Surf Forecasts:
Cobblestones surf forecast from 2 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 16ft (5.0m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 5PM (local time) - 16ft (5.0m), 17s period, SW swell with 14,334 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 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Saturday (Sep 05) at 11AM.
| 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) | 16ft (5.0m) 17s |
| Most Powerful | 5PM (Sun 6th Sep) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve got a look at what’s coming up for Cobblestones. This is an advanced reef break that loves a good SSW swell, and it’s looking like a wild ride for the next couple of weeks, but only if you pick your moments. The water is sitting at 65.5°F, which is a touch warmer than normal for this time of year—nothing crazy, but you’ll notice it.
The first real surf on offer starts Wednesday the 2nd of September, but it’s a rough start. Wednesday morning brings a solid 11.5ft SW swell, with a 13-second period, but the wind is howling onshore from the SW at 16 mph, and the combined energy is massive at 4447. The conditions are poor, and the score is a flat zero. Wednesday afternoon isn’t much better—11.5ft SW swell, cross-on wind, and the energy is still high at 4332. It’s marginal at best, with choppy, messy waves. Thursday the 3rd builds to 13.1ft SW swell with a 15-second period, but the wind is cross-on and fresh at 19 mph, energy at 6607, and it’s a total write-off. Friday the 4th gets even bigger—18.0ft WSW swell on Friday morning, but the wind is cross-on at 16 mph, and the energy is through the roof at 10100. Still poor. Friday afternoon, however, brings a shift: the wind switches to onshore from the WSW at 9 mph, the swell drops to 16.4ft from the WSW with a 15-second period, and the energy hits 12490. The score jumps to a 7, and it’s described as marginal due to tide, but the wind is light and onshore, so it’s actually clean. That’s a standout window for the brave—big, powerful waves, but the period is long, so this reef will handle it well.
The weekend is a mess. Saturday the 5th has a 11.5ft SW swell with a 14-second period, but the wind is cross-on and fresh at 22 mph, and the energy is 4842. Then Saturday afternoon is blown out with a 16.4ft SW swell and 34 mph near gale cross-onshore winds. Sunday the 6th is better: the swell is 14.8ft from the SW with a 13-second period, the wind is cross-shore at 19 mph, and the energy is 8367. It’s marginal, scoring a 6, with lumpy cross-chop. Sunday afternoon sees a 16.4ft SW swell with a very long 17-second period, cross-shore wind at 16 mph, and energy at 14334, scoring a 7. The waves will have power, but the long period might make the reef a bit tricky.
Now, the real gem is Tuesday the 8th of September. Tuesday morning is absolutely the pick of the whole forecast. The swell is 13.1ft from the SW with a 16-second period, and the wind is cross-offshore from the ESE at 6 mph, light and clean. The energy is 8429, and the conditions are described as exceptional for expert surfers, scoring a 9. This is the one to circle—big, clean groundswell, light offshore wind, and the reef will be firing. Tuesday afternoon drops to a 7, with a gentle cross-shore breeze, but still decent.
Wednesday the 9th through Thursday the 10th sees the swell dropping to 9.8ft and 8.2ft, with cross-offshore or cross-shore winds, but the scores are low (2-4). Not worth paddling out for.
Friday the 11th brings another pulse: 14.8ft WSW swell with a 17-second period, but the wind is onshore at 16 mph, energy at 11273, and it’s poor. Friday afternoon is 16.4ft WSW, cross-on wind, scoring a 6—marginal and choppy.
Saturday the 12th to Sunday the 13th is small stuff, 8.2ft to 11.5ft, with light winds and scores of 3-5. Nothing to get excited about.
Monday the 14th sees a 14.8ft WSW swell with a 15-second period, cross-shore wind at 16 mph, energy at 8660, scoring a 7. It’s moderate and choppy, but worth a look.
Now, the last week gets wild. Tuesday the 15th of September: the swell hits 26.2ft from the WSW, with a 14-second period, and the energy is a staggering 25277. The wind is light cross-onshore, but the comment says it’s too big for this break and scores an 11. That’s expert-only territory, and even then, it’s a monster. Wednesday the 16th is still massive—19.7ft to 18.0ft WSW swell, energy up to 20838
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Very mild (max 16°C on Wed morning, min 13°C on Fri afternoon). Winds increasing (calm on Wed night, strong winds from the W by Thu night). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Sat afternoon. Very mild (max 16°C on Sat morning, min 11°C on Sun night). Winds decreasing (near gales from the S on Sat afternoon, light winds from the ESE by Mon morning). | ||||||||||||||||||||
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 | SW 14 | WSW 11 | WSW 14 | WSW 15 | SW 14 | SW 14 | SW 10 | SW 12 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
4447 | 4332 | 5961 | 6587 | 4692 | 5949 | 10071 | 12322 | 7611 | 4378 | 4688 | 7789 | 7165 | 14334 | 11074 | 7715 | 6537 | 5924 | 8429 | 7995 | 6481 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | cross-off | cross-off | 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 | 11 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 16 | 16 | 16 | 15 | 14 | 15 | 16 | 12 | 14 | 14 | 15 | 13 | 12 | 15 | 14 | 15 | 19 | 17 |
Feels °C | 11 | 11 | 12 | 11 | 8 | 8 | 8 | 9 | 9 | 9 | 2 | 3 | 7 | 8 | 9 | 9 | 10 | 10 | 12 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 14 | SW 15 | SW 14 | SW 18 | WSW 14 | WSW 15 | SW 14 | SW 14 | — | WSW 22 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | SW 16 | SW 16 |
4447 | 4332 | 5961 | 6587 | 4692 | 392 | 10071 | 12322 | 7611 | 4378 | — | 47 | 7165 | 14334 | 11074 | 7715 | 6537 | 5924 | 8429 | 7995 | 6481 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 12 | S 13 | — | S 12 | — | — | SW 18 | — | S 8 | — | — | SSE 9 | — | — | — |
— | — | — | — | — | — | 29 | 89 | — | 464 | — | — | 1202 | — | 121 | — | — | 8 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 16 | — | — | — | — | — | — | S 11 | — | — | — | — | — | — |
— | — | — | — | — | — | — | 79 | — | — | — | — | — | — | 57 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | WNW 4 | WNW 6 | WSW 11 | — | — | — | NW 7 | SW 10 | SW 12 | — | — | — | — | — | — | — | — | — |
— | — | — | 20 | 263 | 5949 | — | — | — | 305 | 4688 | 7789 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1340 | 31 | 2 | 201 | 251 | 688 | 2007 | 2 | 201 | 201 | 2787 | 1689 | 89 | 89 | 0 | 1 | 35 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











