
Surf Forecasts:
Cobblestones surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 11AM (local time) - 20ft (6.0m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 11AM (local time) - 20ft (6.0m), 16s period, SW swell with 17,353 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 11AM (local time) - 20ft (6.0m), 16s period with SW swell.
Best Forecast Surf Conditions for Cobblestones this week:
The surf forecast for Cobblestones over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 11AM. The primary swell is predicted to be 6.0m and 16s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 6.0m 16s and forecast to arrive on Tuesday (Aug 11) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Aug 15) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 11th Aug) | 20ft (6.0m) 16s |
| Best Surf | 11AM (Tue 11th Aug) | 20ft (6.0m) 16s |
| Most Powerful | 11AM (Tue 11th Aug) | 20ft (6.0m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G'day, Rusty here. Let's get straight into it. We've got one spot on the radar for this entire stretch, and it's a proper reef break that's going to test you. It's a bit of a wild ride, so let's break down the next couple of weeks.
The big picture is that we're looking at a solid run of south-west groundswell, but it's going to be a game of timing and wind. Most days are going to be a battle with the conditions, but there are a couple of windows where it all comes together. The water is sitting at 67°, which is a solid 4° warmer than usual for this time of year—that's a notable spike, so you can leave the thick rubber at home.
Let's kick things off in the short term. For the next couple of days, Tuesday and Wednesday, there's a serious amount of energy in the water. The combined swell energy is massive, reading 17353 on Tuesday morning, and the swell is pushing a solid 20ft at 16 seconds from the south-west. But, and it's a big but, the wind is howling from the south-west at 19 mph, putting a nasty cross-onshore chop all over it. It's big, it's raw, and frankly, it's just too much for this break. The call is to give it a miss; it's not going to be pretty. Wednesday sees the swell dip to a still-chunky 13ft, but it's still onshore, so it's a washout in my books.
Now, here's where it gets interesting. Thursday the 13th is looking like a proper standout. The swell is still a solid 13ft from the south-west, but the energy has cleaned up a bit. The magic is the wind. It's dropped right out, down to a 3 mph cross-shore breeze in the morning. Glassy conditions on a 16-second groundswell at a reef like this? That's the stuff dreams are made of. The shape should be excellent, and the long period will mean plenty of power. This is the one to point the car at.
Friday the 14th is still good, with the swell easing to a more manageable 12ft. The wind swings to a light cross-offshore from the north-northeast in the morning at 9 mph, which will keep the faces clean. It won't have the same raw power as Thursday, but it's still a quality day with clean conditions.
The weekend sees things get a bit smaller and a bit messier. Saturday the 15th has the swell dropping to 8ft, but the morning moderate breeze and the drop in period to 14 seconds mean it loses some of its punch. Sunday the 16th sees a slight bump back up to 12ft, but the wind and the consistency just aren't there for it to be a standout.
We hit a flat, ugly patch from Monday the 17th through Tuesday the 18th. The wind goes straight onshore and howls, making it completely unsurfable. The energy is still there, but the quality is zero. You'd be better off finding something else to do.
Now, looking further out, we've got another potential winner. The following Wednesday the 19th, the swell kicks back up to a solid 16ft from the west-south-west, and the wind goes light and offshore. Again, the energy is strong, reading 12903. This looks very promising, but it's over a week away, so treat it as promising rather than a sure thing.
The end of the month is a lottery. There are some windows with clean cross-offshore winds and decent swell on the 21st and 22nd, but the periods are shorter and the wind models are less reliable. The absolute last day, the 26th, is a no-go with strong onshore winds.
So, to sum it up: if you can only pick one day, make it Thursday the 13th. It's got the size, the period, and the cleanest conditions. The following Wednesday the 19th is a close second. Get on it.
Rusty, out.
Short Range ForecastMostly dry. Very mild (max 14°C on Tue morning, min 12°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Wed night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 18°C on Sat afternoon, min 11°C on Fri morning). Winds increasing (light winds from the WNW on Fri afternoon, fresh winds from the NW by Sun night). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | WSW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 16 | WSW 16 |
Wave Graph | |||||||||||||||||||||
17353 | 14004 | 9166 | 7377 | 6892 | 7126 | 8589 | 9772 | 8055 | 6461 | 5050 | 3810 | 2725 | 1974 | 1682 | 5025 | 4334 | 4963 | 6995 | 7621 | 6265 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | glassy | cross | on | cross-off | cross-off | cross-on | off | cross-off | cross-off | off | cross-off | cross-off | cross-on | on | on | cross-on |
High Tide | 8:35AM1.02m | 9:17AM0.98m | 9:55AM0.92m | 10:26AM0.82m | 00:30AM0.56m | 10:47AM0.72m | 00:00AM0.59m | 10:48AM0.62m | 11:55PM0.64m | 10:00AM0.54m | 00:10AM0.70m | ||||||||||
Low Tide | 5:34PM0.24m | 6:03PM0.29m | 6:23PM0.35m | 6:25PM0.42m | 3:53AM0.53m | 6:01PM0.46m | 5:05AM0.52m | 5:10PM0.47m | 6:30AM0.52m | 4:12PM0.44m | |||||||||||
7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | |
— | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | 10 | — | — |
Temp °C | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 16 | 15 | 17 | 18 | 18 | 17 | 18 | 18 | 15 | 16 | 15 |
Feels °C | 7 | 8 | 9 | 11 | 11 | 12 | 12 | 13 | 12 | 11 | 13 | 14 | 12 | 13 | 16 | 12 | 13 | 12 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | WSW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 16 | WSW 16 |
17353 | 14004 | 9166 | 7377 | 6892 | 7126 | 8589 | 9772 | 8055 | 6461 | 5050 | 3810 | 2725 | 1974 | 1682 | 5025 | 4334 | 4963 | 6995 | 7621 | 6265 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 24 | SW 22 | — | — | — | — | — | — | — | — | — | SW 16 | — | — | — | — | — | — |
— | — | — | 22 | 163 | — | — | — | — | — | — | — | — | — | 534 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | N 4 | NNW 6 | N 5 | — | N 4 | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 48 | 94 | 27 | — | 24 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 268 | 2435 | 2 | 2 | 2 | 0 | 2 | 2 | 0 | 0 | 2 | 0 | 53 | 53 | 0 | 86 | 14 | 53 | 1689 | 630 | 201 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Cobblestones Surf forecast
The above surf forecast table for Cobblestones provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cobblestones can be found by selecting the local surf guide option on the grey menu. Our Cobblestones 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 (Cobblestones) 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 Cobblestones 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.
Cobblestones is 85 km (53 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.











