
Surf Forecasts:
Back Beach surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 8AM (local time) - 15ft (4.5m), 17s period, WSW swell with offshore winds.
- Most powerful swell: Sunday 9 Aug, 8AM (local time) - 15ft (4.5m), 17s period, WSW swell with 12,331 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 8AM (local time) - 15ft (4.5m), 17s period with WSW swell.
Best Forecast Surf Conditions for Back Beach this week:
The surf forecast for Back Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 09) at 8AM. The primary swell is predicted to be 4.5m and 17s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Back Beach in the next 16 days are 4.5m 17s and forecast to arrive on Sunday (Aug 09) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 15) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 9th Aug) | 15ft (4.5m) 17s |
| Best Surf | 8AM (Sun 9th Aug) | 15ft (4.5m) 17s |
| Most Powerful | 8AM (Sun 9th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Back Beach over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s have a look at what’s comin’ down the pipe for Back Beach over the next couple of weeks. Got a bit of a mixed bag ahead, but there’s definitely a few windows to get stoked about.
Right off the bat, we’re in a wild one. Sunday morning (August 9th) is crankin’ with a massive 14.8-foot swell from the WSW, but it’s got such a long period of 17 seconds that this is a serious groundswell. The energy is absolutely pumping – we’re talkin’ 10629 in the combined energy department, which is strong to very strong. Water temp’s sittin’ at 66.9°, dead average for this time of year. But here’s the thing – this swell is way too big for Back Beach. It’s an exposed beach break and that size with that period will just be a washing machine. Only for the absolute top-shelf experts, and even then it’s a risk. The wind’s light and offshore from the NE in the morning, so the surface’ll be clean, but the sheer power makes it a no-go for most. Sunday afternoon cleans up a bit to 13.1 feet, still a groundswell around 16 seconds, with glassy cross-offshore breezes from the NNW. Again, too big for a fun session.
The big stuff keeps rollin’ into Monday the 10th, but now we’ve got a strong onshore wind. Morning sees 22 mph from the W, makin’ it a choppy, lumpy mess on 7.9-foot swell. Then the wind swings SW and cranks up to 28 mph in the afternoon with 11.5 feet of onshore slop – just a write-off.
Tuesday the 11th serves up more oversized swell – 13.1 feet from the SW with a 16-second period. Morning has a light cross-offshore breeze from the E, so it’s clean, and Tuesday afternoon goes totally glassy with a 3 mph SSW wind. The conditions are perfect, but the swell is still too big for this break. The energy’s still massive, around 8568. A real tease.
Wednesday the 12th, we finally start to see a drop. Morning’s 9.8 feet from the SW with a 15-second period, light east wind, clean as a whistle – but again, too big for a comfortable session here. The afternoon lets down a bit with a cross-on shore breeze from the S at 9 mph, and the swell’s down to 8.2 feet but lumpy.
Thursday the 13th is more of the same – 9.8 feet in the morning, clean with light east winds, still a groundswell around 16 seconds. Way too big. Afternoon gets choppy with a 12 mph S cross-on breeze. You’re getting the picture – Back Beach is just getting hammered.
Now, let’s talk about the first real chance for a decent paddle. Friday the 14th morning, we’ve got a 9.8-foot groundswell from the SW, but the wind is offshore from the ENE at 9 mph, and it’s clean. Still on the big side for most. But look at Friday afternoon – the swell drops to 8.2 feet from the WSW, still a groundswell with 16-second period, and the wind goes light cross-offshore from the E at 6 mph. The conditions are clean and the energy is 3644 – moderate to strong. This is the pick of the week. It’s still only for experienced surfers, but the wave quality should be there, and the offshore component will hold the faces open.
Saturday the 15th sees a proper drop. Morning has a 6.9-foot WSW swell with a 14-second period, and a moderate offshore breeze from the NE at 12 mph. Clean, but the wind is a little strong to be perfect. Afternoon goes even smaller at 6.2 feet, with a light cross-shore from the SSE at 6 mph – marginal, but could be a fun grovel on a longboard.
Sunday the 16th keeps the 7.2-foot swell from the WSW. Morning has a fresh 22 mph offshore from the NNE, so it’ll be blown out and hard to surf. Afternoon is a cross-shore from the WNW at 12 mph, with some chop. Not ideal.
Monday the 17th, we get another pulse – 11
Short Range ForecastModerate rain (total 15mm), heaviest on Mon morning. Very mild (max 17°C on Mon morning, min 9°C on Tue morning). Winds decreasing (strong winds from the SW on Mon afternoon, calm by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Fri afternoon, min 11°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 17 | SW 13 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 |
Wave Graph | |||||||||||||||||||||
10629 | 7238 | 4447 | 2444 | 7712 | 4073 | 8940 | 8568 | 6355 | 3816 | 3093 | 2913 | 3903 | 4635 | 4689 | 4588 | 3644 | 2550 | 1676 | 1402 | 1512 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross-on | on | cross-on | cross-off | glassy | off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | off | cross-off | cross-off | off | cross | cross-off |
High Tide | 7:10AM0.72m | 8:04AM0.73m | 8:53AM0.71m | 9:36AM0.66m | 00:32AM0.29m | 10:13AM0.58m | 00:05AM0.34m | 10:40AM0.49m | 00:07AM0.40m | ||||||||||||
Low Tide | 4:07PM-0.05m | 4:42PM-0.05m | 5:16PM-0.02m | 5:43PM0.03m | 5:58PM0.10m | 2:11AM0.28m | 5:50PM0.18m | 3:48AM0.29m | 5:22PM0.22m | ||||||||||||
7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | |
mm | — | — | 3 | 4 | 4 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 15 | 15 | 17 | 16 | 13 | 10 | 12 | 13 | 13 | 15 | 15 | 14 | 17 | 15 | 17 | 20 | 19 | 19 | 22 | 20 |
Feels °C | 9 | 13 | 12 | 10 | 8 | 2 | 7 | 10 | 12 | 11 | 12 | 12 | 11 | 14 | 11 | 13 | 17 | 15 | 15 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | WSW 17 | WSW 16 | WSW 16 | WSW 15 | — | SW 13 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 |
10629 | 7238 | 4447 | 2444 | — | 4073 | 8940 | 8568 | 6355 | 3816 | 3093 | 2913 | 3903 | 4635 | 4689 | 4588 | 3644 | 2550 | 1676 | 1402 | 1512 | |
Swell 2 Height (m) Direction Period (s) | — | WSW 21 | WSW 20 | — | — | SW 16 | — | — | — | — | SW 24 | WSW 21 | — | — | — | — | — | — | — | — | W 26 |
— | 855 | 596 | — | — | 2214 | — | — | — | — | 22 | 180 | — | — | — | — | — | — | — | — | 13 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 6 | WSW 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 219 | 7712 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 248 | 220 | 569 | 2358 | 265 | 3 | 3 | 3 | 3 | 113 | 0 | 3 | 184 | 3 | 3 | 0 | 3 | 0 | 3 | 3 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Back Beach Surf forecast
The above surf forecast table for Back Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Back Beach can be found by selecting the local surf guide option on the grey menu. Our Back Beach 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 (Back Beach) 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 Back Beach 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.
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