Surf Forecasts:
Cobblestones surf forecast from 1 Sep 2026:
- Best quality surf: Monday 7 Sep, 2PM (local time) - 16ft (5.0m), 17s period, SW swell with onshore winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 18ft (5.5m), 17s period, SW swell with 16,937 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 2AM (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 Thursday (Sep 03) at 2AM. 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 5.5m 17s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Saturday (Sep 05) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 3rd Sep) | 11ft (3.5m) 14s |
| Best Surf | 2PM (Mon 7th Sep) | 16ft (5.0m) 17s |
| Most Powerful | 5PM (Mon 7th Sep) | 18ft (5.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a look at what's shaping up for Cobblestones. This is a reef break that needs a solid SSW swell to really go off, and boy, we've got a big window of energy coming, but it's gonna take some patience.
The immediate outlook is a bit frustrating. We’re looking at a long wait for the stars to align. There’s a massive pulse of swell building, but for the first week or so, the wind is a total mess. From Tuesday through to the following Monday, it’s a write-off. We’re seeing strong onshore and cross-onshore winds, with speeds hitting 15 to 25 mph, and even a near gale on the 5th. That’s just blown-out, choppy chaos. The swell is huge, jumping from 10 ft to a massive 18 ft, but without the right wind, it’s a washing machine. The combined wave energy is through the roof, but it’s all for nothing.
The first real glimmer of hope comes on the morning of Monday the 8th. The wind goes completely glassy, dead calm, and the swell drops to a much more manageable 12 ft. The period is a solid 15 seconds, so it’s a proper groundswell with some real grunt. This is a window for the experts. That size is still big, so it’s not for the faint of heart, but the conditions will be clean. The water temp is about 65°, which is pretty normal for this time of year.
The next standout is shaping up for the morning of Tuesday the 15th. We’ve got a 15 ft swell from the SSW, which is spot-on for this break, with a 15-second period. The wind is a light offshore from the ENE, promising clean, lined-up waves again. This is another expert-only session due to the size.
There’s a few other mornings, like the 6th, 7th, and the 14th, where the wind is good but the swell is just too big for the conditions to be perfect, or the tide might be messing with it. The 7th afternoon in particular has an 18 ft swell with a 17-second period, and the file says it might just be too big, even for this break.
So, to keep it simple: the first week is a total loss. The best bet is the morning of the 8th, with glassy conditions and a big, powerful swell. Then, keep an eye on the morning of the 15th for another dose of clean, offshore conditions and solid SSW groundswell. Both are strictly for the experienced crew.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed morning. Very mild (max 16°C on Wed afternoon, min 14°C on Tue morning). Winds increasing (calm on Wed night, strong winds from the WSW by Thu night). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 16°C on Sat morning, min 12°C on Sat afternoon). Winds increasing (light winds from the WSW on Fri afternoon, gales from the WSW by Sat afternoon). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | WSW 14 | SW 14 | SW 16 | SW 15 | WSW 14 | WSW 11 | SW 13 | WSW 13 | WSW 16 | WSW 16 | SW 16 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3361 | 3148 | 4194 | 4447 | 4332 | 5302 | 6044 | 5875 | 7986 | 10521 | 13237 | 7839 | 3633 | 9329 | 10386 | 8359 | 11247 | 11317 | 13506 | 16937 | 10265 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | glassy | cross-on | cross-on | on | cross-on | on | cross-on | cross | cross-on | cross-on | on | on | cross-on | on | on | glassy |
High Tide | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | 6:53AM0.88m | ||||||||||||||
Low Tide | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | 3:55PM0.19m | ||||||||||||||
 |  |  |  |  |  | |  |  | | | | |  | | | |  | | | | |
 | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — |
mm | — | — | — | 1 | 1 | — | — | — | 2 | — | — | — | 2 | 7 | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 15 | 16 | 15 | 15 | 16 | 16 | 14 | 13 | 14 | 16 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 15 |
Feels °C | 11 | 9 | 10 | 10 | 12 | 12 | 10 | 9 | 8 | 7 | 8 | 10 | 6 | 1 | 2 | 8 | 10 | 12 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 18 | SW 14 | SW 16 | SW 15 | WSW 14 | — | SW 22 | WSW 13 | WSW 16 | WSW 16 | SW 16 | SW 17 | SW 16 |
| kJ | 3361 | 3148 | 4194 | 4447 | 4332 | 5302 | 6044 | 5875 | 314 | 10521 | 13237 | 7839 | 3633 | — | 19 | 8359 | 11247 | 11317 | 13506 | 16937 | 10265 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WSW 22 | — | — | S 12 | — | S 11 | SSE 11 | SSE 9 | SSE 10 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 181 | — | — | 661 | — | 202 | 469 | 265 | 60 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WSW 14 | — | — | — | NW 7 | WSW 11 | SW 13 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 7986 | — | — | — | 567 | 9329 | 10386 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 39 | 89 | 359 | 20 | 0 | 201 | 359 | 1689 | 2167 | 2 | 201 | 2671 | 630 | 688 | 2 | 89 | 64 | 2 | 20 | 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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