
Surf Forecasts:
Cobblestones surf forecast from 10 Aug 2026:
- Best quality surf: Monday 10 Aug, 11PM (local time) - 21ft (6.5m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 21ft (6.5m), 16s period, SW swell with 19,661 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 11PM (local time) - 21ft (6.5m), 15s 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 Monday (Aug 10) at 11PM. The primary swell is predicted to be 6.5m and 15s 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 6.5m 16s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Saturday (Aug 15) at 5PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 10th Aug) | 21ft (6.5m) 15s |
| Best Surf | 11PM (Mon 10th Aug) | 21ft (6.5m) 15s |
| Most Powerful | 2AM (Tue 11th Aug) | 21ft (6.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, mates, let’s get right into it. This is the outlook for the next couple of weeks, and it’s a bit of a mixed bag. The first few days are a complete washout—way too much energy and messy conditions. The real surfing starts to get interesting mid-week, with a couple of proper standout windows for the crew who know what they’re doing.
Right off the bat, we’ve got a massive pulse of energy on Monday and Tuesday—we're talking strong to very strong with numbers up in the 17,000s on Tuesday—but it’s all cross-onshore and lumpy. That’s not surfable, that’s just a washing machine. You’ve got a solid 20ft of swell hitting the reef, but the wind’s all over it. Monday afternoon through Tuesday morning, unless you’re looking for a beating, you’re better off finding something else to do.
Then things start to settle. By Wednesday the 12th, the swell drops to a more manageable 13ft, but it's still onshore and a bit gutless. The period is long, around 15 seconds, so there's some push there, but it's not making the reef work how we want. It's marginal, to be honest.
Now, Thursday the 13th is where it starts to get interesting. The wind goes light cross-shore from the NNW in the morning, and the swell is still a solid 13ft with a long 16-second period. The energy is still high, over 8,500, but it's clean. This is a proper window for the experts. The afternoon looks good too, with a touch more size at 15ft and a 17-second period. This is where the long-period stuff really gets exciting.
Friday the 14th is a real standout. Morning session sees an 12ft southwest swell with a 15-second period, light offshore from the NNE, and clean conditions. The energy is still strong, around 5,800, but it’s manageable. This is a proper classic for this break. The afternoon gets a bit mixed, but the morning is the pick.
The weekend is a bit more of a repeat—clean mornings with a dropping swell. Saturday the 15th offers up 10ft and clean lines, with a light offshore in the morning. Sunday the 16th sees a bit more size, back up to 12ft by the afternoon, with a longer period again. Both mornings are looking clean, but the energy is starting to back off.
Now, Monday the 17th is another mess. That low pressure spins up a fresh pulse, but the wind howls onshore at 31 mph. That's a total write-off. Strong energy again, around 8,600 in the afternoon, but it's all over the place. Not for the paddle surfer, that day.
But hold on, Tuesday the 18th is your next big, big standout. This is probably the best window of the whole period. The morning shows an 12ft southwest swell, light offshore, and clean surf. The energy is strong again, nearly 8,700. The afternoon gets even better—15ft with a long 16-second period, light offshore, and an energy reading over 11,000. This is a proper, full-bore day for advanced surfers. If you can only pick one day, this is it.
After that, things taper off into the second week. It’s a bit of a slow fade. Wednesday morning the 19th still has some clean 10ft surf, but the energy's dropping, and by the afternoon it’s getting smaller and a bit weaker. From the 20th onward, it’s either smaller, messy, or too windy. There’s a bit of a pulse on the 22nd with a 15ft southwest swell and a 17-second period, but the wind is a bit cross-off from the SE—it could be good for some, but the quality is more uncertain. That one’s a bit of a wildcard, so keep an eye on it. The last few days fizzle out with weaker swells and more onshore wind.
So, to sum it up: the first few days are a write-off, Thursday the 13th and Tuesday the 18th are your best bets, with Friday the 14th and the weekend mornings as solid backups. The water's running about 4°F warmer than normal, so it’s a touch on the warm side—maybe skin up a bit thinner.
Remember, this spot at Cobblestones is a reef break, so it’s for the advanced crew. It's consistent, but with this kind of size and period, you need to know what you’re doing. The crowds are sometimes there, so you might not have it all to yourself. Stay safe out there.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Very mild (max 15°C on Tue night, min 10°C on Mon night). Winds decreasing (strong winds from the SSW on Mon night, calm by Wed night). | Days 5-7 Weather SummarySome drizzle, heaviest during Sat afternoon. Warm (max 20°C on Sun afternoon, min 11°C on Fri morning). Wind will be generally light. | ||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 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 18 |
Wave Graph | |||||||||||||||||||
19661 | 17353 | 13612 | 9286 | 7377 | 6892 | 7126 | 8696 | 10444 | 8055 | 6227 | 4763 | 3810 | 3243 | 2394 | 2421 | 4957 | 4574 | 7182 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | glassy | cross | on | cross-off | cross-off | cross | off | cross-off | cross-off | off | cross-off | cross-off | cross |
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 | ||||||||||
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 | |||||||||||
— | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | |
5:45 | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | |
mm | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 12 | 14 | 14 | 15 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 16 | 15 | 17 | 18 | 18 | 17 | 20 | 19 |
Feels °C | 4 | 7 | 7 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 11 | 13 | 14 | 13 | 14 | 16 | 11 | 16 | 15 |
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 18 |
— | 17353 | 13612 | 9286 | 7377 | 6892 | 7126 | 8696 | 10444 | 8055 | 6227 | 4763 | 3810 | 3243 | 2394 | 2421 | 4957 | 4574 | 7182 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 24 | SW 22 | — | — | — | — | — | — | — | — | — | N 5 | — | — | — |
— | — | — | — | 22 | 163 | — | — | — | — | — | — | — | — | — | 11 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | N 5 | — | — | N 4 | N 4 |
19661 | — | — | — | — | — | — | — | — | — | — | — | — | — | 42 | — | — | 22 | 16 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2675 | 89 | 88 | 268 | 2 | 2 | 2 | 0 | 16 | 2 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 86 | 15 |
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.











