Surf Forecasts:
Cobblestones surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 15ft (4.5m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 15ft (4.5m), 17s period, SW swell with 12,820 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 11PM (local time) - 15ft (4.5m), 17s 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 Sunday (Sep 06) at 11PM. The primary swell is predicted to be 4.5m and 17s period with a secondary swell of 0.4m and 11s. The wind is predicted to be cross-offshore 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 Sunday (Sep 06) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Sep 10) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Best Surf | 11PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Most Powerful | 8PM (Sun 6th Sep) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Righto, Rusty here. Let’s have a look at what’s coming down the line for Cobblestones.
This is a solid reef setup for advanced crew only, and it’s exposed to the swell with a sweet spot for SSW direction. The next couple of days are a write-off – Thursday and Friday are a messy, blown-out mess with strong onshore winds and poor conditions. Don’t even bother looking at it. The wait is worth it though, because from Monday morning (8th September) we get a window that cleans right up.
The real standout is Monday morning (8th September). The water is sitting at a touch warmer than normal for the time of year, about 65°F, with the anomaly just over a degree. The swell is a solid 13ft from the SW with a very long period of 17 seconds – proper groundswell energy. The combined swell energy is cranking at 10206 (strong). That’s an expert-only zone at that size, but the wind is a light, gentle offshore from the ESE. It’s going to be clean. If you’ve got the skills, that’s the session to target.
Another one to circle on the calendar is Wednesday morning (16th September). Another 13ft SW swell with a 17-second period and exceptional surf conditions. The combined energy is even bigger at 10692. Wind is a light cross-off from the NE, so the face should be lined up. Again, this is for the experienced chargers only – over 8ft is big territory.
Through the middle of the week there are some smaller but clean windows, like Tuesday morning (15th September) with 12ft from SW, period 15 seconds, and a light offshore from the ESE. That’s still a good wave, but the real power days are the standouts mentioned.
The second week drops off a bit in size and quality. Thursday and Friday (17th-18th September) see smaller 7ft to 8ft SW swells with clean offshore winds, but the energy is way down. Still rideable for the advanced crew, but nothing compared to the 8th and 16th.
Crowds at Cobblestones can be an issue sometimes, so get there early for the best of it.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Very mild (max 16°C on Thu afternoon, min 12°C on Sat night). Winds increasing (light winds from the WSW on Fri night, strong winds from the S by Sat night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 11°C on Sun night). Winds decreasing (fresh winds from the S on Sun afternoon, light winds from the SSW by Tue afternoon). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 14 | WSW 10 | SW 13 | SW 15 | SW 14 | WSW 14 | WSW 13 | SW 12 | WSW 13 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5956 | 5416 | 8058 | 9795 | 7811 | 4390 | 5027 | 7454 | 4915 | 11826 | 10431 | 7173 | 6128 | 5351 | 10206 | 8886 | 7664 | 5464 | 4471 | 3004 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross | cross-on | cross-on | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross | off | cross-off | cross | off |
High Tide | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | 6:53AM0.88m | 7:55AM0.87m | 00:50AM0.59m | 8:46AM0.83m | 11:34PM0.54m | ||||||||||||
Low Tide | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | 3:55PM0.19m | 4:26PM0.23m | 1:13AM0.59m | 4:50PM0.28m | 2:42AM0.51m | ||||||||||||
 |  | | |  |  | | |  | |  | | | | | | | | | | |
 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — |
mm | — | 2 | — | — | — | 2 | 2 | 5 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 14 | 14 | 16 | 16 | 13 | 14 | 15 | 12 | 13 | 15 | 13 | 16 | 19 | 17 | 14 | 18 | 18 |
Feels °C | 9 | 9 | 8 | 9 | 10 | 9 | 10 | 5 | 6 | 7 | 8 | 10 | 10 | 8 | 13 | 16 | 14 | 9 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | SW 18 | SW 13 | SW 15 | SW 14 | WSW 14 | — | WSW 22 | WSW 13 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 |
| kJ | 5956 | 463 | 8058 | 9795 | 7811 | 4390 | — | 46 | 4915 | 11826 | 10431 | 7173 | 6128 | 5351 | 10206 | 8886 | 7664 | 5464 | 4471 | 3004 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 21 | WSW 18 | — | S 11 | — | — | WSW 19 | SSE 11 | SSE 9 | — | — | SSE 9 | — | — | — | — | SW 26 | N 5 |
| kJ | — | — | 150 | 844 | — | 394 | — | — | 750 | 43 | 50 | — | — | 8 | — | — | — | — | 27 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 16 | — | — | — | — | S 13 | — | — | — | — | — | — | — | — | — | — | SW 26 |
| kJ | — | — | — | 80 | — | — | — | — | 14 | — | — | — | — | — | — | — | — | — | — | 26 |
Wind waves Height (m) Direction Period (s) | WNW 6 | WSW 10 | — | — | — | — | WSW 13 | SW 12 | S 9 | SSE 8 | — | — | — | — | — | — | — | NNE 4 | N 5 | — |
| kJ | 282 | 5416 | — | — | — | — | 5027 | 7454 | 575 | 385 | — | — | — | — | — | — | — | 15 | 19 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 359 | 688 | 2022 | 2 | 201 | 201 | 201 | 753 | 1689 | 89 | 0 | 1 | 31 | 1 | 0 | 0 | 0 | 53 | 26 | 0 |
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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