Surf Forecasts:
Cobblestones surf forecast from 14 Aug 2026:
- Best quality surf: Monday 17 Aug, 11AM (local time) - 13ft (4.0m), 17s period, WSW swell with onshore winds.
- Most powerful swell: Friday 21 Aug, 8PM (local time) - 16ft (5.0m), 19s period, SW swell with 18,770 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 5PM (local time) - 8ft (2.5m), 13s 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 15) at 5PM. The primary swell is predicted to be 2.5m and 13s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 19s and forecast to arrive on Friday (Aug 21) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 7s period and expected on Monday (Aug 17) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 15th Aug) | 8ft (2.5m) 13s |
| Best Surf | 11AM (Mon 17th Aug) | 13ft (4.0m) 17s |
| Most Powerful | 8PM (Fri 21st Aug) | 16ft (5.0m) 19s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, Rusty here again with the imperial version. Let’s break down what’s on the cards for Cobblestones over the next couple of weeks.
This is an advanced reef break, so it’s a serious spot for experienced surfers only.
We get a little taste this Friday afternoon, August 14th. There’s a 12ft SW groundswell with a 15-second period, but the wind is slight cross-onshore creating small ripples. The combined energy is strong at 4699. Water temp is 66°, a touch warmer than normal. Not a standout, but it’s something.
Wednesday afternoon, August 19th through Thursday morning, August 20th is the first real highlight. A powerful 13ft to 15ft SW swell, period around 15-16 seconds, with combined energy reaching 9858. The wind is light cross-onshore. This is big, clean, and for the experienced only. Crowds are “sometimes” likely.
But the absolute standout is Saturday, August 22nd. Saturday morning is clear with a light cross-offshore breeze, a 12ft SW groundswell at 16 seconds, and a combined energy of 5678. The conditions are called exceptional for experts. Saturday afternoon is even better – glassy, with a 10ft SW groundswell at a very long 17-second period. That’s a proper groundswell, perfect for a reef break. This is the session to aim for: clean, powerful, and cranking.
After that, it gets wild. Sunday August 23rd has strong offshore winds but the swell starts getting lumpy. Monday 24th turns onshore and messy. Tuesday August 25th brings a massive 18ft WSW swell with 16-second period and combined energy of 15494 – it’s simply too big for this break. A no-go.
A brief nice moment on Wednesday morning, August 26th with glassy conditions and a 10ft SW swell at 14 seconds.
The final week has more swell, but wind and chop are the story. Saturday August 29th has a 13ft SW swell at 16 seconds with moderate cross-shore wind and combined energy at 8870. Marginal but maybe worth a look.
So, the best on offer: Saturday August 22nd – both morning and afternoon – with clean, glassy conditions and a very long period SW groundswell. Wednesday the 19th is the next best. Everything else is either too big, too windy, or too average. Don’t miss that Saturday.
– Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Mon morning. Very mild (max 19°C on Sun afternoon, min 14°C on Mon morning). Winds increasing (calm on Fri night, strong winds from the W by Mon afternoon). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue afternoon. Very mild (max 16°C on Tue night, min 12°C on Wed night). Winds decreasing (strong winds from the WSW on Mon night, calm by Wed night). | ||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 14 | SW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | WSW 17 | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 16 | WSW 15 | SW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 3810 | 2844 | 2209 | 1528 | 3866 | 3388 | 3530 | 10381 | 15442 | 10952 | 10369 | 9364 | 6206 | 7460 | 9850 | 9281 | 6813 | 4918 | 4823 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | cross-off | cross-off | cross | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-off | cross-on | on | cross-on |
High Tide | 00:30AM0.56m | 10:47AM0.72m | 00:00AM0.59m | 10:48AM0.62m | 11:55PM0.64m | 10:00AM0.54m | 00:10AM0.70m | 00:37AM0.74m | 1:15AM0.78m | 2:08AM0.81m | |||||||||
Low Tide | 3:53AM0.53m | 6:01PM0.46m | 5:05AM0.52m | 5:10PM0.47m | 6:30AM0.52m | 4:12PM0.44m | 3:35PM0.38m | 3:25PM0.34m | 3:31PM0.30m | ||||||||||
 |  | |  | | | |  |  | |  | |  |  |  | | | | | |
 | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — |
 | 5:49 | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | 7 | 2 | — | — | 1 | 2 | — | 1 | — | — | — | — |
Temp °C | 16 | 16 | 17 | 17 | 16 | 19 | 19 | 18 | 14 | 14 | 13 | 14 | 16 | 16 | 15 | 14 | 16 | 16 | 16 |
Feels °C | 13 | 11 | 13 | 16 | 10 | 13 | 14 | 11 | 3 | 4 | 7 | 9 | 9 | 11 | 12 | 13 | 12 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 | WSW 17 | — | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 16 | WSW 15 | SW 15 | SW 14 |
| kJ | 3810 | 2844 | 2209 | 1528 | 3866 | 3388 | 3530 | 8982 | — | 10952 | 10369 | 9364 | 6206 | 7460 | 9850 | 9281 | 6813 | 4918 | 4823 |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 16 | SW 24 | SW 22 | SW 20 | NNW 7 | — | — | SW 16 | — | — | — | — | — | — | — | SW 26 |
| kJ | — | — | — | 1390 | 87 | 558 | 1422 | 273 | — | — | 765 | — | — | — | — | — | — | — | 27 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | N 4 | N 4 | N 5 | N 5 | N 6 | NNW 6 | WSW 17 | WSW 17 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 15 | 19 | 7 | 100 | 221 | 230 | 10381 | 15442 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 53 | 0 | 0 | 165 | 159 | 165 | 1689 | 1689 | 574 | 566 | 359 | 251 | 89 | 1 | 0 | 38 | 38 | 1 |
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.
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