Surf Forecasts:
Cobblestones surf forecast from 19 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 13ft (4.0m), 15s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 8AM (local time) - 15ft (4.5m), 19s period, WSW swell with 14,550 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 13ft (4.0m), 15s 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 Friday (Aug 21) at 2AM. The primary swell is predicted to be 4.0m and 15s 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 4.5m 19s and forecast to arrive on Wednesday (Aug 26) at 8AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 25) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 13ft (4.0m) 15s |
| Best Surf | 2AM (Fri 21st Aug) | 13ft (4.0m) 15s |
| Most Powerful | 8AM (Wed 26th Aug) | 15ft (4.5m) 19s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got one spot lighting up the forecast, and it’s a ripper when the stars align. Cobblestones is a heavy reef setup, advanced only, and it’s consistent. The water temp is a touch warmer than normal at 66°, sitting about 3° above average for this time of year.
The next few days are messy. Wednesday the 19th and Thursday the 20th have big, powerful swell—16ft and 13ft—but the wind is on or cross-onshore, and the combo energy is massive (10,770 and 7,197). That’s a lot of grunt, but it’s blown out. Not the best for paddling.
Friday the 21st morning is the first real standout. The swell drops to 12ft from the SW, period 14 seconds, and the wind goes glassy—absolute zero. That’s a proper clean session for those who can handle a big, powerful reef. Combined energy is still massive at 5,427. It’s an expert-only window, but it’ll be worth the paddle out.
After that, Saturday the 22nd through Monday the 24th morning is mostly cross-onshore or choppy, but Monday morning the 24th cleans up with light cross-offshore breeze and 10ft SW swell at 13 seconds. Energy is moderate at 2,760, and conditions are clean. Good for experienced surfers again.
There’s a gap of poor conditions from Tuesday the 25th onward, with strong winds and messy surf. Wednesday the 26th looks big again—15ft WSW swell at 17 seconds, energy roaring at 12,124—but the wind is cross-onshore, so expect chaos. Not worth it for paddle surfing; could be a kite session if that’s your thing.
The next real opportunity comes on Friday the 28th morning. Clean, cross-offshore breeze with 5ft S swell at 12 seconds, energy moderate at 1,526. It’s smaller but clean, and sets should have decent shape. A nice mellow session after all the big stuff.
Saturday the 29th has a tiny 3ft WSW groundswell at a very long 21 seconds. Only for the patient, and best on a point or reef. Clean but minimal push.
The final weeks are a mixed bag. Look at Wednesday morning, September 2nd: clean conditions with a cross-offshore breeze, 10ft WSW swell at 13 seconds, energy 3,460. That’s another solid window for experienced surfers. The best of the long-range stuff is probably Thursday morning, September 3rd: 13ft WSW swell at 15 seconds, light onshore breeze, energy 6,408. It’s not perfect, but for the second week out, it’s promising if the wind stays light.
The absolute standout is Friday the 21st morning. Glassy, 12ft SW groundswell with long 14-second intervals, and that reef handle the juice. Crowds are possible at Cobblestones, but with those conditions, it might just be you and a few other heavy hitters.
Stay safe out there. This is Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Wed night, min 13°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun morning. Very mild (max 16°C on Tue afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 15 | WSW 13 | WSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 9678 | 7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4123 | 3439 | 2056 | 2699 | 2494 | 5156 | 2959 | 2107 | 1025 | 549 | 2148 | 6119 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | glassy | glassy | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross-on |
High Tide | 1:15AM0.78m | 2:08AM0.81m | 3:39AM0.84m | 5:28AM0.87m | 6:35AM0.90m | 7:24AM0.91m | |||||||||||||
Low Tide | 3:31PM0.30m | 3:41PM0.29m | 3:54PM0.28m | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | |||||||||||||
 |  |  |  |  | | | | | |  | | | | | | | |  | |
 | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — |
 | 5:52 | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 2 |
Temp °C | 16 | 15 | 16 | 15 | 14 | 15 | 14 | 14 | 15 | 14 | 15 | 14 | 13 | 13 | 13 | 14 | 15 | 16 | 16 |
Feels °C | 13 | 11 | 13 | 13 | 14 | 13 | 11 | 12 | 11 | 10 | 11 | 8 | 8 | 11 | 10 | 12 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 10 | WSW 13 | WSW 16 |
| kJ | 9678 | 7197 | 7196 | 6375 | 5285 | 4654 | 3056 | 4123 | 3439 | 2056 | 2699 | 2494 | 5156 | 2959 | 2107 | 1025 | 549 | 2148 | 6119 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 24 | SW 20 | SW 17 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | SW 15 | SW 15 | — | S 13 |
| kJ | — | — | — | — | 142 | 1261 | 2719 | — | — | 75 | 596 | 1734 | — | — | — | 258 | 537 | — | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNW 3 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 1 | 0 | 0 | 1 | 0 | 1 | 20 | 20 | 64 | 88 | 0 | 0 | 2 | 2 | 53 | 251 | 201 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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