
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, 8AM (local time) - 13ft (4.0m), 16s period, SW swell with 9,039 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 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 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 | 8AM (Tue 8th Sep) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s coming up. The first surf worth paddling out for is on September 7th, so we’ve got a bit of a wait. After that, there's a solid run of days, but a few rough patches in between.
The standout is going to be Cobblestones. It’s an advanced reef break, so not one for the beginners, and it’s consistent when it fires. The water’s sitting at 64.8°F with a 2.0°F anomaly, so it’s a touch warmer than normal for this time of year, which is a nice bonus.
We kick off on Monday afternoon, September 7th. It’s going to be a bit messy with a 18.6 mph cross-shore wind and a 11.5 ft SW swell. The combined energy is pretty strong, sitting at 6332, but the wind is lumpy and the conditions are marginal, so it’s not the best start.
Tuesday, September 8th, is where it picks up. The morning is clean with a 12.4 mph cross-offshore ESE wind and a 13.1 ft SW swell. The wave energy is huge, hitting 8888, and the period is a very long 16 seconds, so this is proper groundswell. That long period will make it peel nicely at a reef setup like this, and the wind will keep it tidy. Tuesday afternoon is equally good, with lighter 9.3 mph cross-offshore wind and the same 13.1 ft SW swell. This is the real standout window—clean, powerful, and for expert surfers only. Expect a crowd sometimes, but with quality this good, it’ll be worth it.
Wednesday, September 9th, is still solid but steps down a touch. A 9.8 ft SW swell with a 15-second period, and a fresh 18.6 mph offshore wind in the morning keeps it clean, but the afternoon eases into lighter 6.2 mph cross-offshore wind under some clouds. Still very good, experienced surfers will have fun.
Thursday, September 10th, sees the swell drop to 6.9 ft but with a 15-second period keeping the quality high. The morning has a 12.4 mph offshore wind, but the real gem is the afternoon—glassy conditions with 3.1 mph wind from the NNW. That’s as clean as it gets, and the 6.9 ft SW swell will be super tidy. Combined energy is 2255, so moderate but well-shaped.
Friday, September 11th, offers a mix. The morning has a 6.2 mph cross-shore wind and a 6.9 ft WSW swell, but it’s light and rideable. The afternoon picks back up with a 9.8 ft WSW swell and an even longer 18-second period, giving it proper punch, though it’s a bit cross-shore with 9.3 mph wind.
Now, we hit a rough spell from Saturday, September 12th, through Sunday, September 13th. The wind swings onshore and cross-onshore, blowing 21.7 to 28.0 mph, and the swell is messy and lumpy. The combined energy is still high, between 3904 and 4998, but it’s blown out. Honestly, the setup looks more interesting for kite surfing than paddle surfing during this stretch. No recommendations here.
Monday, September 14th, brings a return of clean conditions. The morning has a 6.2 mph cross-offshore wind and a 11.5 ft WSW swell with a 14-second period, and the energy is strong at 5194. This is solid, well-shaped surf for experts. The afternoon gets a light cross-onshore, so morning is the window.
Tuesday, September 15th, drops to 9.8 ft and then 8.2 ft SW swell with increasing cross-shore wind, so it’s only marginal by the afternoon.
Wednesday, September 16th, is back up to 11.5 ft SW swell in the morning, but with a cross-onshore wind, so it’s a bit choppy. The energy is 6525, but the quality isn’t there.
Thursday, September 17th, has 9.8 ft and 11.5 ft WNW swell, but the period drops to 8 seconds—short period windswell, meaning it’ll be soft and crumbly. Not the best.
Now, a future standout to watch: Friday, September 18th. The morning brings a massive
Short Range ForecastMostly dry. Very mild (max 19°C on Tue afternoon, min 9°C on Wed morning). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Sat morning. Very mild (max 18°C on Thu afternoon, min 15°C on Thu night). Winds increasing (calm on Thu afternoon, strong winds from the WNW by Sat morning). | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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 16 | SW 16 | SW 16 | SW 16 | WSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 15 | WSW 15 | WSW 14 | WSW 18 | WSW 16 | WSW 16 | W 10 | W 10 | WSW 11 | WSW 12 | WSW 13 |
Wave Graph | ||||||||||||||||||||
6307 | 7370 | 8888 | 7961 | 5703 | 4187 | 3622 | 2525 | 1785 | 1860 | 1927 | 1746 | 5132 | 4402 | 2386 | 2508 | 2058 | 3818 | 4772 | 4751 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | off | off | cross-off | off | off | glassy | off | cross | cross | cross-off | cross-on | cross-on | cross-on | cross-on | on | cross |
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 | 3:55PM0.19m | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | — | — | — | 1 | — |
Temp °C | 17 | 13 | 15 | 19 | 15 | 15 | 19 | 19 | 15 | 18 | 16 | 17 | 18 | 18 | 16 | 17 | 16 | 17 | 17 | 15 |
Feels °C | 12 | 7 | 10 | 15 | 10 | 9 | 15 | 16 | 11 | 16 | 14 | 16 | 16 | 11 | 8 | 9 | 9 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 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 17 | WSW 12 | WSW 13 |
6307 | 7370 | 8888 | 7961 | 5703 | 4187 | 3622 | 2525 | 1785 | 1860 | 1927 | 1746 | 5132 | 4402 | 2386 | 1393 | 1474 | 657 | 4772 | 4751 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 7 | SE 8 | SW 24 | SW 22 | SW 21 | WSW 19 | — | — | SE 12 | S 12 | WSW 18 | — | WSW 16 | — |
— | — | — | — | — | — | 33 | 9 | 271 | 372 | 463 | 1592 | — | — | 6 | 3 | 263 | — | 226 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 26 | WSW 26 | S 12 | N 5 | S 11 | S 11 | — | — | — | — | S 11 | — | — | — |
— | — | — | — | — | — | 27 | 65 | 108 | 14 | 58 | 21 | — | — | — | — | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 10 | — | SE 5 | SE 6 | SE 7 | NE 6 | — | NNE 5 | NNE 6 | SE 8 | — | — | — | NW 5 | W 8 | W 10 | W 10 | WSW 11 | — | — |
25 | — | 60 | 165 | 127 | 30 | — | 15 | 33 | 23 | — | — | — | 54 | 1533 | 2508 | 2058 | 3818 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 35 | 1 | 1 | 0 | 0 | 13 | 0 | 0 | 0 | 0 | 0 | 28 | 201 | 53 | 1797 | 1797 | 251 | 1340 | 2003 | 0 |
Best forecast wave conditions in Margaret River | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










