Surf Forecasts:
Cobblestones surf forecast from 11 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 5AM (local time) - 11ft (3.5m), 14s period, SW swell with offshore winds.
- Most powerful swell: Saturday 19 Sep, 2AM (local time) - 15ft (4.5m), 15s period, WSW swell with 10,328 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 5AM (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 Tuesday (Sep 15) at 5AM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 0.4m and 19s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 4.5m 15s and forecast to arrive on Saturday (Sep 19) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 15th Sep) | 11ft (3.5m) 14s |
| Best Surf | 5AM (Tue 15th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 2AM (Sat 19th Sep) | 15ft (4.5m) 15s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Right now, it’s looking like a bit of a frustrating wait before we see anything worthwhile. For the next couple of days, we’ve got plenty of size but dirty, choppy conditions that just aren’t going to deliver. From Saturday the 14th, things start to clean up, and we’ve got a run of decent surf ahead, but you’ll need to pick your moments.
The standout window is Tuesday the 15th. Cobblestones is an advanced reef break, and it’s exposed to the swell. We’ve got a solid long-period groundswell from the SW rolling in, around 10ft, with a period of 14 seconds. That’s proper energy (combined swell energy at 3898). The real kicker is the wind: glassy offshore from the ENE, light at 6 mph. That means clean, lined-up waves. The size is big, so this is only for experienced surfers. Keep in mind, with that long period, the sets will be widely spaced, and it can wall up a bit at a reef setup like this, but the quality should be excellent.
Look, Monday the 14th isn’t bad either. The swell holds at 13ft from the SW, with the same long 14-second period. The morning has cross-offshore winds from the SE at 9 mph, keeping it clean. It’s powerful and big (combined energy of 6088), so again, not for the faint of heart. A solid option for the advanced crew.
Towards the back end of the forecast, there’s a real gem potentially lining up for Tuesday the 22nd. This is two weeks away, so treat it as promising but not locked in. The call is for a 13ft SW swell, 15-second period, with light cross-offshore winds from the ESE at 6 mph. That’s exceptional conditions for expert surfers (combined energy of 7187). If it comes together, it could be the pick of the whole period, but we’ll have to watch it.
A quick word on the water: For a spot like Cobblestones, it’s about average for this time of year.
Thursday the 19th is worth a mention, but with a big caveat. The early morning shows a massive 18ft SW swell, but the wind is a fresh cross-onshore at 22 mph, making it lumpy. It’ll be big, challenging, and more of a spectacle than a clean paddle.
From the 23rd onward, the winds get a bit messy again with onshore components, so consistency drops off. The big swell is still around, but the quality will be hard to find.
So, to sum it up: forget the first few days. Your best bets are Tuesday the 15th for clean, powerful waves, and keep an eye on that Tuesday the 22nd in the long range.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Very mild (max 18°C on Fri night, min 12°C on Mon morning). Winds decreasing (strong winds from the WNW on Fri night, light winds from the S by Mon afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | W 17 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 12 | WSW 14 | WSW 14 | WSW 13 | WSW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 7024 | 2386 | 1972 | 3446 | 3159 | 5681 | 5804 | 6077 | 5602 | 4796 | 3898 | 3420 | 2293 | 1226 | 603 | 961 | 1028 | 987 | 1703 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | off | cross-on | off | cross-off | cross | cross-off | cross | cross-off | cross-off |
High Tide | 10:34PM0.56m | 10:39AM0.60m | 10:24PM0.61m | 11:00AM0.51m | 10:28PM0.67m | 10:57AM0.43m | 10:43PM0.72m | 9:41AM0.38m | 11:04PM0.76m | 11:28PM0.79m | 11:55PM0.81m | ||||||||
Low Tide | 4:22AM0.40m | 4:28PM0.44m | 5:12AM0.37m | 3:38PM0.43m | 6:09AM0.37m | 2:41PM0.40m | 7:39AM0.38m | 2:06PM0.35m | 2:02PM0.31m | 2:13PM0.28m | |||||||||
 |  |  |  |  | |  | | |  | | | | | | | | | | |
 | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — |
 | 6:07 | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — |
mm | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 |
Temp °C | 18 | 15 | 16 | 16 | 16 | 17 | 17 | 14 | 17 | 15 | 18 | 20 | 19 | 20 | 22 | 21 | 18 | 19 | 18 |
Feels °C | 14 | 7 | 11 | 11 | 11 | 12 | 14 | 10 | 14 | 11 | 16 | 18 | 15 | 16 | 19 | 21 | 19 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | — | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 12 | WSW 14 | WSW 14 | WSW 13 | WSW 12 |
| kJ | — | 2386 | 1972 | 3446 | 3159 | 5681 | 5804 | 6077 | 5602 | 4796 | 3898 | 3420 | 2293 | 1226 | 603 | 961 | 1028 | 987 | 1703 |
Swell 2 Height (m) Direction Period (s) | — | — | S 11 | WSW 19 | WSW 17 | — | — | W 24 | — | — | — | — | SSE 8 | S 13 | WSW 16 | S 13 | S 12 | SW 18 | WSW 15 |
| kJ | — | — | 2 | 274 | 798 | — | — | 11 | — | — | — | — | 6 | 215 | 441 | 121 | 42 | 316 | 874 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 22 | WSW 21 | ESE 8 | S 11 | S 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 18 | 42 | 6 | 9 | 2 |
Wind waves Height (m) Direction Period (s) | W 17 | WSW 10 | WSW 10 | — | — | — | — | — | — | — | SE 6 | — | NE 4 | NNE 5 | N 6 | NNW 4 | NNW 4 | NW 6 | — |
| kJ | 7024 | 1925 | 1601 | — | — | — | — | — | — | — | 51 | — | 12 | 98 | 64 | 16 | 40 | 161 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 251 | 875 | 1797 | 201 | 359 | 359 | 20 | 1 | 1 | 7 | 0 | 1 | 0 | 38 | 53 | 0 | 53 | 53 | 159 |
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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