Surf Forecasts:
Cobblestones surf forecast from 22 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 8AM (local time) - 18ft (5.5m), 19s period, WSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 26 Aug, 8AM (local time) - 18ft (5.5m), 19s period, WSW swell with 20,733 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 8AM (local time) - 18ft (5.5m), 19s period with WSW 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 Wednesday (Aug 26) at 8AM. The primary swell is predicted to be 5.5m and 19s 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 5.5m 19s and forecast to arrive on Wednesday (Aug 26) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Aug 25) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 26th Aug) | 18ft (5.5m) 19s |
| Best Surf | 8AM (Wed 26th Aug) | 18ft (5.5m) 19s |
| Most Powerful | 8AM (Wed 26th Aug) | 18ft (5.5m) 19s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, it’s Rusty here, and I’m looking at a mixed bag for Cobblestones. This break is an advanced reef set-up, so it’s for the crew who know what they’re doing, and the next couple of weeks are a wild ride.
We start off with nothing worth paddling out for. Sunday the 23rd is a write-off – strong cross-onshore winds from the SSW at 12 mph, sloppy 8 ft swell, and the energy is just ugly (2766). It’s cloudy and choppy with no love at all. Monday the 24th tries to clean up a bit in the morning with a NW breeze, but the cross-shore wind still messes it up, and it’s a “marginal” situation. The swell size is around 10 ft but it’s messy.
Monday afternoon goes backwards, and Tuesday the 25th is a complete disaster with fresh breezes (22 mph) and an 12 ft swell that’s totally blown out – that afternoon gets a zero score. Kite surfers might have a look at that one, but for a paddle surfer, forget it.
Now, the standout. Wednesday the 26th. This is the big one, but it comes with a huge caveat. The swell is predicted to be 18 ft on the face, with a period of 18 seconds – that’s a very long-period groundswell (combined energy at a massive 19985). The wind is light and onshore, but the report says it’s “wind and tide favorable, but the swell is predicted to be too big for this break.” At over 8 ft, this is strictly for experts. This is a serious, heavy reef wave. If you’re not a pro, don’t even think about it. The morning looks promising if you’re a gun, but it’s dangerous.
Thursday the 27th drops off a little, still 13 ft but with a moderate cross-shore (SSE, 16 mph) making it lumpy. Not a great call.
Saturday the 29th brings a glimmer of hope. The morning session shows off 8 ft at 16 seconds from the SW, combined energy of 3402, and here’s the beauty – offshore wind from the East at 9 mph. This is a clean, off-the-bank wave. The report says “excellent surf conditions for experienced surfers,” and I’m calling this one of the best windows in the whole forecast, as long as you can handle the size and the reef.
Sunday the 30th is another expert-only special. The morning shows 12 ft of groundswell at 16 seconds, but the wind is glassy – literally “glassy” (NNE, 3 mph). That’s a rare, pristine window. The energy is pumping at 5562. This is a clean, heavy swell. If you’ve got the stones, this is the session of the run.
After that, it’s a slow decline into mediocrity. Monday the 31st and Tuesday 1st September are blown out again with cross-onshore winds. The early part of September sees some big swells but poor conditions or the break being too big. The 5th of September has a 20 ft swell but the period drops to 10 seconds, so it’s shorter period, though the wind is offshore. Better for bigger boards.
Finally, around the 6th of September, the forecast shows a monster 28 ft swell (energy of 40399!) and a very long period of 17 seconds. The report calls it “too big for this break.” That’s a warning. Leave that one alone unless you’re a tow-surfer.
So the true standouts here: Saturday 29th August morning (clean, offshore, good size) and Sunday 30th August morning (glassy, powerful, for experts). Everything else is for the brave or the foolish.
The water temp anomaly is absent from the data, so no news there.
Stay safe out there. The reef doesn’t forgive.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Very mild (max 17°C on Tue morning, min 14°C on Sun afternoon). Winds increasing (light winds from the NW on Mon morning, fresh winds from the NW by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed morning. Warm (max 21°C on Fri afternoon, min 10°C on Fri morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
AM | 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 13 | SW 13 | SW 15 | SW 13 | SW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 16 | SW 18 |
Wave Graph | |||||||||||||||||||||
2318 | 2345 | 5187 | 3045 | 2207 | 2138 | 2981 | 3831 | 7310 | 19143 | 15372 | 10269 | 5785 | 4563 | 2561 | 1494 | 880 | 814 | 3330 | 5606 | 7356 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross | cross-off |
High Tide | 6:35AM0.90m | 7:24AM0.91m | 8:07AM0.91m | 8:49AM0.90m | 11:28PM0.59m | 9:30AM0.85m | 11:07PM0.60m | 10:11AM0.79m | 11:06PM0.63m | ||||||||||||
Low Tide | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | 4:41PM0.32m | 4:53PM0.34m | 2:29AM0.56m | 5:05PM0.37m | 3:35AM0.51m | 5:13PM0.41m | 4:35AM0.46m | |||||||||||
6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | |
— | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | |
mm | — | — | — | — | — | — | — | 4 | 7 | 2 | — | 1 | — | — | — | — | — | — | — | 2 | — |
Temp °C | 15 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 16 | 13 | 15 | 14 | 13 | 14 | 13 | 16 | 21 | 17 | 18 | 21 | 20 |
Feels °C | 11 | 9 | 10 | 11 | 10 | 11 | 11 | 11 | 14 | 10 | 11 | 10 | 7 | 8 | 7 | 12 | 18 | 13 | 15 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 15 | SW 13 | SW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 16 | SW 18 |
2318 | 2345 | 5187 | 3045 | 2207 | 2138 | 2981 | 3831 | 7310 | 19143 | 15372 | 10269 | 5785 | 4563 | 2561 | 1494 | 880 | 814 | 3330 | 5606 | 7356 | |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 16 | — | — | — | SW 16 | — | W 24 | WSW 21 | — | — | — | — | — | SW 21 | SW 20 | SW 20 | SW 18 | SW 20 | — | — |
448 | 1209 | — | — | — | 492 | — | 11 | 1032 | — | — | — | — | — | 18 | 15 | 60 | 370 | 753 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 12 | S 12 | — | — | — | — | — | — | — | SW 24 | SW 21 | — | — | — |
— | — | — | — | — | — | — | 3 | 11 | — | — | — | — | — | — | — | 23 | 224 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NW 5 | NW 6 | NNW 7 | — | — | — | — | — | — | SSE 6 | — | SSE 5 | SE 6 | ESE 5 | — | — |
— | — | — | — | — | 37 | 131 | 145 | — | — | — | — | — | — | 119 | — | 64 | 95 | 33 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 20 | 2 | 86 | 211 | 53 | 251 | 251 | 2 | 10 | 20 | 1 | 156 | 1797 | 31 | 0 | 1 | 325 | 0 | 1 | 216 |
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.











