Surf Forecasts:
Cobblestones surf forecast from 12 Aug 2026:
- Best quality surf: Monday 17 Aug, 11AM (local time) - 13ft (4.0m), 18s period, WSW swell with cross-shore winds.
- Most powerful swell: Monday 17 Aug, 8PM (local time) - 15ft (4.5m), 17s period, WSW swell with 12,115 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2AM (local time) - 13ft (4.0m), 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 Thursday (Aug 13) at 2AM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 17s and forecast to arrive on Monday (Aug 17) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Wednesday (Aug 19) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 13th Aug) | 13ft (4.0m) 15s |
| Best Surf | 11AM (Mon 17th Aug) | 13ft (4.0m) 18s |
| Most Powerful | 8PM (Mon 17th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
We’ve got a solid run of groundswell heading to Cobblestones, but it’s going to get rowdy. The water is sitting at 67°, which is a touch warmer than normal for this time of year – nothing crazy, but noticeable if you’re used to a chill on your feet.
The standout window is clear as day: Thursday morning, August 13th. That’s the pick of the whole period. You’ve got a 13-foot SW groundswell with a long 16-second period, but the wind is glassy – dead calm. That’s a rare combo on this reef. The wave energy is pumping at 9419 (moderate to strong), and it’s aiming straight in from the optimum SSW direction. This is exceptional, expert-only territory. Over 8 feet, so leave the foamies at home. Expect lined-up, powerful reef waves with no wind to mess ‘em up. Cobblestones is an exposed spot, so that glass will give you absolute perfection.
Thursday afternoon (August 13th) is still fun, with a 13-foot SW swell and a 17-second period, energy at 9854, but the wind goes cross-on at 6 mph – a light breeze, but it’s not glass. Still good for experts, but the morning is the true gem.
Friday morning (August 14th) keeps the quality up: 12 feet SW at 16 seconds, clean with a cross-off NNE breeze at 6 mph. Energy is still solid at 5898. The waves will be a little more manageable for strong experienced surfers.
That Thursday morning, August 13th, is the one you circle on the calendar. Whole lot of power, no wind, reef lines. Be there or be square.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Fri afternoon, min 11°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 30mm), heaviest during Mon afternoon. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the NE on Sat night, strong winds from the NNW by Mon morning). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6892 | 7500 | 9419 | 9854 | 7675 | 5898 | 4763 | 3810 | 2844 | 2359 | 1555 | 4160 | 3761 | 3879 | 9510 | 11794 | 10122 | 10481 | 9482 | 5812 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | glassy | cross-on | cross-off | cross-off | cross | off | cross-off | cross-off | off | cross-off | cross-off | cross | cross | on | cross-on | on | cross-on | cross |
High Tide | 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 | 00:37AM0.74m | ||||||||||
Low Tide | 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 | 3:35PM0.38m | ||||||||||
 |  | | | | | | | | | | | |  |  |  |  | |  |  | |
 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — |
 | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 21 | 6 | — | — | 1 |
Temp °C | 14 | 14 | 13 | 13 | 13 | 14 | 16 | 15 | 16 | 17 | 16 | 17 | 20 | 19 | 18 | 15 | 14 | 14 | 15 | 15 |
Feels °C | 11 | 12 | 12 | 11 | 11 | 12 | 14 | 14 | 11 | 13 | 15 | 10 | 14 | 15 | 12 | 10 | 5 | 8 | 10 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 18 | — | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
| kJ | 6892 | 7500 | 9419 | 9854 | 7675 | 5898 | 4763 | 3810 | 2844 | 2359 | 1528 | 4160 | 3761 | 3879 | 8605 | — | 7862 | 10481 | 9482 | 5812 |
Swell 2 Height (m) Direction Period (s) | SW 22 | — | — | — | — | — | — | — | — | — | WSW 16 | SW 23 | SW 21 | SW 20 | — | — | WNW 10 | W 18 | — | — |
| kJ | 163 | — | — | — | — | — | — | — | — | — | 1555 | 140 | 763 | 1261 | — | — | 490 | 6389 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 5 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | N 4 | N 5 | — | NNE 4 | N 5 | NNW 5 | WSW 17 | WSW 17 | WSW 16 | — | — | NW 5 |
| kJ | — | — | — | — | — | — | — | — | 29 | 29 | — | 22 | 94 | 23 | 9510 | 11794 | 10122 | — | — | 84 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 0 | 0 | 2 | 0 | 0 | 20 | 0 | 53 | 0 | 0 | 165 | 86 | 143 | 201 | 474 | 1134 | 2 | 359 | 220 |
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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