Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 3 pm 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.8° C
0.6° 

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 18 Jul 2026:

  • Best quality surf: Sunday 19 Jul, 4AM (local time) - 7ft (2.2m), 11s period, E swell with cross-offshore winds.
  • Most powerful swell: Friday 24 Jul, 7AM (local time) - 10ft (3.0m), 11s period, S swell with 1,897 kJ wave energy.
  • Next surfable swell (1★+): Sunday 19 Jul, 4AM (local time) - 7ft (2.2m), 11s period with E 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 Sunday (Jul 19) at 4AM. The primary swell is predicted to be 2.2m and 11s period with a secondary swell of 0.4m and 9s. 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 3.0m 11s and forecast to arrive on Friday (Jul 24) at 7AM. Winds are predicted to be cross-offshore 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 (Jul 23) at 10AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sun 19th Jul)7ft (2.2m) 11s
Best Surf 4AM (Sun 19th Jul)7ft (2.2m) 11s
Most Powerful 7AM (Fri 24th Jul)10ft (3.0m) 11s

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


The Lowdown

Alright, Rusty here. Let’s talk about Backdoor 4.

We’ve got a solid run of surf ahead, but you gotta pick your moments. This is a reef break that’s very consistent, so it’ll be pumping more often than not. The water temp is sitting at 66°, which is about average for this time of year, so nothing weird going on there.

The first wave of action kicks off Saturday the 18th of July, but honestly, it’s a bit of a tease. We’ve got clean 4ft to 5ft swell from the ESE with a short period of 7 seconds—that’s a weak, choppy energy (228 on the scale). The wind is a cross-off from the SSE, so it’s not terrible, but the waves are just kind of average. We’ll get a few, but it’s not the best the week has to offer.

Now, Sunday the 19th is where things get interesting. The swell jumps up to 7ft from the east with a 11-second period. That’s a proper groundswell, and the energy rockets up to 1214. The wind is a clean cross-off from the SE, and the morning looks cloudy but clean. The only catch? This reef might be a bit too much for the average surfer at that size. It’s big, powerful, and the wave will be jacking up fast. For the experienced crew, this is a standout. The afternoon is pretty similar at 7ft, still clean, still a beast.

Monday morning the 20th is the real hidden gem. Swell drops to 6ft from the ENE, period 11 seconds, and the wind is glass. Absolutely dead calm. The energy is still solid at 863, and the wave comment says "expect very good surf conditions." This is the best window for the average surfer who wants a proper barrel without getting pounded. The afternoon goes cross-on and gets a bit bumpy, so hit the morning.

After that, Tuesday through Thursday morning the 23rd is a bit of a letdown. Swell drops off, periods get short, and the energy craters. It’s small, weak, and not really worth the paddle. Hang tight.

Thursday afternoon the 23rd changes the game again. A new 10ft S swell slams in with a short 8-second period, but the energy is a huge 1359. The wind is a fresh offshore from the south at 19 mph, so it’ll be clean. But let’s be real—10ft on a reef is expert territory. This is for the big-wave chargers only. Friday the 24th is still massive in the morning at 8ft from the south, period 10 seconds, energy 2333, and clean. Another one for the pros.

Saturday the 25th of July is a beauty for the rest of us. The swell drops to 4ft from the south, period 10 seconds, and the wind goes glass in the morning. Energy is 484, and it’s looking clean and fun. The afternoon is a bit smaller but still surfable. This is a solid day for the intermediate surfer.

The end of July and into August gets messy. We have some strong winds and rain, and the swell bounces around from 7ft down to 2ft. The periods are short, and the energy is moderate. There is a moment on Monday the 27th afternoon where the wind goes offshore and the swell is 4ft with a 11-second period—that’s clean and workable, but nothing special.

Saturday the 1st of August is a weird one. Morning is flat with a tiny 0.7ft swell, but the afternoon bombs out at 10ft from the ENE with a short period—that’s messy and probably just a close-out.

The best bet for the second week is Sunday the 2nd of August. Morning swell is 6ft from the ENE, period 10 seconds, energy 699, and the wind is a slight air from the SW. The wave comment says "expect very good surf conditions." This is a solid, clean wave that should offer some fun barrels for the good surfers. It’s a week and a half out, so keep an eye on it, but it’s promising.

Standout moments: Sunday the 19th for the big-wave crew, and Monday morning the 20th for the clean, glassy, manageable size. For the second week, Sunday the 2nd of August is the one to watch.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Sat afternoon, min 12°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Thu night. Very mild (max 19°C on Wed morning, min 9°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the S by Thu afternoon).

Sat
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
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
!
3
4
3
1
2
0
0
0
1
0
0
0
!
2
!
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
ESE
7
1.9
E
11
2.2
E
11
2
E
10
2
E
11
1.8
ENE
11
1.7
ENE
11
1.6
ENE
10
1.5
ENE
10
1.3
ENE
10
1.4
ENE
10
1.1
ENE
9
0.9
ENE
9
0.9
ENE
9
0.7
ENE
9
2.1
S
9
2
S
8
2.5
S
10
1.9
S
11
1.6
S
10
Wave Graph
Metric surfscale
Energy kJ
181
795
1107
818
934
763
672
482
407
301
363
193
146
116
79
750
503
1360
798
464
Wind (km/h)
20
SE
20
SE
20
SE
15
SE
5
SE
5
SSW
10
ENE
10
NNW
10
N
20
NE
15
N
10
WNW
10
ENE
15
W
15
SW
30
S
20
SW
20
SW
10
SE
10
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-on
on
on
cross-on
on
cross
cross
cross
cross-off
off
cross-off
cross-off
cross-off
cross
High Tide
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
3:42PM1.32m
4:06AM0.89m
4:36PM1.36m
Low Tide
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
8:42AM0.45m
10:38PM0.50m
9:37AM0.49m
11:38PM0.44m
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:52
6:52
6:52
6:50
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:05
5:06
5:06
5:07
5:07
5:07
5:08
 mm
1
Temp °C
17
17
17
16
16
14
15
14
15
16
15
19
19
17
17
15
13
13
13
12
Feels °C
13
13
12
14
14
13
13
12
12
13
12
17
15
13
11
8
7
9
9
9
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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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