Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 3 pm 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.1° C
0.3° 

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 31 Jul 2026:

  • Best quality surf: Saturday 1 Aug, 7AM (local time) - 5.5ft (1.7m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 2 Aug, 4AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with 1,127 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 7AM (local time) - 5.5ft (1.7m), 10s 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 Saturday (Aug 01) at 7AM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.2m and 7s. 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 1.7m 14s and forecast to arrive on Sunday (Aug 02) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Wednesday (Aug 05) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Sat 1st Aug)5.5ft (1.7m) 10s
Best Surf 7AM (Sat 1st Aug)5.5ft (1.7m) 10s
Most Powerful 4AM (Sun 2nd Aug)5.5ft (1.7m) 14s

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


The Lowdown

Alright folks, Rusty here, checking in on what’s cooking for your local stretch. We’ve got a pretty tidy run of waves coming up with a solid mix of conditions, so let’s get into it.

The surf kicks off on Friday, July 31st with a decent pulse of swell from the south pushing through Backdoor 4. We’re looking at a clean 6 ft of south swell, with a moderate offshore breeze from the south that’s going to keep the faces smooth. The water sits at a well-and-truly normal 65°, nothing out of the ordinary for this time of year. The combined energy of all swells is moderate at 668, so there’s a good bit of push behind it. This is easily the standout of the whole outlook – a very consistent reef break that handles an east swell best, but this south groundswell is packing enough punch to make for some proper long, walling waves. Expect it to be a bit busy though, crowds are possible here.

Moving into Saturday, August 1st, we see the swell dropping a touch to 5-5 ft, but the wind shifts to a light cross-offshore from the west-southwest and then east-southeast. It stays clean with moderate energy (456 and 399). Good fun, but nothing that’ll get the heart racing like Friday.

Sunday, August 2nd gets a little trickier. The swell bumps up in period to 12-13 seconds, which is proper long-period groundswell, and the energy jumps right up to 875. But the wind goes onshore from the north in the morning, then turns into a strong cross-onshore from the northeast by the afternoon. That’ll chop it up something shocking. The morning’s a gamble at best. Don’t get too excited.

We then hit a solid dry spell. From Monday, August 3rd right through to late Tuesday, August 11th, it’s pretty bleak. The swell drops way down, with days of tiny waves and mostly onshore or cross-shore winds. The vibe is flat and messy. There’s a brief flicker of hope on Wednesday, August 5th afternoon with a clean 4 ft from the south, and another on Thursday, August 6th morning with 5 ft and glassy conditions – a total calm with zero wind, the water will be like a mirror. Those are worth a paddle if you’re desperate, but the quality isn’t up there with the opener.

After that big gap, the surf tries to find its feet again on Friday, August 14th. We get a clean morning with 4 ft of south swell, light winds, and a moderate 225 energy score. It’s surfable, but it’s a far cry from the 31st.

So, to sum it up: if you want the best waves of the whole 16-day window, you’ve got to be in the water on Friday, July 31st. After that, it’s a lot of waiting, a few so-so days, and a whole lot of flat spells. Keep an eye on that Friday morning session on the 6th for a chance at a glassy ride.

Stay stoked.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Mon morning, min 11°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 19°C on Mon afternoon, min 9°C on Tue night). Wind will be generally light.

Fri
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
2
2
2
0
1
0
0
0
0
0
0
1
2
2
2
2
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
10
1.8
S
10
1.6
SSE
9
1.5
SSE
9
1.3
SSE
9
1.6
SSE
12
1.6
SSE
13
1.3
SSE
12
1
SE
11
0.9
SE
11
0.4
SSE
10
0.3
ESE
7
0.3
E
7
0.6
S
7
1
S
10
1.2
S
10
1.7
S
10
1.6
S
9
1.5
S
8
1.4
S
8
Wave Graph
Metric surfscale
Energy kJ
660
593
451
351
280
658
822
456
233
194
43
10
9
37
210
284
590
416
320
257
Wind (km/h)
20
S
15
WSW
10
WSW
5
ESE
10
NNE
10
N
25
NE
10
N
15
NNW
25
NW
15
W
15
W
10
SE
15
W
15
W
15
ESE
10
WNW
0
W
10
ESE
10
W
Wind State
off
cross-off
cross-off
cross-off
on
on
cross-on
on
on
cross-on
cross
cross
cross-off
cross
cross
cross-off
cross
glassy
cross-off
cross
High Tide
9:17PM1.58m
9:58AM1.20m
9:52PM1.53m
10:36AM1.25m
10:28PM1.45m
11:16AM1.29m
11:09PM1.35m
12:01PM1.32m
11:57PM1.24m
12:52PM1.35m
00:55AM1.12m
1:51PM1.39m
2:10AM1.03m
Low Tide
3:55AM0.13m
3:36PM0.35m
4:26AM0.13m
4:19PM0.37m
4:59AM0.15m
5:08PM0.40m
5:35AM0.19m
6:03PM0.43m
6:16AM0.25m
7:10PM0.45m
7:05AM0.31m
8:28PM0.44m
clear
part cloud
cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:45
6:43
6:43
6:41
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:14
5:14
5:15
5:15
5:15
5:16
5:17
 mm
Temp °C
15
15
13
15
15
15
16
16
20
19
16
17
17
12
16
15
15
13
15
14
Feels °C
10
11
12
13
12
11
11
12
16
13
12
13
13
6
13
11
14
11
12
13
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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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