (0.6m), 10s period, SSE swell with offshore winds.
  • Most powerful swell: Monday 10 Aug, 1AM (local time) - 4ft (1.2m), 10s period, ENE swell with 248 kJ wave energy.
  • Next surfable swell (1★+): Friday 7 Aug, 1PM (local time) - 2ft (0.6m), 10s period with SSE 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 (Aug 07) at 1PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.6m and 9s. The wind is predicted to be 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 Monday (Aug 10) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Wednesday (Aug 05) at 1PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 7th Aug)2ft (0.6m) 10s
Best Surf 1PM (Fri 7th Aug)2ft (0.6m) 10s
Most Powerful 1AM (Mon 10th Aug)4ft (1.2m) 10s

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


The Lowdown

Alright, Rusty here, and I’m sizing up the local surf. Truth is, the first week and a half is a total bust. We’re looking at a long dry spell before things finally wake up.

Water temp is about 64°, which is pretty normal for late summer.

From Tuesday the 4th through the middle of the month, the surf is almost non-existent. Swell heights are under 3ft, with wave energy reading in the double digits, like 35 and 39, which is flat-out weak. The wind is a mess, switching from cross to cross-off, and even some strong breezes, but with no swell, it doesn’t matter. That’s a solid week-plus of nothing.

Then we get a dramatic spike. Around Thursday the 13th, the charts show a huge south swell hitting 13ft with a period of 11 seconds. The energy reading jumps to 4057, which is a massive amount of power. But here’s the thing: that’s way too big for Backdoor 4. It’s a shallow reef, and that much south swell will make it dangerous and unsurfable for most. The wind is good, but it’s a no-go unless you’re a pro with a death wish. The same goes for Friday the 14th, with 10ft and 8ft days. Experts only.

The one clear standout is Sunday the 16th. The morning shows a 6ft swell from the SE, 9-second period, with a solid offshore wind from the south at 12 mph. That’s clean, lined up, and fun. The energy is 506, which is a solid moderate level. The swell direction is perfect for the break. The afternoon drops to 5ft but stays offshore. This is the best window. Since it’s a very consistent reef, expect crowds, so plan your paddle out.

The following Monday the 17th and Tuesday the 18th keep some decent swell around – 6ft to 6ft from the ESE – but the wind gets a bit shiftier, and the periods are less consistent. The Tuesday afternoon session with a clean cross-off wind and a 6ft SE swell (599 energy) is a good backup option.

So, it’s a long wait for a short window, but that Sunday the 16th is the day to make it happen.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Tue morning, min 9°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Sun night. Very mild (max 19°C on Sun morning, min 10°C on Sat night). Winds increasing (light winds from the SW on Sat morning, fresh winds from the NNW by Sun night).

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
1
1
1
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)
0.4
SE
10
0.2
E
14
0.2
E
11
0.4
E
10
0.4
E
9
0.3
S
12
0.6
S
8
0.8
S
8
0.6
S
7
0.5
SSE
10
0.6
S
9
0.5
SSE
10
0.6
S
8
0.7
S
8
0.4
SSE
9
0.7
ENE
9
0.9
ENE
9
1.2
ENE
10
1
ENE
10
0.9
ENE
9
0.9
S
9
Wave Graph
Metric surfscale
Energy kJ
25
15
9
31
26
24
51
84
37
52
55
51
48
55
25
80
146
248
175
124
130
Wind (km/h)
10
W
10
SE
20
W
15
W
15
E
20
W
5
W
15
ENE
15
WNW
10
W
20
SSE
10
WSW
10
SW
10
ESE
15
N
15
N
15
NNW
30
WNW
30
WNW
20
WSW
25
W
Wind State
cross
cross-off
cross
cross
cross
cross-off
glassy
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
on
on
on
cross-on
cross
cross-off
cross
High Tide
12:01PM1.32m
11:57PM1.24m
12:52PM1.35m
00:55AM1.12m
1:51PM1.39m
2:10AM1.03m
2:58PM1.44m
3:35AM0.98m
4:07PM1.52m
4:56AM1.00m
5:11PM1.61m
6:03AM1.06m
6:09PM1.71m
Low Tide
6:03PM0.43m
6:16AM0.25m
7:10PM0.45m
7:05AM0.31m
8:28PM0.44m
8:05AM0.36m
9:51PM0.38m
9:15AM0.39m
11:06PM0.28m
10:26AM0.38m
00:08AM0.16m
11:31AM0.33m
1:02AM0.07m
clear
clear
clear
clear
clear
clear
clear
cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:41
6:39
6:39
6:37
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:15
5:16
5:17
5:17
5:19
5:20
5:20
 mm
1
Temp °C
17
16
13
16
16
13
13
14
13
16
15
15
14
15
14
19
19
17
16
18
13
Feels °C
14
12
8
13
12
7
10
10
8
11
10
12
12
13
11
13
15
11
9
13
8
  • Map Icons:
  • Break
  • 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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