Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 3 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
18.2° C
0.1° 

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 29 Jul 2026:

  • Best quality surf: Thursday 30 Jul, 10AM (local time) - 8ft (2.5m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 2 Aug, 1AM (local time) - 6ft (1.9m), 14s period, SSE swell with 1,322 kJ wave energy.
  • Next surfable swell (1★+): Thursday 30 Jul, 10AM (local time) - 8ft (2.5m), 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 Thursday (Jul 30) at 10AM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 2.1m and 10s. Another secondary swell of 0.1m and 6s is also forecast. 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 1.9m 14s and forecast to arrive on Sunday (Aug 02) 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 1.1m 6s period and expected on Tuesday (Aug 04) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Thu 30th Jul)8ft (2.5m) 10s
Best Surf10AM (Thu 30th Jul)8ft (2.5m) 10s
Most Powerful 1AM (Sun 2nd Aug)6ft (1.9m) 14s

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


The Lowdown

Right then, let's have a look at what's coming our way. The first few days are looking pretty grim, to be honest. We've got a bit of a wait on our hands before anything decent rolls in. The first solid recommendation doesn't kick off until Thursday morning, the 30th of July, so we're starting with a bit of a lull.

That first proper session is at Backdoor 4, and it's a big one. The water's sitting at 65°, which is pretty much spot-on for this time of year. Thursday morning we're looking at a 8 ft swell out of the South. That's a serious lump, pushing a massive 2110 combined energy, so you'll feel it. The wind is a cross-off from the SW at 9 mph, which is a solid plus, keeping the wave face clean. But look, this one's only for the experienced crew; at that size, it's a big, powerful wave. The crowd factor is "sometimes", so you might have some company, but it won't be a total circus. The period is 10 seconds, so it's got some punch.

Thursday afternoon things ease back to 6 ft from the South, with a clean 12 mph offshore from the SSE. The energy drops to a still-strong 494. The wind is the big plus here – proper offshore makes for some beautiful, clean walls.

Friday the 31st is the standout, no question. Friday morning at Backdoor 4, we've got 7 ft of South swell with that same clean cross-off wind from the SW at 9 mph. The combined energy is 1416, so it's got some serious grunt, but it's a better size for more people. This is excellent, high-quality surf for those with some experience. The South swell direction is spot-on for this break, and the conditions are clean. Friday afternoon is still very good, with 6 ft and a clean 12 mph offshore from the South.

Saturday morning the 1st of August drops to 5 ft, still South swell, with a light 6 mph cross-off from the SW. It's clean, but the energy is down to 445. It's good, but nothing groundbreaking.

Now, we hit a bit of a rough patch. Sunday the 2nd has some size – 6 ft with a long 12-second period from the SSE – but the wind is onshore from the North at 6 mph, which is messy. The energy is high at 1058, but the conditions kill it. Then we go through a real dry spell. From Sunday afternoon through to the 7th of August, it's mostly poor to marginal with small swell and dodgy winds. There's a small window on Wednesday morning the 5th with 5 ft from the South, but it's cross-on and only a 391 energy. Not worth getting excited about.

Thursday the 6th morning gives us 4 ft with a clean cross-off from the SW at 6 mph. The energy is low at 295. It's surfable, but ordinary.

After that, the middle of the month gets interesting again for the big-wave hunters. Monday the 10th of August we're back up to 6 ft from the SE with a 11-second period, but the wind is onshore. The real power kicks off on Tuesday the 11th: 7 ft of SE swell with a short 7-second period and a combined energy of 680. The wind is a moderate cross from the West at 12 mph, so it's a bit of a mess, but that's a lot of moving water. This one is too big for beginners. Then Wednesday the 12th of August is a monster: 8 ft of SSE swell, period at 8 seconds, and a combined energy of 820. The wind is light cross, but the juice is there. The absolute standout of the late period though is Thursday the 14th of August. 8 ft of South swell, 8-second period, and a massive 1804 combined energy. The wind is a moderate cross from the West. This is big, powerful, and only for experts who know what they're doing.

So, to wrap it up: if you're an experienced surfer, Friday the 30th of July morning is the best all-rounder for quality. For the big-wave crew, keep your eyes on Tuesday the 11th, Wednesday the 12th, and especially Thursday the 14th of August. The period on the 11th and 12th is short, so it'll be a bit lumpy and rolly, better for a reef or point break than a straight beach.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 15°C on Fri morning, min 10°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

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

Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
2
3
4
3
3
2
2
2
3
0
1
0
0
0
0
0
0
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
S
10
1.7
S
9
2
S
11
2
S
10
1.9
S
10
1.9
S
9
1.6
S
9
1.6
SSE
9
1.9
SSE
14
1.7
SSE
12
1.8
SE
12
1.4
SE
12
1.1
SE
11
0.9
SE
11
0.6
SE
10
0.4
SE
10
0.7
S
6
1.4
S
10
1.5
S
9
1.6
S
10
1.6
S
10
Wave Graph
Metric surfscale
Energy kJ
1257
490
900
786
660
632
440
406
1322
776
948
549
278
194
89
25
40
402
373
502
492
Wind (km/h)
15
SW
20
SSE
15
WSW
15
SW
20
S
15
WSW
10
SW
10
E
10
NNE
10
N
25
NE
15
NNW
20
WNW
25
NNW
20
W
15
W
10
ESE
20
WNW
10
WNW
15
E
15
SW
Wind State
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
cross
cross-on
on
cross-on
on
cross
cross-on
cross
cross
cross-off
cross
cross-on
cross
cross-off
High Tide
8:43PM1.60m
9:22AM1.16m
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
Low Tide
2:16PM0.34m
3:24AM0.14m
2:56PM0.34m
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
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:47
6:46
6:45
6:45
6:43
6:43
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:13
5:14
5:14
5:15
5:15
5:15
5:16
 mm
Temp °C
13
13
14
15
15
15
14
15
15
16
17
16
19
19
14
16
16
12
15
15
14
Feels °C
9
8
11
10
11
11
13
13
12
12
12
12
13
13
9
13
12
6
12
12
11
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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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