Surf Forecasts:
Cobblestones surf forecast from 27 Aug 2026:
- Best quality surf: Saturday 29 Aug, 11PM (local time) - 10ft (3.0m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 30 Aug, 5AM (local time) - 11ft (3.5m), 18s period, SW swell with 7,252 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 2PM (local time) - 10ft (3.0m), 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 Saturday (Aug 29) at 2PM. The primary swell is predicted to be 3.0m and 17s period with a secondary swell of 0.1m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 3.5m 18s and forecast to arrive on Sunday (Aug 30) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Friday (Aug 28) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 29th Aug) | 10ft (3.0m) 17s |
| Best Surf | 11PM (Sat 29th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 5AM (Sun 30th Aug) | 11ft (3.5m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day folks, Rusty here. We’ve got a mixed bag on the cards at Cobblestones over the next couple of weeks – a real tale of two forecasts. The water temp is sitting at 65°, which is a touch warmer than usual for this time of year. Let’s get into it.
The first decent window kicks off Friday morning, 28 August. It’s not the cleanest start, but there’s a solid 8ft SW swell (moderate energy of 1630) with a 12-second period and a cross-offshore wind. The conditions are clean, though the commentary warns of marginal surf or questionable tide. It’s an advanced-only reef, so you’ll need your wits about you. The real standout though? Saturday afternoon, 29 August. We’ve got a gorgeous 10ft SW groundswell, a 17-second period (that’s a very long period, so the sets will be meaty and the paddling out will have longer lulls), and a light offshore breeze at just 3 mph. That’s glassy, clean, and the wave energy is pumping (5223). It’s exceptional for experts.
Sunday morning, 30 August, is almost as good – a touch bigger at 12ft SW, with a 17-second period and a cross-offshore breeze. The energy is strong (6797). This is the other true standout; it’s powerful and clean. However, by Sunday afternoon, the wind shifts cross-shore and it gets a bit lumpy.
From Monday, 31 August, things turn ugly. A strong cross-onshore wind kicks in, and the swell hangs around but the quality disappears. It’s messy, choppy, and blown-out for several days straight. We’re looking at a big gap with no good surf from Monday morning through to Friday afternoon, 4 September – about four days of poor conditions where you’d be better off doing something else. If you’re a kite surfer, these big onshore and cross-onshore swells with strong winds might look more interesting than paddling out.
Saturday, 5 September, is a write-off with gale-force winds. There’s a small improvement on Sunday morning, 6 September, with a clean 5ft WSW swell and a cross-off breeze, but it’s not a standout.
Looking further out, the swell really kicks up again in the second week. Wednesday, 9 September, features a massive 16ft WSW swell with clean cross-offshore wind in the morning – but that’s far too big for anyone except absolute experts, and the commentary warns it’s predicted to be too big for this break. The energy is enormous (18970). That theme continues Thursday, 10 September, with 21ft WSW groundswell, but onshore winds ruin it. It’s a promising but less certain long-range event – a proper big-wave session for the crew with huge cojones, but only if the wind plays ball. After that, the swell remains solid but the winds are messy again through to 12 September.
So, to cut it short: the best on offer is Saturday afternoon, 29 August and Sunday morning, 30 August at Cobblestones – both clean, powerful SW groundswells with good winds. After that, it’s pretty grim until the massive mid-September pulse, which is only for the brave.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sat afternoon, min 11°C on Fri morning). Winds decreasing (fresh winds from the SSE on Fri afternoon, calm by Sun night). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Very mild (max 18°C on Mon morning, min 13°C on Mon night). Winds increasing (light winds from the S on Tue morning, fresh winds from the W by Wed afternoon). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | SW 16 | WSW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
Wave Graph | |||||||||||||||||||||
1591 | 822 | 506 | 2325 | 5223 | 6314 | 6797 | 4844 | 4108 | 4222 | 4267 | 5089 | 3326 | 2626 | 1922 | 3499 | 4805 | 5404 | 4623 | 4207 | 3385 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | off | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on |
High Tide | 9:30AM0.85m | 11:07PM0.60m | 10:11AM0.79m | 11:06PM0.63m | 10:54AM0.71m | 11:15PM0.67m | 11:39AM0.61m | 11:33PM0.73m | 12:35PM0.51m | 11:57PM0.78m | 00:29AM0.82m | 1:15AM0.84m | |||||||||
Low Tide | 5:05PM0.37m | 3:35AM0.51m | 5:13PM0.41m | 4:35AM0.46m | 5:13PM0.46m | 5:41AM0.44m | 4:55PM0.49m | 7:07AM0.42m | 3:46PM0.49m | 10:34AM0.40m | 1:11PM0.31m | ||||||||||
6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | |
— | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | 1 | 2 | — | — | 1 |
Temp °C | 13 | 16 | 12 | 16 | 19 | 16 | 18 | 19 | 17 | 18 | 18 | 13 | 14 | 14 | 14 | 15 | 16 | 16 | 14 | 14 | 16 |
Feels °C | 8 | 10 | 7 | 12 | 18 | 13 | 16 | 17 | 18 | 15 | 13 | 7 | 10 | 9 | 9 | 8 | 9 | 9 | 8 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 17 | SW 17 | WSW 16 | WSW 16 | WSW 17 | WSW 16 | SW 16 | WSW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
1591 | 822 | 506 | 2325 | 5223 | 6314 | 6797 | 4844 | 4108 | 4222 | 4267 | 5089 | 3326 | 2626 | 1922 | 3499 | 4805 | 5404 | 4623 | 4207 | 3385 | |
Swell 2 Height (m) Direction Period (s) | WSW 20 | SW 20 | SW 18 | SW 19 | — | — | — | — | WSW 20 | — | — | — | — | — | — | — | — | — | — | — | — |
39 | 60 | 323 | 1185 | — | — | — | — | 441 | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | SW 23 | SW 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 84 | 365 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | SSE 5 | SE 6 | SE 5 | SSE 5 | SE 6 | — | — | — | WNW 4 | W 6 | — | — | — | — | — | — | — | — | — | — |
66 | 106 | 47 | 57 | 36 | 31 | — | — | — | 11 | 149 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 25 | 1 | 0 | 0 | 1 | 0 | 38 | 2 | 201 | 359 | 20 | 2 | 2 | 64 | 251 | 2014 | 1689 | 2 | 359 | 201 |
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.











