Surf Forecasts:
Cobblestones surf forecast from 29 Aug 2026:
- Best quality surf: Friday 4 Sep, 8AM (local time) - 21ft (6.5m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Friday 4 Sep, 11AM (local time) - 21ft (6.5m), 16s period, SW swell with 19,981 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 8AM (local time) - 11ft (3.5m), 18s 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 Sunday (Aug 30) at 8AM. The primary swell is predicted to be 3.5m and 18s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 6.5m 16s and forecast to arrive on Friday (Sep 04) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 30th Aug) | 11ft (3.5m) 18s |
| Best Surf | 8AM (Fri 4th Sep) | 21ft (6.5m) 15s |
| Most Powerful | 11AM (Fri 4th Sep) | 21ft (6.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, folks, Rusty here. We’ve got a single name on the cards for the next couple of weeks, and it’s a proper big-wave playground. Let’s get into it.
The pattern is dominated by a long run of solid, powerful SW groundswell, but the wind is going to be the main character for most of it. There are some absolute gems hidden in the mix, but you’ll need to pick your window with care. The water temp is sitting about average for the time of year, which is a nice bonus if you’re paddling out at Cobblestones (a reef setup).
We kick off this Sunday, the 30th of August, with a proper taste of what’s to come. The morning session is where it’s at; a clean 12 ft swell from the SW with a 17-second period and a light cross-offshore breeze from the NE. The wave energy is pumping. This is exceptional for the crew who can handle a heavy reef. This is a stand-out. The afternoon sees a drop in quality with a cross-shore breeze, making it a bit more grumpy.
Monday the 31st and Tuesday the 1st of September look pretty grim. The wind swings onshore and picks up, turning that solid 8 ft to 10 ft swell into a lumpy, messy affair. Not worth a look.
Wednesday the 2nd and Thursday the 3rd of September are a write-off. The swell stays big, but the cross-onshore wind is just too strong, and the wave state is poor. The energy is high, but it’s all for nothing with the wind.
Friday the 4th of September morning is a serious watch. The swell is massive at 21 ft from the SW with a 16-second period, and the energy is through the roof. The file says it’s predicted to be too big even for this break. If you’re an absolute charger, it’s there, but 21 ft on a reef is not for the faint of heart. The afternoon is still messy.
Saturday the 5th of September still has that massive 18 ft to 21 ft swell, but it’s onshore and lumpy. The afternoon surge is huge, but again, it’s too big and onshore.
Now, here’s the real standout of the whole forecast. Sunday the 6th of September morning. The swell drops to a still-very-strong 15 ft from the SW with a 14-second period, but the wind is a clean, light offshore from the SE. The wave comment is exceptional. This is the one. Crystal clear, clean faces, and a proper groundswell on a reef. This is it.
The following week is a bit of a mixed bag. Through to the 14th of September, the swell remains solid, mostly in the 13 ft to 20 ft range, but the wind is often onshore or cross-onshore. There are a few mornings with lighter winds, like the 10th of September with a cross-offshore wind, but the wind does pick up later. The 13th of September afternoon has a massive 20 ft swell with a 16-second period, but it’s labeled as likely too big. The run ends on the 14th of September with an 18 ft swell and a strong cross-onshore breeze.
So, bottom line: if you’re a seasoned expert, the 30th of August morning is a solid call, but the absolute pinnacle is that Sunday the 6th of September morning session. That’s the one you point your calendar at.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon afternoon. Very mild (max 19°C on Sun afternoon, min 13°C on Sat night). Winds increasing (light winds from the WNW on Sun night, fresh winds from the SSW by Mon afternoon). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu night. Very mild (max 16°C on Tue night, min 12°C on Fri morning). Winds increasing (light winds from the WSW on Wed night, near gales from the W by Thu night). | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 14 | WSW 14 | SW 13 | SW 16 | SW 15 | SW 14 |
Wave Graph | |||||||||||||||||||
6314 | 6471 | 4844 | 3684 | 3700 | 3152 | 4963 | 4346 | 4129 | 4508 | 3612 | 3263 | 3788 | 4708 | 6038 | 9230 | 19981 | 14625 | 8685 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 11:06PM0.63m | 10:54AM0.71m | 11:15PM0.67m | 11:39AM0.61m | 11:33PM0.73m | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | |||||||||
Low Tide | 4:35AM0.46m | 5:13PM0.46m | 5:41AM0.44m | 4:55PM0.49m | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | ||||||||||
— | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | |
5:59 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | |
mm | — | — | — | — | — | 3 | 2 | — | — | 2 | 1 | — | — | — | — | 6 | 1 | — | — |
Temp °C | 16 | 17 | 19 | 17 | 17 | 17 | 14 | 14 | 14 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 13 | 13 | 12 |
Feels °C | 14 | 15 | 17 | 14 | 14 | 11 | 10 | 9 | 9 | 11 | 12 | 12 | 12 | 10 | 11 | 8 | 4 | 6 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | — | SW 16 | SW 15 | SW 14 |
6314 | 6471 | 4844 | 3684 | 3700 | 3152 | 4963 | 4346 | 4129 | 4508 | 3612 | 3263 | 3788 | 4708 | 4491 | — | 19981 | 14625 | 8685 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 20 | — | — | — | — | — | — | — | — | — | — | S 13 | — | — | — | — |
— | — | — | 441 | — | — | — | — | — | — | — | — | — | — | 14 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | — | — | — | W 5 | WSW 7 | — | — | — | — | — | — | — | — | WSW 14 | SW 13 | — | — | — |
35 | — | — | — | 92 | 349 | — | — | — | — | — | — | — | — | 6038 | 9230 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 0 | 38 | 2 | 359 | 359 | 2 | 2 | 39 | 201 | 2 | 2 | 64 | 212 | 306 | 1689 | 1823 | 1869 | 2 |
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.











