Surf Forecasts:
Cobblestones surf forecast from 30 Aug 2026:
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 13ft (4.0m), 19s period, WSW swell with 12,075 kJ wave energy.
Best Forecast Surf Conditions for Cobblestones this week:
The most powerful waves expected at Cobblestones in the next 16 days are 4.0m 19s and forecast to arrive on Sunday (Sep 06) at 8PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 6th Sep) | 13ft (4.0m) 19s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’ve only got one spot on the radar for the next couple of weeks, and that’s Cobblestones. The first chance for a wave is Sunday afternoon, the 30th of August. We’ve got a solid 3.0m swell from the WSW, but it’s coming in at a very long 16 seconds. That period means the energy is deep and powerful, but at a reef break like Cobblestones, this longer period groundswell will actually help the wave stand up and shape up nicely. The wind is a light NW breeze at 6 mph, keeping things cross-shore with just a bit of texture, not ruinous. Water temp is 65°, which is a touch warmer than normal for this time of year, so it’s pleasant enough. This is the best on offer for the whole outlook – a rare standout where the power is real and the conditions are workable.
The combined swell energy is a massive 4844 (moderate to strong for this setup), so don’t be fooled by the “marginal” note in the data; the energy is there, it’s just a bit tricky with the long period. This is not a beginner wave at 3.0m over a reef – keep it for the advanced crew. The optimum swell direction is SSW, and this forecast is WSW, which is a little off, but still works for the break’s exposure.
After that Sunday session, the forecast gets messy. Monday the 31st sees winds swing to a strong WNW at 16 mph, turning cross-onshore and choppy. The swell drops to 2.5m but the quality plummets. Through the first week of September, we have a run of onshore and cross-onshore winds with lumpy, messy conditions. The surf size fluctuates from 3.0m up to 5.0m, but the wind is consistently poor. Tuesday the 1st has a rare moment of offshore wind at 9 mph, but the data calls the surf marginal at best for this break.
There’s a real gap in quality. The combined swell energy reads three-digit values (3148 to 5493) for the next few days, but the wind just kills the potential. Then on Friday the 4th of September, the swell jumps to 5.0m from the WSW with a 16-second period – that’s a serious amount of water moving. Energy hits 12569 (very strong), but the wind is still cross-onshore at only 9 mph, so it’s fairly choppy, not clean. The system is clearly pushing a lot of power, but the window for a proper wave is narrow.
The true promise shows up again on Monday the 7th of September morning. We see a 5.0m SW swell, 17-second period, and clean offshore wind from the WSW at 9 mph. Energy is 12728 (very strong). This is expert territory only – over 2.5m on a reef with that kind of power is no joke. The data notes that the swell might be too big for this break, so be very selective. The afternoon of the 7th stays clean but the swell holds at 4.5m from the SW.
Then, the absolute best session of the entire forecast: Tuesday the 8th of September morning. Clear skies, offshore cross-off wind from the north at 9 mph, and a 4.5m SW swell with a solid 16-second period. The combined energy is 10420 (very strong). The data flags this as exceptional for expert surfers. This is the true standout. Clean, powerful, long-period groundswell hitting a reef with offshore wind – that’s as good as it gets for the advanced crew.
Wednesday the 9th holds similar quality: 5 to 5.0m WSW swell, 16 seconds, clean cross-off winds from the north-northeast at 12 mph. Energy sits around 10559 to 12327. This is a solid second option, but the Tuesday morning is the winner.
After the 9th, the wind starts to turn more cross-shore and then cross-onshore again, and the swell stays big but messy. There’s a gap of poor to marginal conditions from the 10th of September through to the end of the outlook on the 14th, with onshore winds and too much size for comfort. Nothing worth a long drive.
So, the call is simple: you’ve got a few fleeting, high-quality windows at Cobblestones, but they’re all for expert surfers only. The Tuesday the 8th of September morning is the absolute standout. The water is a touch warm, the power is deep and the wind is clean. Don’t miss it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon afternoon. Very mild (max 18°C on Mon afternoon, min 13°C on Mon afternoon). Winds increasing (light winds from the WNW on Sun night, fresh winds from the WNW by Mon afternoon). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Sat afternoon. Very mild (max 16°C on Thu afternoon, min 13°C on Fri morning). Winds increasing (light winds from the SW on Wed night, strong winds from the W by Thu night). | ||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 17 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | WSW 14 | SW 13 | SW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 |
Wave Graph | |||||||||||||||||||
3822 | 3700 | 3152 | 4700 | 3361 | 3023 | 3601 | 3668 | 3566 | 4529 | 5191 | 4843 | 6425 | 6952 | 8200 | 6493 | 4097 | 2665 | 2499 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 11:15PM0.67m | 11:39AM0.61m | 11:33PM0.73m | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | |||||||||||
Low Tide | 5:41AM0.44m | 4:55PM0.49m | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | |||||||||||
— | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | |
6:00 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | |
mm | — | — | 2 | 1 | — | — | — | 1 | 1 | — | — | — | 2 | — | — | — | 2 | 2 | 10 |
Temp °C | 17 | 17 | 18 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 14 | 13 | 13 | 15 | 16 | 14 |
Feels °C | 17 | 13 | 12 | 8 | 10 | 10 | 10 | 11 | 11 | 13 | 10 | 10 | 8 | 7 | 8 | 10 | 8 | 8 | 4 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 18 | SW 13 | SW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 |
3822 | 3700 | 3152 | 4700 | 3361 | 3023 | 3601 | 3668 | 3566 | 4529 | 5191 | 4843 | 258 | 6952 | 8200 | 6493 | 4097 | 2665 | 2499 | |
Swell 2 Height (m) Direction Period (s) | WSW 20 | — | — | — | — | — | — | — | — | — | — | — | — | SSE 12 | S 13 | S 15 | S 12 | S 10 | SW 24 |
441 | — | — | — | — | — | — | — | — | — | — | — | — | 29 | 166 | 233 | 314 | 175 | 22 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 16 | S 16 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 90 | 126 | — | |
Wind waves Height (m) Direction Period (s) | — | W 5 | WSW 6 | — | — | — | — | — | — | — | — | — | WSW 14 | — | — | — | — | — | S 7 |
— | 53 | 257 | — | — | — | — | — | — | — | — | — | 6425 | — | — | — | — | — | 363 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 201 | 35 | 2 | 2 | 2 | 89 | 359 | 2 | 2 | 172 | 359 | 1689 | 1783 | 2 | 201 | 201 | 251 | 411 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











