
Surf Forecasts:
Backdoor 4 surf forecast from 29 Jul 2026:
- Best quality surf: Thursday 30 Jul, 10AM (local time) - 8ft (2.5m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 1AM (local time) - 6ft (1.9m), 14s period, SSE swell with 1,322 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 10AM (local time) - 8ft (2.5m), 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 Thursday (Jul 30) at 10AM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 2.1m and 10s. Another secondary swell of 0.1m 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 1.9m 14s and forecast to arrive on Sunday (Aug 02) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Aug 04) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 30th Jul) | 8ft (2.5m) 10s |
| Best Surf | 10AM (Thu 30th Jul) | 8ft (2.5m) 10s |
| Most Powerful | 1AM (Sun 2nd Aug) | 6ft (1.9m) 14s |
Table - best surf conditions forecast for Backdoor 4 over the next 16 days.
The Lowdown
Right then, let's have a look at what's coming our way. The first few days are looking pretty grim, to be honest. We've got a bit of a wait on our hands before anything decent rolls in. The first solid recommendation doesn't kick off until Thursday morning, the 30th of July, so we're starting with a bit of a lull.
That first proper session is at Backdoor 4, and it's a big one. The water's sitting at 65°, which is pretty much spot-on for this time of year. Thursday morning we're looking at a 8 ft swell out of the South. That's a serious lump, pushing a massive 2110 combined energy, so you'll feel it. The wind is a cross-off from the SW at 9 mph, which is a solid plus, keeping the wave face clean. But look, this one's only for the experienced crew; at that size, it's a big, powerful wave. The crowd factor is "sometimes", so you might have some company, but it won't be a total circus. The period is 10 seconds, so it's got some punch.
Thursday afternoon things ease back to 6 ft from the South, with a clean 12 mph offshore from the SSE. The energy drops to a still-strong 494. The wind is the big plus here – proper offshore makes for some beautiful, clean walls.
Friday the 31st is the standout, no question. Friday morning at Backdoor 4, we've got 7 ft of South swell with that same clean cross-off wind from the SW at 9 mph. The combined energy is 1416, so it's got some serious grunt, but it's a better size for more people. This is excellent, high-quality surf for those with some experience. The South swell direction is spot-on for this break, and the conditions are clean. Friday afternoon is still very good, with 6 ft and a clean 12 mph offshore from the South.
Saturday morning the 1st of August drops to 5 ft, still South swell, with a light 6 mph cross-off from the SW. It's clean, but the energy is down to 445. It's good, but nothing groundbreaking.
Now, we hit a bit of a rough patch. Sunday the 2nd has some size – 6 ft with a long 12-second period from the SSE – but the wind is onshore from the North at 6 mph, which is messy. The energy is high at 1058, but the conditions kill it. Then we go through a real dry spell. From Sunday afternoon through to the 7th of August, it's mostly poor to marginal with small swell and dodgy winds. There's a small window on Wednesday morning the 5th with 5 ft from the South, but it's cross-on and only a 391 energy. Not worth getting excited about.
Thursday the 6th morning gives us 4 ft with a clean cross-off from the SW at 6 mph. The energy is low at 295. It's surfable, but ordinary.
After that, the middle of the month gets interesting again for the big-wave hunters. Monday the 10th of August we're back up to 6 ft from the SE with a 11-second period, but the wind is onshore. The real power kicks off on Tuesday the 11th: 7 ft of SE swell with a short 7-second period and a combined energy of 680. The wind is a moderate cross from the West at 12 mph, so it's a bit of a mess, but that's a lot of moving water. This one is too big for beginners. Then Wednesday the 12th of August is a monster: 8 ft of SSE swell, period at 8 seconds, and a combined energy of 820. The wind is light cross, but the juice is there. The absolute standout of the late period though is Thursday the 14th of August. 8 ft of South swell, 8-second period, and a massive 1804 combined energy. The wind is a moderate cross from the West. This is big, powerful, and only for experts who know what they're doing.
So, to wrap it up: if you're an experienced surfer, Friday the 30th of July morning is the best all-rounder for quality. For the big-wave crew, keep your eyes on Tuesday the 11th, Wednesday the 12th, and especially Thursday the 14th of August. The period on the 11th and 12th is short, so it'll be a bit lumpy and rolly, better for a reef or point break than a straight beach.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Fri morning, min 10°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon morning, min 9°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 10 | S 9 | S 11 | S 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 14 | SSE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | S 6 | S 10 | S 9 | S 10 | S 10 |
Wave Graph | |||||||||||||||||||||
1257 | 490 | 900 | 786 | 660 | 632 | 440 | 406 | 1322 | 776 | 948 | 549 | 278 | 194 | 89 | 25 | 40 | 402 | 373 | 502 | 492 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross | cross-on | on | cross-on | on | cross | cross-on | cross | cross | cross-off | cross | cross-on | cross | cross-off |
High Tide | 8:43PM1.60m | 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 | 2:16PM0.34m | 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 | ||||||||
6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | 5:13 | — | — | 5:14 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 15 | 15 | 15 | 14 | 15 | 15 | 16 | 17 | 16 | 19 | 19 | 14 | 16 | 16 | 12 | 15 | 15 | 14 |
Feels °C | 9 | 8 | 11 | 10 | 11 | 11 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 9 | 13 | 12 | 6 | 12 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 9 | S 11 | S 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 14 | SSE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SSW 6 | S 6 | S 10 | S 9 | S 10 | S 10 |
849 | 490 | 900 | 623 | 660 | 632 | 440 | 406 | 1322 | 776 | 948 | 549 | 278 | 194 | 89 | 29 | 40 | 402 | 373 | 502 | 492 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | NE 6 | — | ENE 6 | ENE 7 | ENE 7 | NE 7 | SSE 14 | E 18 | SE 14 | S 21 | S 21 | S 20 | NE 5 | E 15 | SE 10 | SSE 10 | ESE 8 | ENE 13 | ENE 10 | ENE 9 |
1 | 1 | — | 4 | 5 | 5 | 2 | 133 | 6 | 276 | 36 | 35 | 8 | 3 | 4 | 25 | 9 | 7 | 17 | 20 | 16 | |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | — | E 13 | E 13 | E 13 | E 12 | NE 7 | — | E 17 | E 17 | NE 8 | E 16 | S 19 | NE 9 | ESE 7 | ESE 7 | E 13 | E 8 | E 18 | E 12 |
3 | 3 | — | 3 | 3 | 3 | 3 | 2 | — | 6 | 6 | 2 | 5 | 7 | 3 | 5 | 5 | 14 | 1 | 6 | 3 | |
Wind waves Height (m) Direction Period (s) | S 10 | — | — | S 10 | — | — | — | — | — | — | NE 8 | NE 4 | NNE 5 | WNW 3 | WSW 4 | W 3 | SSW 6 | — | — | — | — |
1257 | — | — | 786 | — | — | — | — | — | — | 3 | 22 | 15 | 6 | 8 | 3 | 90 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 36 | 2 | 2 | 231 | 2 | 2 | 11 | 2 | 2 | 21 | 2 | 0 | 37 | 0 |
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.










