
Surf Forecasts:
Cobblestones surf forecast from 7 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 2PM (local time) - 13ft (4.0m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 13ft (4.0m), 16s period, SW swell with 8,888 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 2PM (local time) - 13ft (4.0m), 16s 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 Tuesday (Sep 08) at 2PM. The primary swell is predicted to be 4.0m and 16s period. 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 4.0m 16s and forecast to arrive on Tuesday (Sep 08) at 11AM. 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 6s period and expected on Tuesday (Sep 08) at 5PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Tue 8th Sep) | 13ft (4.0m) 16s |
| Best Surf | 2PM (Tue 8th Sep) | 13ft (4.0m) 16s |
| Most Powerful | 11AM (Tue 8th Sep) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into the Cobblestones outlook. This is a heavy, exposed reef, so it’s one for the advanced crew only. The swell energy is going to be massive, so we’re calling this one for the experts.
We’ve got a solid run of surf starting from Tuesday the 8th of September. The water temp is about average for the time of year, so nothing wild there. The early-morning session on Tuesday has a clean 13.1ft SW groundswell, with a very long 16-second period, pumping out strong wave energy (8888). The wind is a cross-off from the ESE at 12 mph, which will keep the faces tidy. This is a serious standout for the experienced surfer. The afternoon holds, with a 13.1ft WSW swell and a cross-off breeze, still exceptional quality.
Wednesday the 9th brings a smaller but still chunky 9.8ft SW swell, with an offshore ENE wind at 16 mph in the morning. That’s a clean, powerful combo, though the energy is still high (4187). The afternoon glass-off with a 3 mph cross-off from the east is a dream setup for a late session.
Thursday the 10th sees the swell drop to 6.9ft, but the afternoon is pure magic. The wind goes glassy, just a slight air from the WNW, and the swell is a clean 6.9ft SW with a 15-second period – that’s a very long period groundswell, perfect for a reef like this. The energy is moderate (2232). This is your best bet for the lighter days.
Into Friday the 11th, the swell drops to 5.2ft but the period jumps to 19 seconds – that’s incredibly long. Morning is clean with a light cross-off, but the afternoon gets a bit tricky with a cross-shore and 9.8ft swell. The energy is still strong (5177).
Saturday the 12th is a write-off. Strong cross-onshore winds and messy surf. Sunday the 13th is also poor with onshore winds and rain. This is a dead zone for quality surfing.
Monday the 14th brings a 11.5ft WSW swell with a 14-second period. The wind is light and cross, so the wave quality is marginal but surfable. The energy is high (5499). This is a go for the experienced, but conditions are not perfect.
Tuesday the 15th is onshore again, so look elsewhere. From Wednesday the 16th through to the end of the period, the winds turn mostly cross-onshore, and the swell stays big, but the quality is poor. The standout remains the Tuesday morning and Wednesday afternoon of the first week. The real highlight, though, is the Thursday afternoon glass-off session – with the wind dropping to nothing, a 6.9ft very long-period swell, and the reef doing its thing, that’s the one to circle on your calendar.
Short Range ForecastMostly dry. Very mild (max 19°C on Tue afternoon, min 11°C on Tue morning). Winds decreasing (fresh winds from the SSE on Mon night, calm by Thu afternoon). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Sat morning. Very mild (max 18°C on Fri morning, min 14°C on Thu night). Winds increasing (light winds from the ESE on Thu night, strong winds from the NNW by Fri night). | ||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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 16 | SW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 15 | WSW 15 | WSW 19 | WSW 18 | WSW 16 | WSW 16 | W 10 | W 10 | WSW 13 | WSW 13 | WSW 13 |
Wave Graph | |||||||||||||||||||
7617 | 8888 | 7354 | 5703 | 4187 | 3622 | 2525 | 1785 | 1860 | 1953 | 1879 | 5132 | 4136 | 2386 | 1867 | 2210 | 4130 | 3912 | 4105 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | off | cross-off | off | cross-off | glassy | off | cross-off | cross | cross | cross-on | cross-on | cross-on | on | on | glassy |
High Tide | 7:55AM0.87m | 00:50AM0.59m | 8:46AM0.83m | 11:34PM0.54m | 9:30AM0.77m | 10:58PM0.54m | 10:08AM0.69m | 10:34PM0.56m | 10:39AM0.60m | 10:24PM0.61m | 11:00AM0.51m | 10:28PM0.67m | |||||||
Low Tide | 4:26PM0.23m | 1:13AM0.59m | 4:50PM0.28m | 2:42AM0.51m | 5:02PM0.34m | 3:34AM0.45m | 4:57PM0.40m | 4:22AM0.40m | 4:28PM0.44m | 5:12AM0.37m | 3:38PM0.43m | ||||||||
— | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | |
6:05 | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | 2 | 1 | — |
Temp °C | 13 | 16 | 19 | 15 | 15 | 19 | 19 | 16 | 18 | 17 | 18 | 17 | 18 | 17 | 17 | 16 | 16 | 15 | 15 |
Feels °C | 7 | 11 | 15 | 10 | 10 | 15 | 16 | 12 | 15 | 16 | 16 | 15 | 10 | 8 | 9 | 9 | 9 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 15 | WSW 15 | WSW 14 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 13 | WSW 13 |
7617 | 8888 | 7354 | 5703 | 4187 | 3622 | 2525 | 1785 | 1860 | 1953 | 1723 | 5132 | 4136 | 2386 | 1412 | 850 | 1051 | 3912 | 4105 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | SE 7 | WSW 26 | SW 24 | SW 22 | SW 21 | WSW 19 | SE 13 | SSE 12 | SSE 12 | S 11 | W 18 | — | WSW 16 | — |
— | — | — | — | — | 23 | 65 | 271 | 372 | 458 | 1879 | 45 | 15 | 13 | 3 | 321 | — | 950 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNE 6 | SW 26 | SE 8 | N 6 | S 11 | S 11 | — | — | — | — | S 11 | — | — | — |
— | — | — | — | — | 12 | 103 | 29 | 15 | 58 | 21 | — | — | — | — | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SE 5 | SSE 6 | SE 7 | NE 6 | — | NE 5 | NNE 6 | — | — | — | — | NW 5 | W 8 | W 10 | W 10 | WSW 13 | — | — |
— | 65 | 111 | 123 | 25 | — | 18 | 33 | — | — | — | — | 65 | 832 | 1867 | 2210 | 4130 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 21 | 0 | 0 | 0 | 16 | 201 | 1346 | 1900 | 251 | 2371 | 2 | 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.










