Surf Forecasts:
Cobblestones surf forecast from 1 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) - 16ft (5.0m), 17s period, WSW swell with 13,356 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 11PM (local time) - 11ft (3.5m), 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 Wednesday (Sep 02) at 11PM. The primary swell is predicted to be 3.5m and 14s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 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 0.7m 4s period and expected on Wednesday (Sep 09) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 2nd Sep) | 11ft (3.5m) 14s |
| Best Surf | 11PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Most Powerful | 8PM (Sun 6th Sep) | 16ft (5.0m) 17s |
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 got a solid 16-day window to look at for Cobblestones, and I’m telling you, there’s some serious energy on the table. This is an advanced reef break, and it’s exposed to the swell, so when it’s on, it’s on. The water is sitting at 66°, which is a touch warmer than normal for this time of year – not a huge deal, but nice if you’re not wearing a thick suit.
The first few days are a write-off for any kind of decent surf. We’ve got solid swell coming in, but the wind is just trash. Wednesday the 2nd through Saturday the 5th, the wind is either onshore or cross-onshore and strong. Swell is big – 12ft to 16ft – but it’s all messy and blown out. The combined energy is massive (4447 to 11425), but with that wind, you’d be a fool to paddle out. The setup looks more interesting for kite surfing than paddle surfing.
Sunday the 6th and Monday the 7th are still marginal. The swell stays big (13ft to 16ft) and the wind is cross-shore, so it’s lumpy and not great. The energy is still high (6346 to 12417), but the quality isn’t there for a good session.
Now, here’s the standout. Tuesday morning, the 8th of September. This is the one. We’ve got a 13ft SW swell with a very long period of 17 seconds. The combined energy is 8345 – that’s strong. But the real story is the wind: glassy. Dead calm. For an exposed reef like Cobblestones, that’s about as good as it gets. The conditions are exceptional for expert surfers, and the sets will be long, powerful, and clean. This is the day to clear your schedule. Crowds are a possibility here sometimes, so get in early. The long period means it’ll be a groundswell, so expect long waits between sets, but the shape on the reef will be world-class.
The rest of the second week is a mixed bag. Wednesday the 9th stays clean with offshore winds and 8ft to 10ft swell, but the energy drops off (2803 to 3227). It’s good for experienced surfers, but not the standout. Thursday the 10th through Monday the 14th is mostly a write-off again, with onshore winds and choppy conditions. The swell is still there, but the wind just kills it.
Tuesday the 15th morning, we get another glassy window with a 10ft SW swell and 13-second period. The energy is moderate (3280), and conditions are excellent for experienced surfers. It’s not as big or powerful as the 8th, but it’ll be clean and fun.
Finally, Wednesday the 16th brings an 12ft SW swell with a very long 18-second period, and energy at 7312. The wind is light cross-onshore, so it’s not perfect, but it’s still worth a look for those who can handle a bit of texture.
To sum it up: the 8th of September is the clear winner. Glassy conditions, big swell, and a long period. Don’t miss it. The 9th and 15th are good backup days. The rest is either blown out or marginal. Keep an eye on the forecasts, because things can change.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Very mild (max 16°C on Wed morning, min 14°C on Wed night). Winds increasing (calm on Wed night, strong winds from the W by Thu night). | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Sat afternoon. Very mild (max 16°C on Sat morning, min 11°C on Mon morning). Winds decreasing (near gales from the SSW on Sat afternoon, light winds from the ESE by Sun night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
AM | 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) | SW 13 | SW 13 | SW 14 | SW 15 | WSW 14 | WSW 10 | SW 13 | WSW 15 | SW 14 | WSW 14 | WSW 13 | SW 12 | SW 13 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 17 | WSW 16 | WSW 15 |
Wave Graph | |||||||||||||||||||||
4447 | 4332 | 5878 | 6587 | 6221 | 5124 | 8574 | 11346 | 7717 | 4924 | 5143 | 8047 | 7748 | 11876 | 11648 | 7715 | 6346 | 5669 | 8345 | 6662 | 4431 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross | cross-off | glassy | cross | off |
High Tide | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | 6:53AM0.88m | 7:55AM0.87m | 00:50AM0.59m | ||||||||||||||
Low Tide | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | 3:55PM0.19m | 4:26PM0.23m | 1:13AM0.59m | |||||||||||||
6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | |
mm | 2 | — | — | — | — | 3 | — | — | — | 2 | 5 | 4 | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 16 | 16 | 16 | 15 | 14 | 15 | 16 | 16 | 13 | 14 | 15 | 13 | 13 | 15 | 13 | 15 | 17 | 16 |
Feels °C | 11 | 12 | 12 | 11 | 8 | 8 | 8 | 10 | 10 | 9 | 8 | 1 | 6 | 7 | 9 | 10 | 10 | 8 | 14 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 14 | SW 15 | WSW 14 | SW 18 | SW 13 | WSW 15 | SW 14 | WSW 14 | S 11 | WSW 22 | SW 13 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 17 | WSW 16 | WSW 15 |
4447 | 4332 | 5878 | 6587 | 6221 | 318 | 8574 | 11346 | 7717 | 4924 | 292 | 47 | 7748 | 11876 | 11648 | 7715 | 6346 | 5669 | 8345 | 6662 | 4431 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 12 | S 16 | S 15 | S 12 | — | — | SW 18 | — | S 11 | SSE 8 | — | SSE 10 | — | — | — |
— | — | — | — | — | — | 29 | 79 | 70 | 529 | — | — | 1000 | — | 22 | 67 | — | 9 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 6 | WSW 10 | — | — | — | — | WSW 13 | SW 12 | S 9 | S 9 | — | — | — | — | — | — | — |
— | — | — | — | 324 | 5124 | — | — | — | — | 5143 | 8047 | 1032 | 541 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 411 | 31 | 0 | 201 | 251 | 688 | 1134 | 38 | 220 | 201 | 251 | 1689 | 1783 | 31 | 0 | 1 | 31 | 0 | 0 | 31 | 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.











