
Surf Forecasts:
Cobblestones surf forecast from 6 Sep 2026:
- Best quality surf: Sunday 6 Sep, 5PM (local time) - 15ft (4.5m), 17s period, SW swell with cross-shore winds.
- Most powerful swell: Sunday 6 Sep, 5PM (local time) - 15ft (4.5m), 17s period, SW swell with 10,921 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 5PM (local time) - 15ft (4.5m), 17s 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 Sunday (Sep 06) at 5PM. The primary swell is predicted to be 4.5m and 17s period with a secondary swell of 3.0m and 18s. Another secondary swell of 2.1m and 7s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 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 1.8m 6s period and expected on Tuesday (Sep 08) at 5PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Best Surf | 5PM (Sun 6th Sep) | 15ft (4.5m) 17s |
| Most Powerful | 5PM (Sun 6th Sep) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get stuck into what's cookin' for our local patch.
The whole 16-day window is a bit of a rollercoaster, but we've got some serious juice coming in. The real standout is a very specific window where the stars align for the experts.
Our main break is Cobblestones, a powerful reef setup that demands respect. It's an exposed spot, so it catches everything. The water temp is sitting at 65°F, which is a touch warmer than we'd normally expect for this time of year.
We kick things off on Sunday, the 6th of September, but it's a rough start. A solid 13ft SSW swell is hammering the coast, but it's coming with a fresh 19 mph cross-shore wind. The water is a lumpy mess. The afternoon gets even bigger, pushing 15ft with a 17-second period. The combined energy is massive at 16260, but it's simply too big for this break. Not the day for a paddle.
Monday the 7th is a different story. The morning is where it's at. The swell drops to a still-chunky 12ft from the SW, with a 16-second period (groundswell for sure). The wind swings to a light cross-offshore breeze at 9 mph, and the conditions clean right up. The energy is still pumping at 6877. This is exceptional surf, but make no mistake, at 12ft over a reef, this is for expert surfers only. The afternoon wind picks up again, so that morning session is the clear window.
Tuesday the 8th is another solid day. The swell holds at 13ft from the SW, with a 16-second period. The wind is light and cross-offshore again, making for clean waves. The energy is massive at 9039. This is a top-tier call for big-wave chargers. The afternoon is more of the same with a lighter breeze – an all-day session for the brave.
Wednesday the 9th sees the swell ease a touch to 10ft, but the wind turns offshore from the ENE in the morning at 19 mph. That's a clean, hollow look. The period drops to 15 seconds, still a solid groundswell. The morning is glassy and clean, but a fresh offshore can make the paddle out at a reef a battle. The afternoon is lighter with a 6 mph NE breeze, which is excellent for the more experienced crew.
Thursday the 10th is a definite drop-off. The swell is down to 7ft, the energy is moderate at 2046, and the wind is a messy cross-offshore. The quality is marginal.
From Friday the 11th all the way through to Sunday the 20th of September, it's a grim run. The wind goes onshore or cross-onshore for days, turning the ocean into a washing machine. There's a lot of rain and strong wind. The swell is still there, but the quality is poor. For a few days there, with that much swell and strong onshore wind at a beach-and-reef setup, this looks more interesting for the kite surfers than for us with a paddle.
You'll want to circle Monday the 14th of September. The wind drops right out, swinging to a light northerly cross-offshore. The swell is 12ft from the SW with a 14-second period. The energy is still chunky at 4998. The morning will be clean and powerful. It's for experienced surfers, but it's the best call in a long, rough stretch.
The very end of the forecast, around Friday the 18th and Saturday the 19th, is a massive warning. We're looking at an 18ft to 20ft SW swell with an insane energy reading of 27239. The wind is onshore, and it's going to be a dangerous, chaotic mess. Stay well clear of the water those days.
So, to sum it up: the standout is the morning of Monday the 7th of September – a clean, 12ft groundswell with light winds for the experts. A very close second is the entire day of Tuesday the 8th. After that, it's a waiting game until Monday the 14th for a much smaller window of clean conditions.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 20°C on Tue afternoon, min 10°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 20°C on Wed afternoon, min 10°C on Wed morning). Winds increasing (light winds from the NE on Thu night, fresh winds from the W by Fri night). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | WSW 16 | WSW 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 |
Wave Graph | |||||||||||||||||||||
4595 | 10921 | 9898 | 6877 | 6307 | 7277 | 9039 | 7961 | 5703 | 4257 | 3622 | 2525 | 1761 | 1626 | 1604 | 1512 | 3129 | 4086 | 3569 | 4188 | 5120 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross | off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:53AM0.88m | 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 | ||||||||||
Low Tide | 3:20PM0.18m | 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 | ||||||||||
6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | |
— | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 1 | 1 |
Temp °C | 15 | 16 | 12 | 15 | 17 | 13 | 15 | 20 | 16 | 14 | 20 | 19 | 16 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 |
Feels °C | 7 | 8 | 6 | 12 | 12 | 7 | 10 | 16 | 11 | 8 | 17 | 16 | 11 | 16 | 16 | 17 | 15 | 14 | 13 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | WSW 16 | WSW 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | — |
4595 | 10921 | 9898 | 6877 | 6307 | 7277 | 9039 | 7961 | 5703 | 4257 | 3622 | 2525 | 1761 | 1626 | 1604 | 1512 | 3129 | 4086 | 3569 | 4188 | — | |
Swell 2 Height (m) Direction Period (s) | SW 19 | SW 18 | SSE 10 | — | — | — | — | — | — | SSE 7 | ESE 7 | SW 26 | SW 24 | SW 22 | SW 21 | WSW 19 | WSW 13 | — | — | — | — |
730 | 4908 | 78 | — | — | — | — | — | — | 30 | 27 | 104 | 271 | 375 | 361 | 1255 | 1042 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 26 | — | SE 8 | S 12 | NNE 5 | S 11 | S 11 | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 27 | — | 14 | 103 | 8 | 37 | 9 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 8 | SSE 7 | — | — | SE 10 | SE 5 | SE 5 | SE 6 | SE 7 | NE 5 | — | NNE 4 | NNE 6 | N 6 | — | — | — | W 4 | W 6 | — | WSW 14 |
588 | 431 | — | — | 25 | 66 | 83 | 209 | 85 | 22 | — | 13 | 50 | 30 | — | — | — | 21 | 100 | — | 5120 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1689 | 64 | 1 | 0 | 35 | 1 | 1 | 0 | 0 | 13 | 0 | 0 | 44 | 20 | 0 | 2 | 220 | 251 | 875 | 359 | 251 |
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.










