Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 9 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
17.7° C
0.7° 

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 11 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 4PM (local time) - 7ft (2.1m), 7s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 7PM (local time) - 6ft (1.8m), 11s period, S swell with 723 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 1PM (local time) - 4.5ft (1.4m), 8s 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 Thursday (Aug 13) at 1PM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 1.2m and 8s. Another secondary swell of 0.4m and 9s is also forecast. 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 1.8m 11s and forecast to arrive on Tuesday (Aug 11) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Thursday (Aug 13) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Thu 13th Aug)4.5ft (1.4m) 8s
Best Surf 4PM (Sat 15th Aug)7ft (2.1m) 7s
Most Powerful 7PM (Tue 11th Aug)6ft (1.8m) 11s

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


The Lowdown

G’day, Rusty here. Let’s scan the next sixteen days for this part of the coast. The surf will start quiet for a day or two, then start rollin’.

Water temp is about 64° right now, which is 1° cooler than normal for this time of year – so nothing too crazy, just a touch on the cool side.

Our spot is Backdoor 4. It’s a reef break that breaks very consistently, and it loves an east swell best. It can get a crowd sometimes.

On Tuesday the 11th, Tuesday afternoon, there is some action: a 5ft south swell at 11 seconds, with strong energy (640). The wind is a light cross-shore from the WNW – a little bumpy, but surfable. Marginal but might get a couple.

Wednesday and Thursday morning are poor. But Thursday afternoon is the first real standout. A clean 7ft south swell, period 9 seconds, and massive energy (1095). The wind is a clean cross-off from the SE. This is powerful, heavy surf for the experienced crew. Too big for beginners.

Friday the 14th morning is a treat: glassy calm, 4ft south swell (239 energy). Clean, lined-up conditions – perfect for a quiet session. Crowds possible.

Saturday 15th afternoon: a 7ft south swell (536 energy) with a fresh offshore south wind blowing 19 mph. The report says it is too big for this reef, which makes sense – experts only here.

Sunday 16th through Wednesday 19th is mostly clean but not doing much exciting.

Friday the 21st morning goes glassy again. Calm wind, 3ft east swell at 9 seconds (212 energy). Nice clean fun-size waves.

Saturday 22nd morning is messy cross-shore, but the afternoon sees a fresh offshore south wind at 22 mph with a 4ft east-northeast swell (302 energy). It will be clean, but not huge.

Now Sunday the 23rd morning – this is a big one: a 6ft east-northeast swell, 10 seconds, and energy through the roof at 1207. The wind is a moderate cross-off from the SW. That is serious clean power. Again, only for the well-experienced.

Tuesday 25th afternoon: clean moderate offshore south wind at 12 mph, 7ft south swell (727 energy), period 9 seconds. Very good conditions, same deal – big for most.

Wednesday 26th is small, just 4ft south swell, light cross-off, nothing special.

The best bets: Thursday 13th afternoon’s 7ft south swell with clean cross-off wind, and Sunday 23rd morning’s 6ft east-northeast swell with clean wind and massive energy. Both are for expert surfers. Get out there if you’ve got the skills.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Tue morning, min 12°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 13mm), heaviest on Fri night. Very mild (max 16°C on Sun night, min 13°C on Fri morning). Winds increasing (calm on Fri morning, fresh winds from the SE by Sun morning).

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
2
1
0
1
0
0
4
2
2
1
2
2
!
1
1
0
!
!
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)
0.7
ENE
9
1.5
S
11
1.6
S
11
1.3
S
10
1
S
9
0.9
S
8
0.5
ENE
10
2
S
9
1.3
S
8
1.1
S
9
1.1
S
8
1.2
S
8
1.6
S
7
2.1
S
7
1.5
S
7
1.5
SSE
6
1.8
SSE
7
2.1
SE
7
2.1
SE
8
2
SE
8
2
ESE
8
Wave Graph
Metric surfscale
Energy kJ
76
563
606
333
164
111
52
651
208
202
165
168
226
483
226
167
306
452
539
465
464
Wind (km/h)
25
W
15
WNW
25
W
20
WNW
10
WNW
20
W
20
SSW
15
SE
15
SW
0
W
15
SE
10
SSW
25
S
30
S
20
SSE
25
SE
25
SE
20
ESE
25
ESE
25
ESE
15
ESE
Wind State
cross
cross
cross
cross
cross-on
cross
cross-off
cross-off
cross-off
glassy
cross-off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
7:02PM1.78m
7:49AM1.20m
7:50PM1.80m
8:34AM1.27m
8:36PM1.77m
9:17AM1.32m
9:19PM1.68m
9:58AM1.36m
10:01PM1.55m
10:39AM1.38m
10:43PM1.39m
11:21AM1.37m
11:25PM1.23m
Low Tide
12:29PM0.27m
1:50AM-0.00m
1:22PM0.22m
2:33AM-0.03m
2:12PM0.19m
3:13AM-0.02m
3:01PM0.20m
3:50AM0.03m
3:50PM0.23m
4:26AM0.10m
4:39PM0.29m
5:00AM0.19m
5:30PM0.36m
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
rain showers
rain showers
clear
rain showers
rain showers
rain showers
rain showers
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:35
6:33
6:33
6:31
6:31
6:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:21
5:22
5:22
5:22
5:23
5:23
5:24
 mm
1
2
3
2
1
4
2
Temp °C
20
20
14
18
19
14
15
15
15
14
15
15
15
15
15
15
15
16
16
16
16
Feels °C
16
16
8
13
16
9
12
12
13
11
11
13
10
9
12
9
9
11
11
11
11
  • 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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