Surf Forecasts:
Backdoor 4 surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 10PM (local time) - 7.5ft (2.3m), 12s period, S swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 13ft (4.0m), 14s period, S swell with 6,307 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 7PM (local time) - 4ft (1.2m), 9s 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 Sunday (Sep 06) at 7PM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.3m and 6s. Another secondary swell of 0.2m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Backdoor 4 in the next 16 days are 4.0m 14s and forecast to arrive on Thursday (Sep 10) at 7PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Sunday (Sep 06) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Sun 6th Sep) | 4ft (1.2m) 9s |
| Best Surf | 10PM (Sun 6th Sep) | 7.5ft (2.3m) 12s |
| Most Powerful | 7PM (Thu 10th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Backdoor 4 over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down.
The first few days are a bit of a dud at Backdoor 4. Friday the 4th has a little 4ft south swell, but the wind is on it and the energy is weak. Not worth your time. Saturday and Sunday are tiny and choppy.
Come Monday morning the 7th, the wind goes glassy, dead calm, and we’ve got a clean 4ft south swell with moderate energy. That’s a nice little window for a paddle. The water temp is about average for this time of year.
Now, Tuesday the 8th brings a solid 7ft south-southeast swell at 8 seconds, but it’s flagged as too big for this break. The energy is strong and the wind is offshore in the morning, but handle with care. The afternoon session is a beauty though – 6ft, clean, gentle offshore wind. That’s a standout.
Wednesday the 9th is a washout. Then Thursday the 10th brings a monster: 10ft south swell with a 10-second period. The energy is huge (over 2000). That’s a proper swell, but it’s way too big for Backdoor 4. Only for experts.
The real cream comes on Friday the 11th. The afternoon drops to 6ft, solid 11-second period, clean offshore wind, and big energy. That’s excellent for experienced surfers. The swell is south, and the reef likes east, so it’s not perfect, but the quality is there. This is your best bet.
Saturday the 12th holds well – 5ft south swell, light offshore wind, clean. Good session. Sunday the 13th fades fast. The following week is a lot of small, choppy, or windy surf. The last days of the window get hammered by near gale-force winds (over 30 mph) and heavy rain, with a massive 7ft south swell on the 18th and 19th, but it’s just too wild to surf.
So, the standout is the afternoon of Friday the 11th – 6ft south swell, clean offshore, excellent for experienced surfers. Monday the 7th morning is a good, clean glass-off for a smaller wave.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat afternoon, min 15°C on Sat night). Winds increasing (light winds from the NNE on Fri morning, fresh winds from the WNW by Sat afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Very mild (max 17°C on Mon morning, min 10°C on Wed night). Winds increasing (light winds from the SW on Mon morning, strong winds from the S by Wed afternoon). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | S 12 | S 9 | S 12 | S 10 | S 9 | S 9 | S 6 | S 7 | S 11 | S 8 | S 9 | SSE 7 | S 9 | SSE 8 | SSE 10 | SSE 9 | S 9 | SSE 9 | S 12 | S 12 | S 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 441 | 198 | 68 | 121 | 58 | 43 | 66 | 108 | 1107 | 319 | 263 | 362 | 885 | 350 | 502 | 294 | 463 | 1413 | 3235 | 2079 | 4747 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | on | cross-on | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | cross-off | on | cross-off | off | cross-off | off | off | off |
High Tide | 1:25PM1.43m | 2:14AM0.96m | 2:40PM1.44m | 3:44AM0.96m | 3:54PM1.49m | 4:59AM1.02m | 5:00PM1.56m | 5:57AM1.12m | 5:57PM1.63m | 6:45AM1.22m | 6:46PM1.66m | 7:28AM1.31m | 7:31PM1.65m | ||||||||
Low Tide | 8:22PM0.37m | 7:47AM0.46m | 9:46PM0.33m | 9:08AM0.47m | 10:58PM0.24m | 10:24AM0.43m | 11:54PM0.15m | 11:29AM0.35m | 00:41AM0.08m | 12:24PM0.27m | 1:23AM0.04m | 1:14PM0.21m | 2:00AM0.03m | ||||||||
 | |  | |  | | | | |  | |  | | | | | | |  | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 2 | 2 | 1 | 2 |
Temp °C | 17 | 18 | 18 | 27 | 29 | 22 | 20 | 18 | 16 | 17 | 17 | 16 | 16 | 16 | 15 | 17 | 14 | 12 | 13 | 14 | 15 |
Feels °C | 13 | 12 | 15 | 21 | 24 | 20 | 15 | 14 | 13 | 16 | 14 | 12 | 12 | 13 | 12 | 13 | 5 | 3 | 5 | 6 | 9 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 9 | S 8 | S 10 | S 9 | NE 6 | S 6 | NE 6 | S 11 | S 8 | S 9 | ENE 10 | S 9 | SSE 8 | SSE 10 | SSE 9 | ENE 9 | ENE 9 | S 23 | S 14 | S 12 |
| kJ | 441 | 198 | 43 | 121 | 58 | 39 | 66 | 6 | 1107 | 319 | 263 | 9 | 885 | 350 | 502 | 294 | 8 | 8 | 263 | 1505 | 3956 |
Swell 2 Height (m) Direction Period (s) | NE 8 | ENE 10 | S 12 | ENE 9 | ENE 5 | S 9 | NE 7 | E 10 | ENE 10 | E 10 | E 10 | NE 7 | E 9 | S 11 | ENE 10 | ENE 9 | S 17 | E 16 | E 16 | E 9 | E 15 |
| kJ | 9 | 18 | 68 | 17 | 14 | 43 | 24 | 8 | 10 | 8 | 8 | 2 | 7 | 114 | 9 | 8 | 6 | 5 | 5 | 15 | 4 |
Swell 3 Height (m) Direction Period (s) | ENE 10 | S 18 | NE 4 | SSW 15 | E 9 | E 11 | E 11 | S 15 | E 10 | NE 8 | NE 8 | — | NE 9 | E 10 | NE 9 | E 16 | E 17 | E 16 | NE 16 | — | ENE 15 |
| kJ | 19 | 6 | 12 | 46 | 15 | 9 | 9 | 4 | 8 | 2 | 2 | — | 3 | 7 | 3 | 5 | 6 | 5 | 10 | — | 21 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | — | NNE 3 | NW 3 | WNW 3 | W 3 | S 7 | — | — | — | SSE 7 | — | — | — | NNW 3 | S 9 | SSE 9 | S 12 | S 12 | S 13 |
| kJ | — | 3 | — | 6 | 4 | 1 | 1 | 108 | — | — | — | 362 | — | — | — | 1 | 463 | 1413 | 3235 | 2079 | 4747 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 91 | 0 | 37 | 2 | 2 | 3 | 552 | 0 | 0 | 456 | 139 | 48 | 0 | 2 | 0 | 731 | 215 | 169 | 456 | 1 |
Best forecast wave conditions in Newcastle | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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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