
Surf Forecasts:
Cobblestones surf forecast from 2 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, SW swell with 13,162 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 5AM (local time) - 13ft (4.0m), 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 Thursday (Sep 03) at 5AM. The primary swell is predicted to be 4.0m and 15s 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 1.0m 4s period and expected on Wednesday (Sep 09) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 3rd Sep) | 13ft (4.0m) 15s |
| 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, let’s break it down. The only spot firing in this window is Cobblestones. It’s a reef break, and it’s got a solid run of South-West swell coming through, but the wind is going to be a major player most days. The water is sitting at 65°F here, about a touch warmer than normal for this time of year, which is nice.
We start off this Thursday morning (Sept 3) with a chunky 13ft SW swell but it’s a cross-on wind mess. The energy is pumping at 6562, but it’s not clean. That afternoon stays ugly with 35 km/h cross-on wind. Friday morning (Sept 4) looks clean with offshore wind, 16ft SW swell, and a massive 8670 energy reading, but the wind is strong at 30 km/h – it’s going to be big and powerful, only for the experienced. Friday afternoon is the first real standout: 16ft from the WSW and a period of 15 seconds, with a 15 km/h offshore wind. The energy is huge at 11725, and it’s clean. That’s a proper session for the crew that can handle it.
Saturday (Sept 5) is a write-off – strong cross-on wind and messy. Sunday (Sept 6) morning has a 15ft SW swell, but the wind is cross-shore and lumpy. Sunday afternoon is interesting: 10ft but a 17-second period, very long groundswell, with energy at 9193. But it’s cross-shore and lumpy, so that long period might make it tricky at a beach break – Cobblestones is a reef, so it could actually line up well there.
Now, Monday (Sept 7) morning: 13ft SW, 16-second period, and a gentle cross-shore breeze. Energy at 7282. That’s clean, lined up, and powerful – a solid session for advanced surfers. Not the best of the window, but good.
The true standout is Tuesday (Sept 8). Both morning and afternoon are clean. Morning: 13ft SW, 16-second period, cross-off wind at 20 km/h, energy at 8995. Afternoon: 13ft SW, 17-second period, light breeze, energy at 9699. The swell is big (over 8ft), so this is expert territory, but the combination of big, long period groundswell, clean conditions, and a reef break setup is the best on offer. Crowds are possible there sometimes.
Wednesday (Sept 9) morning is the only other standout: 12ft WSW, 16-second period, gentle offshore wind at 15 km/h, and the notes say “exceptional surf conditions for expert surfers.” Energy at 5287. That’s another clean, powerful session.
After that, the swell drops off. The rest of the week (Sept 10 onward) is a mix of smaller, weaker swell with poor wind or chop. Some days have clean cross-off wind but the swell is only 7ft, so it’s not the same punch. Sept 11 and 12 are blown out with strong wind. Sept 13 to 16 are mostly marginal, with energy dropping to the 2000s and 4000s, and the wind rarely cooperating.
The real picks are Friday afternoon Sept 4, and Tuesday Sept 8. Both offer big, clean, long period swell with good wind. If you’re an expert, that’s your window.
Rusty
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Very mild (max 16°C on Thu morning, min 12°C on Sat night). Winds increasing (light winds from the NW on Thu morning, near gales from the S by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the SSE on Sun morning, light winds from the SSE by Tue afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 15 | SW 14 | WSW 11 | 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 16 | SW 17 | SW 16 | WSW 16 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||||
6562 | 4692 | 5841 | 8443 | 11593 | 7919 | 4067 | 5133 | 7751 | 6477 | 5051 | 10558 | 7173 | 6003 | 5948 | 8995 | 9699 | 7126 | 5287 | 4086 | 2736 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross | off | off | cross-on | 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 | 1:11PM0.31m | 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 | — | — | 6:35 | — | — | 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 | 16 | 15 | 13 | 14 | 15 | 16 | 13 | 14 | 15 | 12 | 14 | 16 | 13 | 15 | 19 | 17 | 15 | 18 | 18 |
Feels °C | 10 | 9 | 8 | 8 | 8 | 9 | 10 | 10 | 2 | 5 | 7 | 7 | 11 | 10 | 8 | 11 | 16 | 14 | 11 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 18 | SW 13 | WSW 15 | SW 14 | WSW 14 | — | WSW 22 | SW 13 | SW 12 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | SW 17 | SW 16 | WSW 16 | SW 15 | SW 15 |
6562 | 4692 | 392 | 8443 | 11593 | 7919 | 4067 | — | 46 | 6477 | 4142 | 10558 | 7173 | 6003 | 5948 | 8995 | 9699 | 7126 | 5287 | 4086 | 2736 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 21 | SSE 13 | — | S 11 | — | — | SW 19 | WSW 17 | SSE 8 | SSE 10 | — | SSE 9 | — | — | — | — | SW 26 | N 5 |
— | — | — | 227 | 56 | — | 482 | — | — | 863 | 5051 | 169 | 109 | — | 8 | — | — | — | — | 27 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 16 | — | — | — | — | — | — | SSE 11 | — | — | — | — | — | — | — | — | WSW 26 |
— | — | — | — | 76 | — | — | — | — | — | — | 39 | — | — | — | — | — | — | — | — | 65 | |
Wind waves Height (m) Direction Period (s) | — | WNW 6 | WSW 11 | — | — | — | NW 6 | WSW 13 | SW 12 | SSE 9 | — | — | — | — | — | — | — | — | NNE 4 | N 5 | — |
— | 232 | 5841 | — | — | — | 142 | 5133 | 7751 | 841 | — | — | — | — | — | — | — | — | 39 | 34 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 201 | 251 | 1689 | 2165 | 2 | 201 | 201 | 251 | 411 | 1689 | 89 | 0 | 0 | 35 | 0 | 1 | 0 | 0 | 0 | 35 | 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.










