Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 9 pm 30 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 30 Jul 2026:

  • Best quality surf: Friday 31 Jul, 10AM (local time) - 7ft (2.1m), 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★+): Friday 31 Jul, 10AM (local time) - 7ft (2.1m), 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 Friday (Jul 31) at 10AM. The primary swell is predicted to be 2.1m and 10s period with a secondary swell of 1.8m and 10s. Another secondary swell of 0.2m 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 1.7m 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 1.3m 6s period and expected on Wednesday (Aug 05) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Fri 31st Jul)7ft (2.1m) 10s
Best Surf10AM (Fri 31st Jul)7ft (2.1m) 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, this is Rusty, and I’m looking at the next 16 days for Backdoor 4. It’s a reef break, intermediate-level, and it’s pretty much always breaking when there’s swell. This is an exposed spot, and it likes swell from the east.

The window kicks off with a bang, but it’s a bit of a dangerous one. Friday, July 31st, is looking at a serious pulse of swell. We’re talking about 7ft to 7ft of south swell, and the energy is massive at 1481. That’s a lot of water moving. The wind is offshore, which is perfect, but honestly, this is too big for most. That’s expert territory only. The period is a very long 10 seconds, so it’s a proper groundswell, but that size on a reef is no joke.

After that, things settle down. Saturday morning, August 1st, is the real standout for the average surfer. The swell drops to a much friendlier 5ft from the south, with a period of 9 seconds. The wind is a light cross-offshore, and the water temperature is about average for this time of year. The energy is still moderate at 448. This is going to be clean, fun, and manageable. It’s the best on offer, a solid choice.

Saturday afternoon gets a bit smaller and the wind goes cross, making it less appealing. The rest of the weekend and into the next week is a write-off. From Sunday the 2nd through to around Wednesday the 5th, the conditions are poor, with onshore winds or just tiny, weak swell. There’s a big gap of a few days with no real surf to speak of.

Then, on Wednesday, August 5th, the afternoon looks interesting. The swell bumps back up to 6ft from the south, with a period of 11 seconds, and the energy is strong at 720. The wind is glassy offshore and it’s clean. This is another highlight, but it’s a bit bigger. It’s a second great option, but the Saturday morning session is the one I’d be marking on the calendar.

For the rest of the second week, from the 6th onwards, it’s a real mixed bag of small, weak swells and poor wind. There’s some clean surf in the mornings, but the energy is low, nothing to get excited about. The weekend of the 8th and 9th offers some chest-high, clean waves, but it’s inconsistent. Later in the forecast, the wind gets howling from the southwest, which makes the surf tiny and blown out. It’s looking like a kite surfer’s paradise more than a paddle surfer’s.

So, to wrap it up: the first Friday is for experts only. The absolute best bet for everyone else is Saturday morning, August 1st. There’s a solid second chance on Wednesday afternoon, August 5th. After that, it’s a waiting game.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Sun morning, min 11°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 21°C on Mon morning, min 9°C on Tue night). Winds decreasing (fresh winds from the WSW on Tue afternoon, light winds from the SSE by Wed afternoon).

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
!
!
3
2
1
1
1
0
1
0
0
0
0
0
0
0
3
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
S
11
2.1
S
10
2.2
S
10
1.9
S
9
1.6
S
9
1.5
SSE
9
1.6
SSE
14
1.5
SSE
12
1.6
SSE
13
1.4
SSE
12
1.1
SE
11
0.9
SE
11
0.5
SE
11
0.3
ESE
7
0.2
SSE
10
0.3
S
11
1.3
S
11
1.7
S
11
1.6
S
10
Wave Graph
Metric surfscale
Energy kJ
917
849
876
641
440
337
985
575
809
527
293
198
55
10
9
21
375
711
472
Wind (km/h)
15
WSW
20
SSW
20
S
15
SW
10
SW
10
E
10
N
10
N
25
NE
10
NNW
15
NNW
15
NNW
20
WNW
20
W
15
WSW
20
WNW
15
W
5
SSE
15
WSW
Wind State
cross-off
cross-off
off
cross-off
cross-off
cross
on
on
cross-on
on
on
on
cross-on
cross
cross-off
cross
cross
off
cross-off
High Tide
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
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
clear
clear
clear
clear
part cloud
clear
cloud
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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>
5:14
5:14
5:15
5:15
5:15
5:16
 mm
Temp °C
14
14
15
15
14
15
15
16
16
16
21
21
16
17
18
11
16
18
13
Feels °C
11
9
11
11
12
12
11
12
11
12
16
17
12
11
13
5
13
15
8
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  • 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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