
Surf Forecasts:
Cobblestones surf forecast from 6 Aug 2026:
- Best quality surf: Saturday 8 Aug, 5AM (local time) - 21ft (6.5m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 2AM (local time) - 28ft (8.5m), 16s period, SW swell with 35,499 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 5AM (local time) - 21ft (6.5m), 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 Saturday (Aug 08) at 5AM. The primary swell is predicted to be 6.5m and 14s 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 8.5m 16s and forecast to arrive on Tuesday (Aug 11) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Best Surf | 5AM (Sat 8th Aug) | 21ft (6.5m) 14s |
| Most Powerful | 2AM (Tue 11th Aug) | 28ft (8.5m) 16s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, this is Rusty. Let’s have a look at what’s shaping up for Cobblestones. This is a reef break, and it’s an advanced wave – not one for the beginners. The water temp is about normal for this time of year, so nothing out of the ordinary there.
Right now, the first few days are a write-off. Friday the 7th through most of the next week is just nasty – strong cross-onshore winds, huge swell, and the wave energy is massive (7932 to 43876). The swell is coming from the SW, and it’s over 13ft, jumping to 23ft on Saturday the 8th. That’s way too big for any sort of fun paddle surfing, and the wind is straight up messy. It’s more of a kite-surfing show than anything on a surfboard. Sunday the 9th through to Thursday the 13th is still poor – the swell stays big, the wind is either onshore or cross-onshore, and the conditions are just blown out or lumpy. There’s a big gap of about a week where you’d be wasting your time.
Now, the first real standout comes on Friday the 14th of August. The morning sees a 13ft SW swell with a very long 16-second period, and the wind is a light cross-offshore from the NE at 9 mph. The water is clean, the energy is still strong (6723), and the comments say exceptional surf conditions for expert surfers. This is a proper groundswell with that long period, so the reef will handle it well – expect long, powerful lines. The afternoon holds up too with a 12ft SW swell and lighter NE wind. This is the best on offer in the first week and a half, no question.
Another one to keep an eye on is Thursday the 20th of August. The morning has a 12ft WSW swell, moderate offshore wind from the E at 16 mph, and clean conditions. The energy is moderate (4889), but the wind is offshore and the set-up is excellent for experienced surfers. The afternoon is even cleaner with light NE wind. Then on Saturday the 22nd of August, check this out – the morning goes glassy, zero wind, and a 8ft SW swell with a very long 19-second period. That’s exceptional surf for experts, with a wave energy of 7297. The reef will be firing with those long-period lines, and no wind means it’s going to be perfect. This is the second standout, but it’s further out, so it’s promising but less certain.
Overall, the first week is a complete dud with huge swell and bad wind. The real window is Friday the 14th and then Saturday the 22nd of August. Cobblestones is a reef break that only works for advanced surfers, and when it’s on, it’s on. Crowds are possible here – it’s a spot that does get busy sometimes – so get in early on those standouts.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Fri night. Very mild (max 16°C on Thu night, min 11°C on Fri night). Winds increasing (moderate winds from the SW on Thu night, near gales from the WSW by Fri night). | Days 5-7 Weather SummaryModerate rain (total 19mm), heaviest on Mon morning. Very mild (max 16°C on Sun night, min 9°C on Mon afternoon). Winds decreasing (near gales from the SW on Mon afternoon, light winds from the WSW by Wed afternoon). | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 15 | SW 15 | WSW 15 | WSW 13 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 14 | SW 11 | SW 13 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||
9417 | 7932 | 7394 | 14540 | 21330 | 24660 | 20964 | 12497 | 8767 | 5878 | 7927 | 15414 | 35499 | 29095 | 22256 | 14330 | 9529 | 8711 | 8044 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 4:24AM0.90m | 5:45AM0.95m | 6:51AM1.00m | 7:46AM1.03m | 8:35AM1.02m | 9:17AM0.98m | |||||||||||||
Low Tide | 3:09PM0.28m | 3:46PM0.22m | 4:24PM0.20m | 5:00PM0.20m | 5:34PM0.24m | 6:03PM0.29m | |||||||||||||
— | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | |
5:43 | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | |
mm | 2 | — | — | 6 | 4 | 2 | 1 | — | — | 3 | 6 | 3 | 5 | — | — | 2 | — | — | — |
Temp °C | 16 | 14 | 15 | 14 | 11 | 12 | 15 | 16 | 16 | 16 | 13 | 10 | 11 | 14 | 15 | 16 | 16 | 16 | 16 |
Feels °C | 11 | 7 | 7 | 5 | -1 | 3 | 9 | 11 | 11 | 8 | 4 | -2 | 0 | 5 | 8 | 11 | 12 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | WSW 15 | — | — | — | SW 17 | SW 16 | SW 16 | SW 14 | — | — | — | — | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
9417 | 7932 | 7394 | — | — | — | 20964 | 12497 | 8767 | 5878 | — | — | — | — | 22256 | 14330 | 9529 | 8711 | 8044 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | 548 | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 13 | SW 15 | SW 16 | — | — | — | — | SW 11 | SW 13 | SW 16 | SW 16 | SW 16 | — | — | — | — |
— | — | — | 14540 | 21330 | 24660 | — | — | — | — | 7927 | 15414 | 35499 | 29095 | 21620 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 251 | 359 | 1907 | 1797 | 1797 | 1907 | 258 | 512 | 251 | 2684 | 2014 | 2017 | 268 | 268 | 89 | 2 | 38 | 35 |
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.











