
Surf Forecasts:
Cobblestones surf forecast from 4 Aug 2026:
- Best quality surf: Saturday 8 Aug, 8AM (local time) - 21ft (6.5m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Monday 10 Aug, 11PM (local time) - 21ft (6.5m), 18s period, SSW swell with 27,757 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 8AM (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 8AM. 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 6.5m 18s and forecast to arrive on Monday (Aug 10) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Best Surf | 8AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Most Powerful | 11PM (Mon 10th Aug) | 21ft (6.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Cobblestones.
Right off the bat, we’ve got a bit of a tricky one. The water’s sittin’ at 67°, which is a touch warmer than normal for this time of year – not a game changer, just somethin’ to note when you’re suitin’ up. The standout period is shaping up for Wednesday, August 5th, and Wednesday afternoon looks like our best bet across the whole outlook.
We kick off with Tuesday afternoon, August 4th, but honestly, it’s a write-off. The swell’s 12 ft from the WSW with a strong 16-second period, but that wind is howlin’ 16 mph from the west, cross-on, and just making a mess of things. It’s poor out there – don’t bother.
Now, Wednesday, August 5th, is where it gets interesting. The morning kicks off with a solid 16 ft swell from the SW, same long 16-second period. The wind is light, 9 mph from the WSW and actually offshore for Cobblestones, but the notes say the tide might be a bit sketchy so keep your wits about you. The combined swell energy is massive – 11376 – so there’s plenty of power.
But the real gem is Wednesday afternoon, August 5th. The swell holds at a pumping 16 ft from the WSW, still that lovely 16-second groundswell. The wind switches to a light 6 mph from the NW, putting it in a clean cross-shore position. There’s just a few light ripples on the water, making for proper clean conditions. The wave energy is even bigger at 11797. This is the session to circle on your calendar. For the more experienced crew, it’s going to be firing. If you’re new, that 16 ft might be a bit too much to handle.
Thursday, August 6th, the swell drops a touch to 13 ft, but the wind picks up. Morning sees 19 mph NW cross-shore winds and it starts getting lumpy. By the afternoon, the wind swings west and goes onshore at 19 mph, turning the place to slop.
From Friday, August 7th, through Monday, August 11th, it’s a long stretch of onshore and cross-on winds, mostly howling between 16 and 25 mph. The swell stays big – between 13 ft and 18 ft – but the wind just ruins it every time. Not worth paddling out unless you’re after a beating.
Saturday, August 8th, the swell actually jumps to a massive 23 ft from the SW with a 15-16 second period, and the energy is off the charts (21321 to 47838). But the wind is a strong 25 mph cross-on from the SW. It’s blown out and messy – this is more a kite day than a paddle day.
We get another blip on Saturday, August 15th, with an 18 ft swell from the SW and long period, but again the wind is onshore or cross-on and strong. The energy is huge (over 16000), but the ocean’s just too angry and messy for a decent paddle session.
The last chance for a half-decent look is Sunday, August 16th, into Monday, August 17th. The swell backs off to 13 ft-12 ft. On Sunday, the wind is a lighter 9 mph from the WNW, cross-on, making it choppy but not totally blown out. On Monday morning, we get an 12 ft SW swell with a cross-shore 19 mph NNW wind. It’s lumpy again, but if you’re desperate, you might find a corner.
After that, the wind turns onshore and strong again, and it’s all over. Wednesday, August 19th, has 28-31 mph winds. No go.
So, the bottom line: Wednesday afternoon, August 5th, is the standout. Clean 16 ft WSW swell, light cross-shore winds, and heaps of energy. Mark it down. Everything else is either blown out, too big, or just messy.
Stay stoked,
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu afternoon. Very mild (max 17°C on Wed night, min 14°C on Thu night). Winds increasing (light winds from the W on Wed afternoon, fresh winds from the WNW by Thu afternoon). | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Fri night. Very mild (max 16°C on Fri afternoon, min 10°C on Fri night). Winds decreasing (near gales from the SW on Fri night, moderate winds from the WSW by Sun morning). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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) | WSW 16 | WSW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 15 | SW 11 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 13 | SW 16 | SW 18 |
Wave Graph | ||||||||||||||||||||
6972 | 6251 | 11376 | 11797 | 10867 | 8684 | 8513 | 8603 | 6670 | 6963 | 7394 | 21321 | 24265 | 21264 | 13154 | 9472 | 8152 | 7274 | 14236 | 22975 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross | cross | cross | on | on | on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:06AM0.78m | 3:03AM0.84m | 4:24AM0.90m | 5:45AM0.95m | 6:51AM1.00m | 7:46AM1.03m | ||||||||||||||
Low Tide | 5:15PM0.53m | 2:30PM0.46m | 2:35PM0.36m | 3:09PM0.28m | 3:46PM0.22m | 4:24PM0.20m | 5:00PM0.20m | |||||||||||||
— | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | |
5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | |
mm | — | — | 2 | 2 | 4 | 1 | 5 | — | 1 | 1 | 7 | 3 | 2 | — | — | 1 | 2 | — | — | — |
Temp °C | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 16 | 15 | 16 | 14 | 12 | 13 | 14 | 15 | 15 | 16 | 13 | 14 | 14 |
Feels °C | 10 | 11 | 12 | 15 | 12 | 11 | 11 | 11 | 10 | 10 | 5 | 1 | 4 | 8 | 10 | 9 | 8 | 6 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | — | — | — | SW 16 | SW 17 | SW 16 | SW 16 | — | — | SW 16 | SW 18 |
6972 | 6251 | 11376 | 11797 | 10867 | 8684 | 8513 | 8603 | 6670 | — | — | — | 24265 | 21264 | 13154 | 9472 | — | — | 14236 | 22975 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 224 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WSW 15 | SW 11 | SW 15 | SW 16 | — | — | — | SW 15 | SW 13 | — | — |
— | — | — | — | — | — | — | — | — | 6963 | 7394 | 21321 | 23573 | — | — | — | 8152 | 7274 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 359 | 89 | 2 | 25 | 86 | 212 | 251 | 64 | 38 | 359 | 411 | 2004 | 2004 | 35 | 2 | 1340 | 89 | 89 | 89 | 20 |
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.











