Surf Forecasts:
Backdoor 4 surf forecast from 10 Aug 2026:
- Best quality surf: Thursday 13 Aug, 1PM (local time) - 7ft (2.2m), 9s period, S swell with offshore winds.
- Most powerful swell: Tuesday 11 Aug, 7PM (local time) - 6ft (1.9m), 12s period, S swell with 963 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 1PM (local time) - 3.5ft (1.1m), 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 Wednesday (Aug 12) at 1PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.5m and 10s. Another secondary swell of 0.4m and 3s 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 1.9m 12s and forecast to arrive on Tuesday (Aug 11) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Aug 16) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Wed 12th Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 1PM (Thu 13th Aug) | 7ft (2.2m) 9s |
| Most Powerful | 7PM (Tue 11th Aug) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Backdoor 4 over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s look at what’s coming up for Backdoor 4 over the next couple of weeks. I’ll be honest with you, it’s a real mixed bag, and we’ve got a slow start to get through.
Right off the bat, there’s nothing good on the table for the first few days. Monday the 10th and Tuesday the 11th are a write-off. Strong cross-onshore winds and messy conditions mean you’re better off doing something else. We don’t see anything worth paddling out for until things start to improve later in the week.
The first real chance of a decent wave comes on Thursday the 13th. After a clean but short-period morning, the afternoon picks up with a building 6 ft swell from the S, period of 9 seconds – not super long, but enough to get some push. The wind goes light cross-offshore and it cleans right up. The combined energy is moderate (637). It’s not a world-beater, but it’s the best we’ve seen so far by a long shot. Expect some fun ones.
Friday the 14th keeps that clean vibe going. Smaller swell at 5 ft from the S, but still clean with light winds. Good for a longer session without the crowds going mental. Both morning and afternoon look clean and rideable.
Saturday the 15th and Sunday the 16th are a step down in size, but the wind stays favourable, with some offshore in the afternoons. Swell drops to under 3 ft but remains clean. It’s not going to blow your mind, but if you’re hanging out for a push, it’ll be better than the early week mess.
Now, if you can hold out until the following week, we’ve got some absolute gems on the horizon. Thursday the 20th and Friday the 21st mornings look glassy as can be, with light S winds and clean 4 ft swell coming from the ESE. The energy is moderate (234/230). These are the two standouts of the whole period. Trust me, with that kind of glass and a consistent reef break like Backdoor 4, you’ll be in for a treat. That’s where I’d be pointing my board.
The entire sequence after that shows a bit more swell from the ENE, but the wind turns more cross and cross-on, meaning the quality drops. By the 22nd and 23rd, it’s looking choppy again.
Keep your eye on the 20th and 21st – those mornings are the real deal.
Rusty, signing off.
Short Range ForecastSome drizzle, heaviest during Mon morning. Warm (max 20°C on Tue afternoon, min 11°C on Tue night). Winds decreasing (strong winds from the NW on Mon afternoon, calm by Wed morning). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 16°C on Sat morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | ENE 9 | ENE 9 | ENE 9 | ENE 9 | S 12 | S 10 | S 10 | S 9 | S 8 | S 7 | S 9 | S 8 | S 9 | S 9 | S 8 | S 7 | S 9 | S 8 | SSE 6 | S 7 | S 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 588 | 334 | 108 | 73 | 556 | 551 | 273 | 136 | 113 | 239 | 606 | 265 | 235 | 306 | 142 | 59 | 122 | 71 | 129 | 89 | 221 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross | cross | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off |
High Tide | 6:09PM1.71m | 6:59AM1.13m | 7:02PM1.78m | 7:49AM1.20m | 7:50PM1.80m | 8:34AM1.27m | 8:36PM1.77m | 9:17AM1.32m | 9:19PM1.68m | 9:58AM1.36m | 10:01PM1.55m | 10:39AM1.38m | 10:43PM1.39m | ||||||||
Low Tide | 11:31AM0.33m | 1:02AM0.07m | 12:29PM0.27m | 1:50AM-0.00m | 1:22PM0.22m | 2:33AM-0.03m | 2:12PM0.19m | 3:13AM-0.02m | 3:01PM0.20m | 3:50AM0.03m | 3:50PM0.23m | 4:26AM0.10m | 4:39PM0.29m | ||||||||
 |  |  |  | | | | | | | | | | |  | | |  | |  | | |
 | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 2 | 3 | 3 |
Temp °C | 16 | 15 | 16 | 19 | 20 | 13 | 18 | 18 | 14 | 15 | 15 | 14 | 14 | 15 | 15 | 16 | 15 | 15 | 15 | 15 | 15 |
Feels °C | 7 | 5 | 8 | 16 | 16 | 7 | 15 | 14 | 8 | 11 | 11 | 11 | 11 | 12 | 13 | 14 | 11 | 10 | 12 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 9 | SSW 7 | S 12 | S 10 | S 10 | S 9 | S 8 | S 7 | S 9 | S 8 | S 9 | S 9 | S 8 | S 7 | S 9 | S 8 | S 13 | S 7 | S 12 |
| kJ | 588 | 334 | 108 | 57 | 556 | 551 | 273 | 136 | 113 | 181 | 606 | 265 | 235 | 306 | 142 | 59 | 122 | 71 | 52 | 89 | 221 |
Swell 2 Height (m) Direction Period (s) | S 13 | S 13 | E 13 | ENE 9 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | S 21 | S 9 | ENE 10 | S 14 | ENE 10 | S 12 | ESE 5 |
| kJ | 3 | 3 | 4 | 73 | 73 | 45 | 54 | 51 | 52 | 52 | 29 | 29 | 31 | 30 | 134 | 28 | 18 | 34 | 21 | 72 | 22 |
Swell 3 Height (m) Direction Period (s) | — | — | S 12 | S 12 | ENE 9 | N 4 | — | S 14 | S 16 | S 12 | NE 7 | S 15 | S 16 | S 20 | ENE 10 | ENE 10 | S 16 | ENE 10 | S 18 | ENE 10 | ENE 10 |
| kJ | — | — | 3 | 3 | 103 | 1 | — | 4 | 5 | 3 | 2 | 4 | 5 | 32 | 18 | 18 | 42 | 18 | 25 | 21 | 20 |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 5 | WNW 5 | W 4 | — | W 4 | NW 3 | NW 3 | W 4 | S 7 | — | — | — | — | — | — | — | SE 4 | SSE 6 | E 5 | — |
| kJ | 42 | 91 | 80 | 12 | — | 9 | 2 | 2 | 9 | 239 | — | — | — | — | — | — | — | 16 | 129 | 11 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 180 | 117 | 150 | 2 | 0 | 2 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 461 | 226 |
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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