Surf Break

Lat Long: 33.28° S 151.57° E

Backdoor 4 Surf Forecast and Surf Report

Issued: 4 am 17 Oct 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
20.5°C
1.5° 

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 16 Oct 2026:

  • Best quality surf: Monday 19 Oct, 5AM (local time) - 3.5ft (1.1m), 8s period, ESE swell with glassy winds.
  • Most powerful swell: Friday 23 Oct, 8PM (local time) - 8ft (2.4m), 7s period, ENE swell with 525 kJ wave energy.
  • Next surfable swell (1★+): Monday 19 Oct, 5AM (local time) - 3.5ft (1.1m), 8s period with ESE 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 Monday (Oct 19) at 5AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Backdoor 4 in the next 16 days are 2.4m 7s and forecast to arrive on Friday (Oct 23) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 19th Oct)3.5ft (1.1m) 8s
Best Surf 5AM (Mon 19th Oct)3.5ft (1.1m) 8s
Most Powerful 8PM (Fri 23rd Oct)8ft (2.4m) 7s

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


Short Range Forecast

Light rain (total 4mm), mostly falling on Sat night. Very mild (max 18°C on Sat afternoon, min 15°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 20mm), heaviest during Wed night. Very mild (max 19°C on Wed afternoon, min 16°C on Tue morning). Wind will be generally light.

Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
1
0
0
1
0
0
0
0
2
1
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SE
9
1.3
SE
9
1.3
SE
9
1.3
SE
9
1.2
SE
8
0.9
SE
8
0.8
SE
8
1.2
ENE
5
0.9
ENE
5
1
ENE
8
1.1
ENE
8
1.4
ENE
8
1.3
ENE
8
1.5
E
8
1.6
ENE
8
1.4
ENE
8
1.4
ENE
8
1.6
ENE
7
1.4
ENE
7
2.2
ENE
7
1.8
ENE
7
Wave Graph
Metric surfscale
Energy kJ
388
281
263
252
206
109
71
70
39
123
147
210
235
316
330
244
257
258
197
440
325
Wind (km/h)
15
E
20
E
15
E
10
NE
20
ENE
10
N
10
ESE
25
ENE
15
NNE
15
NE
25
ENE
5
NNW
10
E
20
ENE
15
NE
20
ENE
20
ENE
20
NE
20
NE
35
NE
15
N
Wind State
cross-off
cross
cross
cross-on
cross
on
cross-off
cross
on
cross-on
cross-on
glassy
cross
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-on
on
High Tide
1:09PM1.30m
2:21AM0.89m
2:11PM1.25m
3:40AM0.91m
3:20PM1.23m
4:46AM0.97m
4:23PM1.24m
5:36AM1.07m
5:18PM1.28m
6:17AM1.19m
6:06PM1.31m
6:53AM1.32m
6:52PM1.34m
Low Tide
8:20PM0.44m
7:24AM0.62m
9:28PM0.44m
8:43AM0.65m
10:28PM0.41m
10:04AM0.63m
11:16PM0.35m
11:10AM0.56m
11:56PM0.28m
12:05PM0.47m
00:32AM0.22m
12:53PM0.37m
1:08AM0.16m
part cloud
clear
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
rain showers
rain showers
thunderstorm
rain showers
rain showers
rain showers
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
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—
6:09
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—
6:09
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—
6:07
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—
6:05
—
—
6:05
—
—
6:03
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—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
7:07
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—
7:07
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—
7:07
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—
7:08
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—
7:09
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7:10
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7:12
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 mm
—
—
2
2
—
—
—
—
—
—
—
—
—
1
7
5
2
5
1
—
—
Temp °C
17
18
18
17
18
18
17
18
18
17
18
18
18
19
19
19
19
19
20
20
20
Feels °C
13
14
14
15
15
14
16
16
14
15
15
15
18
16
17
17
17
17
18
17
18
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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Quick surf report for Backdoor 4:

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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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