Surf Forecasts:
Cobblestones surf forecast from 23 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 11AM (local time) - 16ft (5.0m), 18s period, WSW swell with onshore winds.
- Most powerful swell: Wednesday 26 Aug, 11AM (local time) - 16ft (5.0m), 18s period, WSW swell with 16,432 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 11AM (local time) - 16ft (5.0m), 18s period with WSW 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 (Aug 26) at 11AM. The primary swell is predicted to be 5.0m and 18s period. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 5.0m 18s and forecast to arrive on Wednesday (Aug 26) 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 2.0m 6s period and expected on Tuesday (Aug 25) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 26th Aug) | 16ft (5.0m) 18s |
| Best Surf | 11AM (Wed 26th Aug) | 16ft (5.0m) 18s |
| Most Powerful | 11AM (Wed 26th Aug) | 16ft (5.0m) 18s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what’s coming for the next couple of weeks.
First up, we’ve got a big window of serious swell energy hitting Cobblestones, a reef setup that’s going to be strictly for the experienced crew. The water is sitting at 66°F with an anomaly of 3°F, so it’s a touch warmer than usual for this time of year.
The pattern starts off messy. Sunday afternoon the 23rd of August has a 8ft SW swell, but with a cross-onshore wind and a combined energy of 3554, it’s pretty choppy. Not worth rushing out. Monday the 24th looks a bit cleaner with a 10ft SW swell and a light cross breeze, but the tide questions keep the score low. Through Tuesday and into Wednesday the 26th, the wind gets nasty and the swell jumps up. Wednesday morning sees a massive 16ft WSW groundswell with a period of 18 seconds and combined energy through the roof at 16432 – that’s a serious amount of water moving. The wind is offshore, but honestly, 16ft at a reef is only for the absolute top-shelf experts. The same goes for Wednesday afternoon, still 16ft but with a cross-onshore.
The real standout in this whole run is Saturday morning, the 29th of August. That’s where the magic lines up. We’ve got a 10ft SW groundswell at 16 seconds, combined energy of 4708, and a light NNE cross-offshore breeze. The report says clean conditions. That’s a proper session for advanced surfers – long period, clean, and plenty of push. The break is consistent, but being a reef, it’ll hold the swell well. Crowds are possible here, so don’t expect to have it all to yourself.
Sunday the 30th holds on with a 10ft SW swell in the morning and a clean cross-offshore, but the energy drops a bit. After that, things get messy again. From Monday the 31st right through the first week of September, the wind turns onshore or cross-onshore, and the swell stays big but lumpy. Wednesday the 2nd of September has a 13ft WSW swell with a strong cross-onshore, which is more of a kite-surfing setup than a paddle session. The week of the 2nd to the 7th of September sees a massive 23ft swell on the 7th, but it’s too big for even the experts, and the wind is cross-onshore.
So, if you’re paddling out, your best bet is Saturday morning the 29th of August for clean, powerful groundswell at Cobblestones. The rest of the run is either too blown out or too big for most.
Stay safe out there.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Wed morning. Very mild (max 17°C on Tue morning, min 14°C on Sun afternoon). Winds increasing (light winds from the WNW on Mon morning, strong winds from the NW by Tue afternoon). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Wed night. Very mild (max 15°C on Fri afternoon, min 9°C on Sat morning). Winds decreasing (fresh winds from the SSW on Wed night, light winds from the NNE by Sat morning). | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 13 | SW 15 | SW 13 | SW 13 | SW 12 | SW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2345 | 4949 | 3045 | 2490 | 1915 | 2843 | 3587 | 6792 | 16432 | 15551 | 9888 | 5860 | 4747 | 2719 | 1576 | 1076 | 846 | 3955 | 6314 | 3650 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | cross | cross | cross-on | on | on | cross-on | cross-on | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-on | off |
High Tide | 6:35AM0.90m | 7:24AM0.91m | 8:07AM0.91m | 8:49AM0.90m | 11:28PM0.59m | 9:30AM0.85m | 11:07PM0.60m | 10:11AM0.79m | 11:06PM0.63m | |||||||||||
Low Tide | 4:05PM0.29m | 4:17PM0.29m | 4:29PM0.31m | 4:41PM0.32m | 4:53PM0.34m | 2:29AM0.56m | 5:05PM0.37m | 3:35AM0.51m | 5:13PM0.41m | 4:35AM0.46m | ||||||||||
 |  |  | | |  | |  | | |  |  | | | | |  | | | | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — |
 | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — |
mm | — | — | — | — | — | 1 | 5 | 11 | 5 | 3 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 16 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 15 | 13 | 12 | 14 | 14 |
Feels °C | 9 | 12 | 13 | 10 | 11 | 10 | 10 | 13 | 10 | 11 | 7 | 8 | 8 | 7 | 9 | 10 | 8 | 10 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 15 | SW 13 | SW 13 | SW 12 | SW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 16 | SW 17 | SW 15 |
| kJ | 2345 | 4949 | 3045 | 2490 | 1915 | 2843 | 3587 | 6792 | 16432 | 15551 | 9888 | 5860 | 4747 | 2719 | 1576 | 1076 | 846 | 3955 | 6314 | 3650 |
Swell 2 Height (m) Direction Period (s) | WSW 16 | — | — | — | SW 15 | — | S 12 | WSW 22 | — | — | — | — | — | SW 21 | SW 20 | SW 20 | SW 18 | SW 20 | — | SW 18 |
| kJ | 1209 | — | — | — | 565 | — | 3 | 480 | — | — | — | — | — | 18 | 15 | 60 | 323 | 753 | — | 1398 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 24 | S 12 | — | — | — | — | — | — | W 26 | WSW 23 | SW 22 | — | — | — |
| kJ | — | — | — | — | — | — | 11 | 11 | — | — | — | — | — | — | 13 | 54 | 227 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 4 | NW 6 | NW 6 | — | — | — | — | — | — | — | — | — | — | — | N 5 | — |
| kJ | — | — | — | — | 31 | 171 | 157 | — | — | — | — | — | — | — | — | — | — | — | 19 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 20 | 2 | 38 | 251 | 53 | 251 | 251 | 2 | 35 | 35 | 89 | 1340 | 1797 | 1 | 1 | 20 | 0 | 0 | 2 | 0 |
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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