Surf Forecasts:
Cobblestones surf forecast from 9 Aug 2026:
- Best quality surf: Monday 10 Aug, 11PM (local time) - 20ft (6.0m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 21ft (6.5m), 16s period, SW swell with 21,719 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 11PM (local time) - 20ft (6.0m), 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 Monday (Aug 10) at 11PM. The primary swell is predicted to be 6.0m and 16s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 6.5m 16s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Saturday (Aug 15) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 10th Aug) | 20ft (6.0m) 16s |
| Best Surf | 11PM (Mon 10th Aug) | 20ft (6.0m) 16s |
| Most Powerful | 2AM (Tue 11th Aug) | 21ft (6.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here, looking at the forecast for Cobblestones. This is a reef break, a real high-performance wave that demands respect, and it’s only for the advanced crew. The water is sitting at 68° right now, which is much warmer than we’d normally expect for this time of year.
Right off the bat, we’ve got a big gap with no surf. The first proper window doesn’t open up until Wednesday the 12th. The early week is a write-off – big, messy, cross-onshore winds and a massive 15 to 18 ft swell with moderate wave energy (4930 to 9672) are making a mess of things. Not worth looking at.
Wednesday the 12th offers a glimmer. We’ve got a solid 13 ft swell from the SW, with a period of 14 seconds. The wind turns onshore, but it’s a gentle breeze. It’s a marginal call with questionable tide conditions, but it’s the first sign of life. The energy is moderate (7030).
The real standout starts shaping up on Thursday the 13th. The swell holds at 13 ft from the SW, and the period stretches to 15-17 seconds. That’s a proper groundswell. The wind is light, swinging cross-onshore in the morning but going glassy onshore in the afternoon. This is the best bet of the first week. The energy is strong (7329-9772).
Friday the 14th is another good day. The swell drops to a still-chunky 12 ft from the SW, with a 16-second period. The wind goes clean and cross-offshore from the NE. The energy is moderate (6461). This is a solid call for the experts.
We then hit a lull from the 15th through the 17th, with smaller, cleaner waves but much lower energy.
Looking into the second week, there’s a promising but less certain window on Saturday the 22nd. The swell is a more manageable 10-12 ft from the SW, with a 15-16 second period. The wind goes glassy – dead calm. That’s a major positive. The energy is moderate (4111-5464). If the forecast holds, that’s a day for the connoisseur.
Monday the 24th afternoon gets a mention. The swell is 15 ft from the WSW with a 16-second period. The energy is very strong (19207), and the wind is light onshore. It might be a bit too big, but it’s on the radar.
This is Cobblestones, though. It’s a consistent break, but it’s heavy and exposed. Don’t expect it to be easy. The two days that look the most promising are Thursday the 13th and Saturday the 22nd. Keep an eye on that Saturday slot.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Mon afternoon. Very mild (max 15°C on Tue afternoon, min 10°C on Mon afternoon). Winds decreasing (strong winds from the SW on Mon morning, calm by Wed night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sat afternoon, min 11°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 11 | SW 12 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4930 | 9672 | 21719 | 17353 | 13612 | 9286 | 7008 | 6538 | 6550 | 7329 | 9772 | 8549 | 6461 | 5476 | 3757 | 2380 | 1874 | 1968 | 4324 | 3501 | 2913 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | on | cross-off | cross-off | cross | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:35AM1.02m | 9:17AM0.98m | 9:55AM0.92m | 10:26AM0.82m | 00:30AM0.56m | 10:47AM0.72m | 00:00AM0.59m | 10:48AM0.62m | 11:55PM0.64m | ||||||||||||
Low Tide | 5:00PM0.20m | 5:34PM0.24m | 6:03PM0.29m | 6:23PM0.35m | 6:25PM0.42m | 3:53AM0.53m | 6:01PM0.46m | 5:05AM0.52m | 5:10PM0.47m | ||||||||||||
 | |  |  |  |  | | | | | | | | | |  | | | | | | |
 | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — |
mm | 3 | 4 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 15 | 15 | 17 | 18 | 18 | 17 | 19 | 18 |
Feels °C | 5 | 0 | 4 | 7 | 8 | 11 | 10 | 11 | 11 | 12 | 12 | 12 | 10 | 12 | 13 | 12 | 13 | 16 | 11 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 15 | WSW 14 | WSW 15 |
| kJ | — | — | 19260 | 17353 | 13612 | 9286 | 7008 | 6538 | 6550 | 7329 | 9772 | 8549 | 6461 | 5476 | 3757 | 2380 | 1874 | 1968 | 4324 | 3501 | 2913 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 24 | SW 22 | — | — | — | — | — | — | — | — | — | S 10 | WSW 24 | WSW 22 | WSW 19 |
| kJ | — | — | — | — | — | — | 22 | 163 | — | — | — | — | — | — | — | — | — | 17 | 55 | 317 | 2258 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 11 | SW 12 | SW 16 | — | — | — | — | — | — | — | — | — | — | — | — | N 5 | N 6 | N 5 | N 4 | N 4 | N 4 |
| kJ | 4930 | 9672 | 21719 | — | — | — | — | — | — | — | — | — | — | — | — | 63 | 89 | 25 | 14 | 17 | 30 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 875 | 2671 | 89 | 89 | 325 | 2 | 2 | 2 | 2 | 2 | 2 | 0 | 0 | 15 | 0 | 53 | 53 | 0 | 165 | 86 | 53 |
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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