Backdoor 4 Surf Break

Lat Long: 33.28° S 151.57° E

Issued: 3 am 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor 4 sea temperature is
19.6° C

1.0°C warmer than normal for this time of year

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 3 Jul 2026:

  • Best quality surf: Sunday 5 Jul, 7AM (local time) - 8ft (2.5m), 12s period, S swell with offshore winds.
  • Most powerful swell: Sunday 5 Jul, 7PM (local time) - 11ft (3.5m), 12s period, S swell with 3,196 kJ wave energy.
  • Next surfable swell (1★+): Saturday 4 Jul, 1PM (local time) - 4.5ft (1.3m), 11s 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 (Jul 04) at 1PM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.4m 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 3.5m 12s and forecast to arrive on Sunday (Jul 05) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 12s period and expected on Saturday (Jul 04) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Sat 4th Jul)4.5ft (1.3m) 11s
Best Surf 7AM (Sun 5th Jul)8ft (2.5m) 12s
Most Powerful 7PM (Sun 5th Jul)11ft (3.5m) 12s

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


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here. Let's have a look at what's cookin'.

Right off the bat, it’s a weird one for Backdoor 4 (Hawaii). The water temp is sitting at 67°, which is a full 2° warmer than average for this time of year – feels like we’re already in summer mode. But don’t let that fool you into thinking we’re getting easy waves. The whole first week is basically a washout for us regular paddlers because the swell is just way too meaty. We're looking at a serious pulse of Southern Hemi energy arriving Saturday the 5th of July that’s just too big for this spot to handle.

Saturday the 5th kicks off with a solid 12 ft S swell at 11 seconds, blowing offshore but the energy is enormous (2616). It’s an expert-only zone. That trend holds all the way through until Friday the 11th of July. The swell stays big, but the real kicker is those offshore and cross-off winds keeping the faces clean. Even though the conditions look like a postcard, the wave heights are consistently over 8 ft, so this isn't for the faint-hearted. The combined energy just screams power, with most sessions showing three-digit figures and some like Sunday afternoon the 6th hitting 2640.

The one true standout window for a wider crew finally appears on Friday the 11th of July morning. The swell drops back to 8 ft from the SSE (11 seconds), but the magic is in the wind – it’s glassy. Absolutely still air. For a reef break like this, that’s as good as it gets for clean lines. It's still shoulder-to-head high plus, so it’s not a learner wave, but for anyone solid intermediate and above, that Friday morning is the pick of the entire period. The energy is still strong (1299) but manageable. Friday afternoon stays clean with a light cross-off, just a touch smaller at 8 ft.

After that, things get a bit sad. From Saturday the 12th through to Tuesday the 15th of July, we have a proper flat spell. The swell drops to barely a ripple – 3 ft on the Sunday, then down to 0.7 ft by Tuesday the 15th morning. Wind is onshore or cross-shore, making it choppy and messy. No point even looking at it. That’s a solid 4-day gap of nothing.

Then, just when you think it's over, Tuesday the 15th afternoon throws a massive curveball. The swell jumps to 15 ft from the S at 11 seconds. The energy reading is a staggering 4082. It's clean with cross-off wind, but that is a monster. It stays huge through Wednesday the 16th and Thursday the 17th – all 10 ft or bigger. This is strictly for the heavy crew on the biggest boards they own. It'll be breaking way outside, pitching hard.

We get a slight reprieve on Friday the 18th of July with a drop to 7 ft SE groundswell, but the wind is a fresh offshore (19 mph), making for clean but tricky conditions. That’s another expert session. The final weekend (Saturday 19th and Sunday 20th) stays solid with 8 ft to 12 ft sets, clean and lined up, but still too much for a normal day out.

Bottom line: This is a big-wave period for Backdoor 4. If you’re not a charger, the only window worth paddling for is that glassy Friday the 11th of July morning. Everything else is either flat or frightening.

Rusty.

Short Range Forecast

Moderate rain (total 15mm), heaviest on Sat night. Very mild (max 16°C on Sun night, min 12°C on Sat morning). Mainly fresh winds.

Days 4-6 Weather Summary

Moderate rain (total 16mm), heaviest on Thu night. Very mild (max 16°C on Tue night, min 11°C on Tue night). Winds decreasing (fresh winds from the S on Tue night, light winds from the SSW by Thu night).

Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
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
2
2
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
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3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
S
11
1.1
S
10
1.1
S
8
3.5
S
11
2.5
S
10
3
SSE
11
2.5
SSE
10
2.5
SSE
10
2.1
SE
10
2.5
SSE
10
3
SSE
11
3
SSE
11
3
SSE
10
2.5
SSE
10
2.5
SSE
10
2.5
SSE
9
3
SSE
9
2.4
SSE
11
2.4
SSE
11
2.3
SSE
10
1.9
SSE
10
Wave Graph
Metric surfscale
Energy kJ
573
220
173
2605
1611
1981
1324
1288
799
1422
1816
1733
1608
1234
1276
1207
1270
1306
1292
1107
678
Wind (km/h)
10
WNW
10
SE
10
SSW
35
S
30
SSE
25
SSE
25
SSE
25
SSE
25
SSW
25
SSW
25
SSW
30
SSW
25
SW
30
SSW
20
SW
25
SW
25
SSW
15
SW
5
S
5
WSW
15
WSW
Wind State
cross-on
cross-off
cross-off
off
off
cross-off
cross-off
off
off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
cross-off
High Tide
11:11AM1.10m
10:54PM1.46m
11:55AM1.14m
11:35PM1.39m
12:42PM1.19m
00:21AM1.30m
1:34PM1.25m
1:18AM1.20m
2:29PM1.33m
2:25AM1.12m
3:27PM1.43m
3:41AM1.07m
4:26PM1.53m
Low Tide
4:36PM0.46m
5:41AM0.19m
5:25PM0.50m
6:18AM0.20m
6:22PM0.52m
6:59AM0.22m
7:29PM0.53m
7:46AM0.24m
8:44PM0.49m
8:39AM0.27m
10:00PM0.41m
9:38AM0.29m
11:12PM0.30m
clear
clear
rain showers
rain showers
light rain
light rain
light rain
rain showers
rain showers
rain showers
light rain
rain showers
clear
rain showers
rain showers
clear
part cloud
rain showers
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:56
6:56
6:56
6:56
6:56
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
4:58
4:58
4:59
4:59
5:00
5:00
5:00
 mm
2
1
2
4
1
2
3
2
3
2
2
1
6
3
3
1
Temp °C
15
15
15
14
15
16
16
16
15
15
15
16
15
15
14
15
15
14
13
14
13
Feels °C
13
14
13
7
9
10
11
11
10
10
11
10
9
9
9
9
10
11
12
13
11
Swell 1
Height (m)
Direction
Period (s)
1.5
S
11
1.1
S
10
0.6
S
12
0.3
E
8
1.7
S
13
0.2
E
13
0.2
E
14
0.2
E
14
1.3
S
11
0.7
SE
14
0.1
S
17
2.5
SE
11
0.8
ESE
14
2.5
SSE
10
0.5
ESE
11
0.4
ESE
10
2.4
SSE
11
2.4
SSE
11
2.3
SSE
10
1.9
SSE
10
Energy kJ
573
220
98
11
1016
13
16
15
372
186
5
1473
210
1234
70
39
1306
1292
1107
678
Swell 2
Height (m)
Direction
Period (s)
0.4
NE
7
0.5
S
12
0.3
E
11
0.2
E
13
0.2
E
14
0.2
E
13
0.2
E
13
0.6
ESE
12
0.1
S
23
0.1
S
16
0.1
S
17
0.9
SE
14
0.1
S
19
0.1
S
21
0.1
SE
13
Energy kJ
14
74
23
13
15
14
14
115
10
5
6
264
7
8
7
Swell 3
Height (m)
Direction
Period (s)
0.2
E
13
0.3
ENE
7
0.2
ENE
7
0.1
S
16
0.1
S
22
0.1
S
22
Energy kJ
14
10
5
5
10
9
Wind waves
Height (m)
Direction
Period (s)
1.1
S
8
3.5
S
11
2.5
S
10
3
SSE
11
2.5
SSE
10
2.5
SSE
10
2.1
SE
10
2.5
SSE
10
3
SSE
11
3
SSE
11
3
SSE
10
2.5
SSE
10
2.5
SSE
9
3
SSE
9
Energy kJ
173
2605
1611
1981
1324
1288
799
1422
1816
1733
1608
1276
1207
1270
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
4
4
3
4
4
3
4
4
5
4
2
4
4
3
4
3
3
3
Distance (km)
0
0
0
168
270
248
176
176
0
0
1
52
0
141
0
21
0
0
0
0
0
Best forecast wave conditions in Newcastle
Rating
(10 max)
3
2
2
4
4
4
4
4
4
4
4
4
4
3
Best forecast wave conditions in Australia
Rating
(10 max)
5
5
6
5
4
7
4
4
8
7
4
5
6
5
5
4
4
4
4
4
4
Header Global
Rating
(10 max)
7
5
6
5
9
7
5
6
8
7
4
5
9
8
9
6
5
5
8
5
8
  • Map Icons:
  • Break
  • 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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