Surf Forecasts:
Cobblestones surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 11AM (local time) - 20ft (6.0m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 18ft (5.5m), 18s period, SW swell with 19,038 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 11AM (local time) - 20ft (6.0m), 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 Friday (Sep 04) at 11AM. The primary swell is predicted to be 6.0m 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 5.5m 18s and forecast to arrive on Monday (Sep 07) at 8PM. 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+) | 11AM (Fri 4th Sep) | 20ft (6.0m) 15s |
| Best Surf | 11AM (Fri 4th Sep) | 20ft (6.0m) 15s |
| Most Powerful | 8PM (Mon 7th Sep) | 18ft (5.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Right, mates, Rusty here with a look at what’s coming down the line. We’ve only got one spot on the radar for this whole period, and that’s Cobblestones, a heavy, advanced reef break. This place doesn’t mess around.
We’re kicking off with a solid, long-period groundswell already in the water. On Tuesday the 1st, it’s a clean 10 ft from the WSW with a really long 15-second period, and the wind is a clean offshore. The energy is absolutely pumping (3361). It’s a lot of swell, so this is expert territory right from the start. The water temp is about average for this time of year, nothing wild.
Wednesday the 2nd gets a bit bigger, up to 12 ft, but the wind swings onshore and gets messy. Not your day. Thursday the 3rd is a write-off with 13 ft swell and howling onshore winds – that’s kite-surfing weather, not paddle-surfing weather. Friday the 4th is a monster. We’re looking at a massive 20 ft swell from the SW, with a 16-second period. The combined energy is off the charts (16354). The wind is favorable, but honestly, for a reef break at this size, it’s just too big. This is only for the absolute elite, and even then, it’s a serious call.
Saturday the 5th is blown out by a near-gale, so forget it. Sunday the 6th and Monday the 7th hang in there with 15 to 16 ft swells, but winds are still a problem, making it look marginal.
Now, here’s the standout. Tuesday the 8th. The swell drops to a still-hefty 13 ft from the SW, but the period stays very long at 16 seconds. The real magic is the wind: glassy. Dead flat, offshore, perfect conditions. The forecast says “exceptional surf conditions for expert surfers,” and they’re not kidding. This is your window if you’ve got the skills and the nerve. It’s a big, powerful groundswell, so it’ll be better on the point and reef sections than straight beach breaks. Expect crowds possible at this spot.
Wednesday the 9th sees a 10 ft swell but the wind cranks offshore from the NNE, which cleans it up nicely for the morning. It’s still a good session for the strong paddler. The afternoon gets bigger again (13 ft) but with a cross-shore wind.
From Thursday the 10th onwards, it’s a long stretch of poor conditions. The wind is all over the place and the swell is either too big or too messy. There are a few days around the 14th and 15th where the swell drops to a more manageable 8 to 8 ft, but the wind is onshore and choppy, so the quality just isn’t there. You’re looking at a solid gap of a week or more with nothing good to recommend.
If you’re a pro on twin fins and don’t mind a beating, get on that Tuesday the 8th session. For the rest of us, this 16-day run is a pick-and-choose game, and mostly a miss.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed morning. Very mild (max 16°C on Thu afternoon, min 14°C on Mon night). Winds increasing (light winds from the SW on Wed night, fresh winds from the WNW by Thu afternoon). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sat afternoon. Very mild (max 16°C on Thu night, min 13°C on Fri morning). Winds increasing (light winds from the WSW on Fri afternoon, near gales from the WSW by Sat afternoon). | ||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 12 | SW 15 | SW 16 | SW 15 | SW 14 | SW 12 | SW 13 | WSW 14 | WSW 15 | SW 16 |
Wave Graph | |||||||||||||||||||
4447 | 3361 | 3148 | 4194 | 4447 | 4122 | 5377 | 6044 | 5957 | 6664 | 15581 | 16354 | 9011 | 5046 | 10439 | 9520 | 8069 | 10041 | 10663 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 11:33PM0.73m | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | ||||||||||||
Low Tide | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | ||||||||||||
— | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | |
6:00 | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | |
mm | — | — | — | — | 1 | 1 | — | — | 1 | 3 | — | — | — | 2 | 7 | — | — | — | — |
Temp °C | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 13 | 13 | 15 | 16 | 14 | 14 | 15 | 15 | 14 |
Feels °C | 9 | 10 | 9 | 10 | 10 | 10 | 12 | 9 | 8 | 8 | 5 | 9 | 9 | 6 | 2 | 2 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 18 | SW 15 | SW 16 | SW 15 | SW 14 | — | SW 13 | WSW 14 | WSW 15 | SW 16 |
4447 | 3361 | 3148 | 4194 | 4447 | 4122 | 5377 | 6044 | 5957 | 197 | 15581 | 16354 | 9011 | 5046 | — | 9520 | 8069 | 10041 | 10663 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 11 | S 10 | S 10 | SSE 10 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 358 | 284 | 214 | 104 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WNW 5 | SW 12 | — | — | — | WNW 7 | SW 12 | SW 13 | — | — | — |
— | — | — | — | — | — | — | — | 126 | 6664 | — | — | — | 807 | 10439 | 8617 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 89 | 2 | 2 | 2 | 212 | 359 | 1689 | 2167 | 2544 | 201 | 2669 | 2684 | 89 | 2 | 159 | 35 |
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.











