Surf Forecasts:
Cobblestones surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 5AM (local time) - 18ft (5.5m), 14s period, SW swell with onshore winds.
- Most powerful swell: Friday 4 Sep, 11AM (local time) - 20ft (6.0m), 16s period, SW swell with 17,749 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 6.0m 16s and forecast to arrive on Friday (Sep 04) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Saturday (Sep 05) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 2nd Sep) | 11ft (3.5m) 14s |
| Best Surf | 5AM (Fri 4th Sep) | 18ft (5.5m) 14s |
| Most Powerful | 11AM (Fri 4th Sep) | 20ft (6.0m) 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 on the table for the next couple of weeks.
We’re starting off with a bit of a rough patch, to be honest. The first few days look like a write-off. The wind is howling and the sea state is a mess. For the first couple of days, you’re battling what feels like a strong cross-onshore breeze and lumpy, choppy conditions. The swell is there, but it’s not surfable. It’s a frustrating start, so don’t even bother paddling out until we get past this.
The real action, and the standout of the whole period, is going to be Friday the 4th of September. Early morning at Cobblestones (reef). You’re looking at a solid 20 ft of swell thumping in from the southwest, with a very long period of 16 seconds. That’s proper groundswell, the kind that carries serious energy. The combined energy is a massive 17749 (strong to very strong wave energy). The wind is forecast to be onshore, but the tide is supposed to be favourable, and the wave comment says conditions are good. The sheer size of it means this is strictly for the experts only – this is not a day for a learner. Anyone else is going to get pounded. With that size and period, the reef at Cobblestones will be handling it beautifully, but you’ll need to be on your game.
The water temperature is sitting at 65°, which is about 2° warmer than normal for this time of year. It’s not a big anomaly, so it feels pretty average for the season.
After that monster Friday, the wind comes back with a vengeance over the weekend. Saturday the 5th is a total gale – 43 mph winds making it unsurfable. Sunday the 6th is a bit better, but the swell is still huge and the wind is messy.
The second week is where the forecast gets a bit more promising, but less certain. Tuesday the 8th of September looks like a real beauty. The swell drops to a more manageable 13 ft from the southwest, with a 16-second period. The wind is glassy from the north-northwest, so the surface will be like a mirror. The combined energy is still high at 7506 (strong wave energy). This is a classic Cobblestones day – clean, big, and powerful. It’s recommended for expert surfers, and for good reason.
Then, Thursday the 10th of September is another glassy morning. The swell is 13 ft from the west-southwest, with a 14-second period. The wind is dead calm, and the wave comment says “exceptional.” It’s a bit smaller than the Tuesday, but still a solid option for the crew who know what they’re doing.
Saturday the 12th of September morning is a sleeper. 13 ft of swell from the southwest, 16-second period, with a light cross-shore from the north-northwest. That’s a clean, lined-up wave. The crowd profile says “sometimes,” so it might get a bit busy, but with that level of quality, you don’t mind sharing.
The last window is Monday the 14th of September morning. A clean 10 ft from the southwest, 15-second period, with a light cross-offshore breeze from the north-northeast. It’s a smaller day, but the conditions will be crystal clear. A solid option for the tail end of the run.
Overall, the first week is a battle with the wind, but the second week offers some genuine gems. Keep your eyes on that Friday the 4th for the big one, and then Tuesday the 8th and Thursday the 10th for the glassy, clean sessions.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 18°C on Mon afternoon, min 13°C on Mon afternoon). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Wed night). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sat morning. Very mild (max 16°C on Thu afternoon, min 12°C on Sat morning). Winds increasing (light winds from the WSW on Fri afternoon, gales from the WSW by Sat morning). | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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 16 | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | WSW 14 | SW 12 | SW 13 | SW 14 | SW 15 | SW 16 |
Wave Graph | ||||||||||||||||||||
3152 | 4447 | 3361 | 3148 | 4194 | 4447 | 4082 | 5650 | 6044 | 4692 | 7637 | 17749 | 14817 | 8580 | 7898 | 9535 | 9718 | 9792 | 10943 | 10775 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | cross-on | glassy | cross-on | cross-on | on | on | cross-on | cross-on | on | on | cross-on | on | on | on |
High Tide | 11:33PM0.73m | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | 2:47AM0.85m | 5:24AM0.86m | |||||||||||||
Low Tide | 4:55PM0.49m | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | 1:59PM0.24m | 2:41PM0.19m | 3:20PM0.18m | ||||||||||||
— | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | |
mm | 2 | 1 | — | — | — | 1 | — | — | — | 1 | 1 | — | — | — | 4 | 4 | — | — | — | — |
Temp °C | 18 | 14 | 14 | 14 | 15 | 15 | 16 | 15 | 15 | 16 | 16 | 14 | 14 | 15 | 15 | 13 | 14 | 15 | 15 | 15 |
Feels °C | 12 | 8 | 10 | 10 | 10 | 10 | 12 | 13 | 10 | 9 | 8 | 7 | 10 | 8 | 6 | 0 | 2 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | — | SW 13 | SW 14 | SW 15 | SW 16 |
3152 | 4447 | 3361 | 3148 | 4194 | 4447 | 4082 | 5650 | 6044 | 4692 | 314 | 17749 | 14817 | 8580 | 4201 | — | 9718 | 9792 | 10943 | 10775 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 12 | S 12 | S 11 | S 11 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 280 | 180 | 85 | 85 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 6 | — | — | — | — | — | — | — | — | W 6 | SW 14 | — | — | — | WSW 14 | SW 12 | SW 13 | — | — | — |
268 | — | — | — | — | — | — | — | — | 300 | 7637 | — | — | — | 7898 | 9535 | 8562 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 359 | 2 | 2 | 2 | 89 | 2 | 2 | 0 | 251 | 411 | 1689 | 35 | 359 | 201 | 2675 | 1689 | 89 | 39 | 359 | 89 |
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.











