
Surf Forecasts:
Cobblestones surf forecast from 7 Aug 2026:
- Best quality surf: Saturday 8 Aug, 5AM (local time) - 21ft (6.5m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 5AM (local time) - 25ft (7.5m), 16s period, SW swell with 28,184 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 5AM (local time) - 21ft (6.5m), 14s 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 Saturday (Aug 08) at 5AM. The primary swell is predicted to be 6.5m and 14s 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 7.5m 16s and forecast to arrive on Tuesday (Aug 11) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Aug 14) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Best Surf | 5AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Most Powerful | 5AM (Tue 11th Aug) | 25ft (7.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, let’s get into it.
The long-range charts have been showing a lot of juice for Cobblestones, but it’s a classic case of too much of a good thing for a while. This reef is going to be absolutely slabbin’ for the first stretch, but it’s going to be way over everyone’s head, even the locals. We’re talking a serious pulse of southwest groundswell that’s just going to be too big and unruly.
The opening days are a write-off for paddling. Saturday the 8th and Sunday the 9th are seeing massive, powerful swell in the 23ft range early, with strong onshore winds. It’s going to be a foaming, blown-out mess. You’d be mad to even think about it. The energy is insane, but it’s just raw, un-rideable power. The onshore flow is going to be howling.
We get a bit of a breather Monday the 10th, but it’s still big and ugly with the wind remaining on it. Tuesday the 11th brings another massive pulse, with the energy meter peaking at a massive 47374. Again, the comments say it’s too big for the break. You’d need a jet ski and a death wish. The water is also running a bit warmer than usual for this time of year, which is notable, but you won’t feel it while you’re getting drilled.
The middle of the week, from Wednesday the 12th through Thursday the 13th, the swell backs down a touch but it’s still in that heavy zone, and the winds stay messy. Thursday afternoon shows a bit of promise as the wind drops light, but it’s still a solid 15ft of southwest swell, and the period jumps to 17 seconds. That's a long-period groundswell, which at a reef like this could be a thing of beauty, but it’s still too much juice for most. The tide is also a question mark.
Now, here’s where it gets interesting. The standout window is Friday the 14th and Saturday the 15th. This is the one to circle. The swell eases to a still-chunky 11-13ft, and more importantly, the wind goes light offshore from the north. This is the combo we dream about. Friday morning looks the cleanest, with a cross-offshore breeze and clean conditions. The swell direction is still SSW, which is right in the sweet spot for this reef. It’s going to be a serious, heavy, expert-only wave, but for those guys, it will be perfection. Saturday morning looks smaller, but Saturday afternoon sees another pulse of west swell and clean conditions, which could be just as good.
Sunday the 16th, things taper off a bit with some lumpy conditions, but Monday the 17th is another promising one. The swell jumps back up to 16ft with a 17-second period and a light offshore wind. That’s another day for the big-wave crew only. The potential is there for some absolutely epic, grinding barrels.
After that, the wheels come off again. The wind howls from the west on Tuesday the 18th, and we’re back to blown-out conditions. The rest of that week into the weekend is a mix of onshore winds and dropping swell, with the size fading fast. By the 22nd and 23rd, we’re down to 7-10ft of sloppy, wind-affected surf. It’s a disappointing end to what started with so much promise.
So, to keep it simple: if you’re an expert, you live for the 14th, 15th, and 17th of August. Those are the standouts. The rest is either too big, too messy, or both. For everyone else, the next couple of weeks are a write-off.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Fri night. Very mild (max 16°C on Sun afternoon, min 8°C on Mon afternoon). Winds decreasing (near gales from the SW on Sat morning, moderate winds from the WSW by Sun morning). | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Mon night. Very mild (max 16°C on Wed morning, min 10°C on Mon night). Winds decreasing (strong winds from the SSW on Mon night, light winds from the WNW by Thu afternoon). | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 14 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 11 | SW 13 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 15 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||
14577 | 20969 | 26231 | 21926 | 12497 | 8899 | 5224 | 7905 | 14817 | 28020 | 24006 | 18363 | 12736 | 9178 | 8347 | 6967 | 7870 | 11404 | 8923 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | off |
High Tide | 5:45AM0.95m | 6:51AM1.00m | 7:46AM1.03m | 8:35AM1.02m | 9:17AM0.98m | 9:55AM0.92m | |||||||||||||
Low Tide | 3:46PM0.22m | 4:24PM0.20m | 5:00PM0.20m | 5:34PM0.24m | 6:03PM0.29m | 6:23PM0.35m | |||||||||||||
— | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | |
5:44 | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | |
mm | 8 | 4 | 1 | — | — | — | 3 | 6 | 4 | 5 | — | — | 2 | 1 | — | — | — | — | — |
Temp °C | 15 | 11 | 12 | 14 | 15 | 16 | 16 | 14 | 9 | 12 | 14 | 15 | 15 | 16 | 16 | 16 | 15 | 15 | 15 |
Feels °C | 6 | -1 | 1 | 8 | 9 | 10 | 8 | 3 | -3 | 2 | 6 | 7 | 8 | 11 | 11 | 12 | 12 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | — | — | — | SW 17 | SW 16 | SW 16 | SW 15 | — | — | — | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 15 | SW 17 | SW 16 |
— | — | — | 21926 | 12497 | 8899 | 5224 | — | — | — | 24006 | 18363 | 12736 | 9178 | 8347 | 6967 | 7870 | 11404 | 8923 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 21 | — | — | — | — | — | — | — | — | — | — | SW 20 | — | — | — |
— | — | — | — | 548 | — | — | — | — | — | — | — | — | — | — | 246 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 14 | SW 15 | SW 16 | — | — | — | WNW 6 | SW 11 | SW 13 | SW 16 | SW 17 | — | — | — | — | — | — | — | — |
14577 | 20969 | 26231 | — | — | — | 265 | 7905 | 14817 | 28020 | 23368 | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1907 | 1900 | 2004 | 234 | 211 | 331 | 251 | 1106 | 2672 | 2165 | 219 | 2652 | 64 | 220 | 359 | 89 | 2 | 2 | 0 |
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.











